CN113264685B - Microcrystalline glass, microcrystalline panel and electric appliance - Google Patents
Microcrystalline glass, microcrystalline panel and electric appliance Download PDFInfo
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- CN113264685B CN113264685B CN202010097885.7A CN202010097885A CN113264685B CN 113264685 B CN113264685 B CN 113264685B CN 202010097885 A CN202010097885 A CN 202010097885A CN 113264685 B CN113264685 B CN 113264685B
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- 239000011521 glass Substances 0.000 title claims abstract description 72
- 239000002241 glass-ceramic Substances 0.000 claims abstract description 55
- 239000002667 nucleating agent Substances 0.000 claims abstract description 45
- DLYUQMMRRRQYAE-UHFFFAOYSA-N tetraphosphorus decaoxide Chemical compound O1P(O2)(=O)OP3(=O)OP1(=O)OP2(=O)O3 DLYUQMMRRRQYAE-UHFFFAOYSA-N 0.000 claims description 30
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical compound O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 19
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 14
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 claims description 14
- MCMNRKCIXSYSNV-UHFFFAOYSA-N ZrO2 Inorganic materials O=[Zr]=O MCMNRKCIXSYSNV-UHFFFAOYSA-N 0.000 claims description 13
- 238000005204 segregation Methods 0.000 claims description 13
- QVQLCTNNEUAWMS-UHFFFAOYSA-N barium oxide Chemical compound [Ba]=O QVQLCTNNEUAWMS-UHFFFAOYSA-N 0.000 claims description 10
- 239000004408 titanium dioxide Substances 0.000 claims description 9
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims description 8
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 claims description 8
- RVTZCBVAJQQJTK-UHFFFAOYSA-N oxygen(2-);zirconium(4+) Chemical compound [O-2].[O-2].[Zr+4] RVTZCBVAJQQJTK-UHFFFAOYSA-N 0.000 claims description 7
- 239000000377 silicon dioxide Substances 0.000 claims description 7
- KKCBUQHMOMHUOY-UHFFFAOYSA-N sodium oxide Chemical compound [O-2].[Na+].[Na+] KKCBUQHMOMHUOY-UHFFFAOYSA-N 0.000 claims description 7
- 239000011787 zinc oxide Substances 0.000 claims description 7
- FUJCRWPEOMXPAD-UHFFFAOYSA-N lithium oxide Chemical compound [Li+].[Li+].[O-2] FUJCRWPEOMXPAD-UHFFFAOYSA-N 0.000 claims description 6
- 229910001947 lithium oxide Inorganic materials 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 4
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 4
- 239000005083 Zinc sulfide Substances 0.000 claims description 4
- WGLPBDUCMAPZCE-UHFFFAOYSA-N chromium trioxide Inorganic materials O=[Cr](=O)=O WGLPBDUCMAPZCE-UHFFFAOYSA-N 0.000 claims description 4
- 229940117975 chromium trioxide Drugs 0.000 claims description 4
- GAMDZJFZMJECOS-UHFFFAOYSA-N chromium(6+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Cr+6] GAMDZJFZMJECOS-UHFFFAOYSA-N 0.000 claims description 4
- 229910052802 copper Inorganic materials 0.000 claims description 4
- 239000010949 copper Substances 0.000 claims description 4
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims description 4
- 229910052737 gold Inorganic materials 0.000 claims description 4
- 239000010931 gold Substances 0.000 claims description 4
- 229910052697 platinum Inorganic materials 0.000 claims description 4
- 229910052709 silver Inorganic materials 0.000 claims description 4
- 239000004332 silver Substances 0.000 claims description 4
- 235000013024 sodium fluoride Nutrition 0.000 claims description 4
- 239000011775 sodium fluoride Substances 0.000 claims description 4
- 229910052984 zinc sulfide Inorganic materials 0.000 claims description 4
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 claims description 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 3
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 3
- 235000012239 silicon dioxide Nutrition 0.000 claims description 3
- 229910001948 sodium oxide Inorganic materials 0.000 claims description 3
- 150000004673 fluoride salts Chemical class 0.000 claims description 2
- 150000002739 metals Chemical class 0.000 claims description 2
- 239000013081 microcrystal Substances 0.000 claims description 2
- -1 oxides Chemical class 0.000 claims description 2
- 150000004763 sulfides Chemical class 0.000 claims description 2
- 230000035939 shock Effects 0.000 abstract description 24
- 238000010899 nucleation Methods 0.000 description 11
- 238000002834 transmittance Methods 0.000 description 11
- 230000006911 nucleation Effects 0.000 description 10
- 230000003014 reinforcing effect Effects 0.000 description 7
- 238000002425 crystallisation Methods 0.000 description 6
- 230000008025 crystallization Effects 0.000 description 6
- 239000013078 crystal Substances 0.000 description 5
- 230000002776 aggregation Effects 0.000 description 4
- 238000004220 aggregation Methods 0.000 description 4
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 238000005191 phase separation Methods 0.000 description 2
- 230000010287 polarization Effects 0.000 description 2
- KRHYYFGTRYWZRS-UHFFFAOYSA-M Fluoride anion Chemical compound [F-] KRHYYFGTRYWZRS-UHFFFAOYSA-M 0.000 description 1
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 1
- 230000004913 activation Effects 0.000 description 1
- 229910000147 aluminium phosphate Inorganic materials 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 238000003490 calendering Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 238000006116 polymerization reaction Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C10/00—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
- C03C10/0018—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition containing SiO2, Al2O3 and monovalent metal oxide as main constituents
- C03C10/0027—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition containing SiO2, Al2O3 and monovalent metal oxide as main constituents containing SiO2, Al2O3, Li2O as main constituents
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Glass Compositions (AREA)
Abstract
The invention discloses microcrystalline glass, a microcrystalline panel and an electric appliance. The glass ceramic comprises: a glass phase; and the microcrystalline phase is dispersed in the glass phase, the microcrystalline glass contains a nucleating agent, and the content of the nucleating agent is 1-12% based on the total mass of the microcrystalline glass. Therefore, the glass ceramic has good cold and hot shock resistance and higher impact resistance.
Description
Technical Field
The invention relates to the field of electric appliances, in particular to microcrystalline glass, a microcrystalline panel and an electric appliance.
Background
The microcrystal panel has good thermal shock resistance and is widely applied to kitchen appliances such as electromagnetic ovens, multi-burner ovens, microwave ovens and the like. The current production process of microcrystalline glass generally comprises the processes of proportioning, mixing, glass melting, calendaring, stress relief annealing, nucleating, crystallizing, cutting, polishing and grinding and the like, and the formed microcrystalline phase is uniformly distributed in the glass phase.
However, the prior glass ceramics, glass ceramic panels and electric appliances still need to be improved.
Disclosure of Invention
The present invention has been made based on the findings and knowledge of the inventors regarding the following facts and problems:
the inventor discovers that the prior microcrystalline glass has the problems of poor cold and hot shock resistance and low impact resistance.
The present invention aims to at least partially alleviate or solve at least one of the above mentioned problems.
In one aspect of the invention, a glass ceramic is provided. The glass ceramic comprises: a glass phase; and the microcrystalline phase is dispersed in the glass phase, the microcrystalline glass contains a nucleating agent, and the content of the nucleating agent is 1-12% based on the total mass of the microcrystalline glass. Therefore, the glass ceramic has good cold and hot shock resistance and higher impact resistance.
According to the embodiment of the invention, the content of the nucleating agent is 1-11% based on the total mass of the glass-ceramic. Further, the content of the nucleating agent is 1-10%. Therefore, the glass ceramic has good cold and hot shock resistance, higher impact strength and good transmittance.
According to an embodiment of the invention, the nucleating agent comprises at least one selected from the group consisting of metals, oxides, fluorides and sulfides. Thus, nucleation of the microcrystalline phase can be promoted by the above-mentioned nucleating agent.
According to an embodiment of the present invention, the nucleating agent comprises at least one selected from gold, silver, copper, platinum, titanium dioxide, zirconium dioxide, phosphorus pentoxide, chromium trioxide, sodium fluoride and zinc sulfide. Thus, nucleation of the microcrystalline phase can be promoted using the above-described widely available nucleating agents.
According to the embodiment of the invention, a microcrystalline phase segregation region and a microcrystalline phase non-segregation region are formed in the microcrystalline glass, and the number of the microcrystalline phases in the unit area of the microcrystalline phase segregation region is larger than the number of the microcrystalline phases in the unit area of the microcrystalline phase non-segregation region. Therefore, the glass ceramic can play a role similar to that of a reinforcing rib, so that the overall strength of the glass ceramic is improved.
According to an embodiment of the present invention, the number of the microcrystalline phases per unit area of the microcrystalline phase non-biased region differs from the number of the microcrystalline phases per unit area of the microcrystalline phase biased region by not more than 50%. Therefore, the function similar to that of the reinforcing rib can be exerted, the overall strength of the microcrystalline glass is improved, and meanwhile, the number of microcrystalline phases in the microcrystalline phase non-biased region is also more, so that the cold and hot shock resistance and impact resistance of the whole microcrystalline glass can be improved.
According to the embodiment of the invention, the microhardness of at least one region of the glass ceramics is not lower than 700HV. Therefore, the microcrystalline glass has higher impact strength.
According to the embodiment of the invention, the thermal expansion coefficient of the microcrystalline glass is not higher than 1 multiplied by 10 -6/K and is 25-500 degrees. Therefore, the glass ceramic has good cold and hot shock resistance.
According to an embodiment of the present invention, the glass-ceramic contains phosphorus pentoxide in an amount of 1 to 6.8% by mass, and the microcrystalline phase contains lithium oxide, aluminum oxide, and silicon dioxide. Therefore, the glass ceramic has good cold and hot shock resistance, higher impact strength, good transmittance and good thermal shock resistance.
According to an embodiment of the present invention, the glass ceramic contains: 3.0 to 4.0wt% of lithium oxide; 15-25 wt% of alumina; 55 to 65wt% of silica; 0.5 to 1.0 weight percent of sodium oxide; 2 to 4wt% of titanium dioxide; 2 to 4 weight percent zirconia; 1.2 to 1.6 weight percent of barium oxide; 1.2 to 1.5 weight percent of zinc oxide; and 1 to 6wt% of phosphorus pentoxide. Therefore, the glass ceramic has good cold and hot shock resistance, higher impact strength, good transmittance and good thermal shock resistance.
In another aspect of the invention, the invention provides a microcrystalline panel. The microcrystalline panel is formed from the microcrystalline glass described above. Therefore, the microcrystalline panel has all the features and advantages of the microcrystalline glass, and is not described herein. In general, the microcrystalline panel has good thermal shock resistance and strong impact resistance.
In another aspect of the invention, the invention provides an electrical appliance. The appliance comprises the microcrystalline panel described above. Thus, the electrical appliance has all the features and advantages of the microcrystalline panel described above, and will not be described in detail herein. In general, the electric appliance has good cold and hot impact resistance and stronger impact resistance.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
FIG. 1 shows a schematic structural diagram of a glass-ceramic according to an embodiment of the present invention.
Reference numerals illustrate:
10: a glass phase; 20: a microcrystalline phase; 30: stress lines.
Detailed Description
Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the invention.
In one aspect of the invention, a glass ceramic is provided. According to an embodiment of the present invention, referring to fig. 1, the glass ceramic includes: the glass phase 10 and the microcrystalline phase 20, wherein the microcrystalline phase 20 is dispersed in the glass phase 10, the microcrystalline glass contains a nucleating agent, and the content of the nucleating agent is 1-12% based on the total mass of the microcrystalline glass. Therefore, the microcrystalline glass has a large number of microcrystalline phases in each region, so that the microcrystalline glass has good cold and hot shock resistance and strong impact resistance.
The term "glass ceramic" as used herein refers to a solid multiphase composite containing a microcrystalline phase and a glass phase, which is produced by crystallizing a large amount of fine crystals by controlling crystallization during heating of glass. Wherein, the microcrystalline phase refers to the crystal with micron scale, and the glass phase presents amorphous area with amorphous structure. Those skilled in the art will appreciate that small amounts of complexes of multiple unit cells are allowed to exist in the glassy phase, provided that the size of these complexes is smaller than the size of the microcrystalline phase particles, e.g., small amounts of nuclei or nucleating agents may be present in the glassy phase. The microcrystalline phase and the glass phase in the glass-ceramic can be separated by a person skilled in the art by various conventional means, for example, a scanning electron microscope, especially a Field Emission Scanning Electron Microscope (FESEM), can effectively distinguish the microcrystalline phase and the glass phase in the glass-ceramic, and can effectively analyze the position and the number of the microcrystalline phase.
According to embodiments of the present invention, the nucleating agent may be present in an amount of 1-11% based on the total mass of the glass-ceramic. The inventors found that if the content of the nucleating agent is too small, the effect of increasing the number of microcrystalline nuclei cannot be achieved, and if the content of the nucleating agent is too large, glass crystallization is excessive, ceramic formation of microcrystalline glass occurs, and the transmittance of the microcrystalline glass is reduced, the color is darkened, and the like. According to the invention, the content of the nucleating agent in the microcrystalline glass is set in the range, so that the number of microcrystalline phases in each region of the microcrystalline glass can be increased, the thermal shock resistance and impact resistance of the microcrystalline glass are improved, and the microcrystalline glass has good transmittance. Further, the content of the nucleating agent in the glass ceramic can be 1-10%.
According to an embodiment of the present invention, the nucleating agent may include a metal nucleating agent and a compound nucleating agent, and in particular, the nucleating agent may include at least one selected from the group consisting of a metal, an oxide, a fluoride, and a sulfide. Thus, nucleation of the microcrystalline phase can be promoted by the above-mentioned nucleating agent.
According to a specific embodiment of the present invention, the nucleating agent may include at least one selected from gold, silver, copper, platinum, titanium dioxide, zirconium dioxide, phosphorus pentoxide, chromium trioxide, sodium fluoride and zinc sulfide. Thus, nucleation of the microcrystalline phase can be promoted using the above-described widely available nucleating agents. According to embodiments of the present invention, metal nucleating agents (e.g., gold, silver, copper, platinum) are present in the glass in a dispersed state of colloidal particle size, and nucleation is induced during crystallization to promote crystallization. Compound nucleating agents (such as titanium dioxide, zirconium dioxide, phosphorus pentoxide, chromium trioxide, sodium fluoride, zinc sulfide) dissolve in the glass and promote heterogeneous nucleation during crystallization by phase separation or direct precipitation of crystals, resulting in crystallization.
The content of the nucleating agent described above is the total content of all the nucleating agents contained in the glass-ceramic.
According to an embodiment of the present invention, referring to fig. 1, the glass ceramic has stress patterns 30 therein, and 1-5 stress patterns, such as at least 1 cubic centimeter, at least 5 cubic centimeters, at least 10 cubic centimeters, at least 15 cubic centimeters, at least 20 cubic centimeters, at least 25 cubic centimeters, are present in the glass ceramic in a region of at least about 1 cubic centimeter, and 1-5 stress patterns are present in a region of at least about 25 cubic centimeters, each stress pattern 30 having a width of about at least 5nm and at most 100nm, such as 10nm, 20nm, 30nm, 40nm, 50nm, 60nm, 70nm, 80nm, 90nm, 100nm. Therefore, stress lines can induce heterogeneous nucleation of the microcrystalline phase, and a microcrystalline phase segregation region is formed near the stress lines, so that the function similar to that of reinforcing ribs can be exerted, and the overall strength of the microcrystalline glass is improved.
It should be noted that, stress lines can be detected by a polarization stress meter, and the polarization stress meter emits two parallel light beams, and as stress concentration exists at the stress lines, the crystal lattice is distorted, so that optical path difference is generated by the two parallel light beams, and the number and the width of the stress lines can be analyzed.
According to an embodiment of the present invention, in the glass-ceramic, a microcrystalline phase-biased region (refer to region a in fig. 1) and a microcrystalline phase-non-biased region (refer to region B in fig. 1) are formed, and the number of the microcrystalline phases per unit area of the microcrystalline phase-biased region is larger than the number of the microcrystalline phases per unit area of the microcrystalline phase-non-biased region. That is, the microcrystalline phase-biased region is a region containing stress patterns, and the microcrystalline phase-non-biased region is a region not containing stress patterns. The existence of stress lines can cause the microcrystalline phase to be biased and aggregated near the stress lines, and the number of microcrystalline phases in a microcrystalline phase non-biased aggregation region can be influenced, the content of the nucleating agent is 1-12%, the number of microcrystalline phases in the microcrystalline phase non-biased aggregation region can be increased, the problem that the number of microcrystalline phases in the microcrystalline phase non-biased aggregation region is insufficient in microcrystalline glass is solved, that is, the number of microcrystalline phases in the microcrystalline phase non-biased aggregation region is more under the condition that the microcrystalline phase is biased and aggregated near the stress lines, the cold and heat shock resistance and the impact strength of the whole microcrystalline glass can be improved, the function similar to a reinforcing rib can be exerted, and the integral strength of the microcrystalline glass can be further improved.
According to an embodiment of the present invention, the number of microcrystalline phases per unit area of the microcrystalline phase non-biased region does not differ by more than 50% from the number of microcrystalline phases per unit area of the microcrystalline phase biased region. If the number of microcrystalline phases in the microcrystalline phase non-segregation region is less than 50% different from the number of microcrystalline phases in the microcrystalline phase segregation region in a 1cm by 1cm area. Therefore, the microcrystalline phase is partially polymerized near the stress lines, and the number of microcrystalline phases in the microcrystalline phase non-partially polymerized region is also more, so that the cold and heat shock resistance and impact resistance of the whole microcrystalline glass can be improved, the function similar to that of a reinforcing rib can be exerted, and the integral strength of the microcrystalline glass can be further improved.
It should be noted that the number of microcrystalline phases in the microcrystalline phase segregation region and the microcrystalline phase non-segregation region may be detected by using a field emission scanning electron microscope, for example, the number of microcrystalline phases at a certain longitudinal section of the microcrystalline phase segregation region is detected, and the number of microcrystalline phases at a certain longitudinal section of the microcrystalline phase non-segregation region is detected, where the number of microcrystalline phases in the two regions is different by less than 50%.
According to an embodiment of the present invention, the glass ceramic may contain phosphorus pentoxide (P 2O5) in an amount of 1 to 6.8% by mass, for example, P 2O5 may be contained in an amount of 1%, 1.2%, 2%, 2.5%, 3%, 3.8%, 4%, 4.6%, 5%, 5.7%, 6%, 6.3%, 6.8% by mass, and the microcrystalline phase contains lithium oxide, aluminum oxide, and silicon dioxide. P 2O5 is easy to form an asymmetric phosphoric acid polyhedron in a silica network, and the field intensity of P 5+ is larger than that of Si 4+, so that P 2O5 can promote phase separation, reduce interface energy, reduce nucleation activation energy and promote micro-nucleation. The content of P 2O5 is 1-6.8%, so that the microcrystalline phases are uniformly distributed, the cold and heat shock resistance and impact resistance of the microcrystalline glass are improved, the microcrystalline glass has good transmittance, and meanwhile, the microcrystalline phases are concentrated near stress lines, so that a structure similar to a reinforcing rib can be formed, and the overall strength of the microcrystalline glass is improved.
According to an embodiment of the present invention, the glass-ceramic may contain: 3.0 to 4.0wt% of lithium oxide; 15-25 wt% of alumina; 55 to 65wt% of silica; 0.5 to 1.0 weight percent of sodium oxide; 2 to 4wt% of titanium dioxide; 2 to 4 weight percent zirconia; 1.2 to 1.6 weight percent of barium oxide; 1.2 to 1.5 weight percent of zinc oxide; and 1 to 6wt% of phosphorus pentoxide. Therefore, the glass ceramic has good cold and hot shock resistance, higher impact strength, good transmittance and good thermal shock resistance. Phosphorus pentoxide is used as a main nucleating agent, and titanium dioxide and zirconium dioxide are used as auxiliary nucleating agents.
The inventors found that, compared with auxiliary nucleating agents such as titanium dioxide and zirconium dioxide, the effect of P 2O5 on microcrystalline phase nucleation is larger, the content of P 2O5 is controlled to be 1-6%, the problem of insufficient number of microcrystalline phases in a microcrystalline phase non-biased polymerization zone can be effectively improved, and other defects cannot be caused.
According to an embodiment of the invention, the microhardness of at least one region of the glass-ceramic is not lower than 700HV. Therefore, the microcrystalline glass has higher impact strength.
According to the embodiment of the invention, the thermal expansion coefficient of the microcrystalline glass is not higher than 1 multiplied by 10 -6/K and is 25-500 degrees. Therefore, the glass ceramic has good cold and hot shock resistance.
In conclusion, the invention improves the content of the nucleating agent in the microcrystalline glass, and the mass content of the nucleating agent is 1-12%, so that the microcrystalline phase is uniformly distributed in the glass phase, the number of the microcrystalline phase is increased, the cold and hot shock resistance and the impact resistance of the microcrystalline glass are improved, and meanwhile, the stress induces the nonuniform nucleation of crystals, so that the microcrystalline phase is biased to gather near stress lines, a structure similar to a reinforcing rib is formed, and the overall strength of the microcrystalline glass is improved.
In another aspect of the invention, the invention provides a microcrystalline panel. According to an embodiment of the invention, the microcrystalline panel is formed from the microcrystalline glass described above. Therefore, the microcrystalline panel has all the features and advantages of the microcrystalline glass described above, and will not be described herein. In general, the microcrystalline panel has good thermal shock resistance and strong impact resistance.
In another aspect of the invention, the invention provides an electrical appliance. According to an embodiment of the invention, the appliance comprises the microcrystalline panel described above. Thus, the electrical appliance has all the features and advantages of the microcrystalline panel described above, and will not be described in detail herein. In general, the electric appliance has good cold and hot impact resistance and stronger impact resistance.
According to an embodiment of the present invention, the electric appliance may include an induction cooker, a multi-burner oven, a microwave oven, and the like. Therefore, the electric appliance has good cold and hot shock resistance, higher impact resistance, good transmittance and good thermal shock resistance.
The following description is made in connection with specific embodiments of the invention.
Example 1
Each component and the content of the microcrystalline glass are ：3.5wt％LiO2,20wt％Al2O3,62wt％SiO2,0.8wt％Na2O,3wt％TiO2,2wt％ZrO2、1.5wt％BaO,1.3wt％ZnO,0.8wt％P2O5 percent and 5.1 percent of other components by weight.
Example 2
Each component and the content of the microcrystalline glass are ：3.5wt％LiO2,20wt％Al2O3,61wt％SiO2,0.8wt％Na2O,3wt％TiO2,2wt％ZrO2、1.5wt％BaO,1.3wt％ZnO,2wt％P2O5 and 4.9 weight percent of other components.
Example 3
Each component and the content of the microcrystalline glass are ：3.5wt％LiO2,20wt％Al2O3,58wt％SiO2,0.8wt％Na2O,3wt％TiO2,2wt％ZrO2、1.5wt％BaO,1.3wt％ZnO,5wt％P2O5 and 4.9 weight percent of other components.
Example 4
Each component and the content of the microcrystalline glass are ：3.5wt％LiO2,20wt％Al2O3,56wt％SiO2,0.8wt％Na2O,3wt％TiO2,2wt％ZrO2、1.5wt％BaO,1.3wt％ZnO,7wt％P2O5 and 4.9 weight percent of other components.
Examples 1 to 4 the respective components and contents of the glass ceramics are shown in Table 1.
The glass ceramics obtained in examples 1 to 4 were subjected to performance test, and the test results are shown in Table 2.
TABLE 1
TABLE 2
From examples 1 to 4, it is understood that, in the case where the content of the auxiliary nucleating agent (titanium oxide and zirconium dioxide) is not changed, as the content of the main nucleating agent P 2O5 is increased, the microhardness of the glass ceramics is increased, the thermal expansion coefficient is decreased, and the transmittance is deteriorated.
The microcrystalline panels of examples 2 and 3 have a P 2O5 content of 1-6% and have a high microhardness, a low coefficient of thermal expansion and good light transmittance.
Example 1 the amount of nucleating agent P 2O5 of example 1 was less than 1% compared to example 2, resulting in a higher coefficient of thermal expansion (greater than 1 x 10 -6/K) for the glass-ceramic of example 1.
Example 4 the content of nucleating agent P 2O5 of example 4 was greater than 6% compared to example 2, resulting in bluing the appearance of the glass-ceramic of example 4 and poor light transmittance.
In the description of the present invention, the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present invention and do not require that the present invention must be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present invention.
In the description of the present specification, reference to the term "one embodiment," "another embodiment," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment is included in at least one embodiment of the invention. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, the different embodiments or examples described in this specification and the features of the different embodiments or examples may be combined and combined by those skilled in the art without contradiction. In addition, it should be noted that, in this specification, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated.
While embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and not to be construed as limiting the invention, and that variations, modifications, alternatives and variations may be made to the above embodiments by one of ordinary skill in the art within the scope of the invention.
Claims (12)
1. The glass ceramic is characterized by comprising the following components in percentage by weight:
a glass phase;
a microcrystalline phase dispersed in the glass phase, wherein the microcrystalline glass contains a nucleating agent, the content of the nucleating agent is 1-12% based on the total mass of the microcrystalline glass,
In the microcrystalline glass, a microcrystalline phase offset region and a microcrystalline phase non-offset region are formed, the number of the microcrystalline phases in the unit area of the microcrystalline phase offset region is larger than the number of the microcrystalline phases in the unit area of the microcrystalline phase non-offset region,
The microcrystalline glass is provided with stress lines, and the existence of the stress lines enables microcrystalline phases to be polarized and polymerized near the stress lines to form the microcrystalline phase polarized and polymerized region.
2. The glass-ceramic according to claim 1, wherein the nucleating agent is contained in an amount of 1 to 11% based on the total mass of the glass-ceramic.
3. The glass-ceramic according to claim 1, wherein the nucleating agent is contained in an amount of 1 to 10% based on the total mass of the glass-ceramic.
4. The glass-ceramic according to claim 1, wherein the nucleating agent comprises at least one selected from the group consisting of metals, oxides, fluorides, and sulfides.
5. The glass-ceramic according to claim 4, wherein the nucleating agent comprises at least one selected from the group consisting of gold, silver, copper, platinum, titanium dioxide, zirconium dioxide, phosphorus pentoxide, chromium trioxide, sodium fluoride, and zinc sulfide.
6. The glass-ceramic according to claim 1, wherein the number of the microcrystalline phases per unit area of the microcrystalline phase non-segregation region is not more than 50% different from the number of the microcrystalline phases per unit area of the microcrystalline phase segregation region.
7. The glass-ceramic according to claim 1, wherein at least one region of the glass-ceramic has a microhardness of not less than 700HV.
8. The glass-ceramic according to claim 1, wherein the glass-ceramic has a thermal expansion coefficient of not more than 1 x 10 -6/K, 25 to 500 degrees.
9. The glass-ceramic according to claim 1, wherein the glass-ceramic contains phosphorus pentoxide in an amount of 1 to 6.8% by mass, and the microcrystalline phase contains lithium oxide, aluminum oxide and silicon dioxide.
10. The glass-ceramic according to claim 1, wherein the glass-ceramic comprises:
3.0 to 4.0wt% of lithium oxide;
15-25 wt% of alumina;
55 to 65wt% of silica;
0.5 to 1.0 weight percent of sodium oxide;
2 to 4wt% of titanium dioxide;
2 to 4 weight percent zirconia;
1.2 to 1.6 weight percent of barium oxide;
1.2 to 1.5 weight percent of zinc oxide; and
1 To 6wt% of phosphorus pentoxide.
11. A microcrystalline panel formed from the glass defined in any one of claims 1 to 10.
12. An electrical appliance comprising the microcrystal panel of claim 11.
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1699230A (en) * | 2005-01-20 | 2005-11-23 | 湖州大享玻璃制品有限公司 | Li2O-Al2O3-SiO2 microcrystalline glass and microcrystalline glass and making process thereof |
| CN101152973A (en) * | 2006-09-28 | 2008-04-02 | 中南大学 | Crystallizing glass material for 4J29 kovar alloy sealing-in and method of producing the same |
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| US9260342B2 (en) * | 2011-04-20 | 2016-02-16 | Straumann Holding Ag | Process for preparing a glass-ceramic body |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1699230A (en) * | 2005-01-20 | 2005-11-23 | 湖州大享玻璃制品有限公司 | Li2O-Al2O3-SiO2 microcrystalline glass and microcrystalline glass and making process thereof |
| CN101152973A (en) * | 2006-09-28 | 2008-04-02 | 中南大学 | Crystallizing glass material for 4J29 kovar alloy sealing-in and method of producing the same |
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