CN101003417B - Environmental protective flint optical glass with heavy lanthanum and production method - Google Patents
Environmental protective flint optical glass with heavy lanthanum and production method Download PDFInfo
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- CN101003417B CN101003417B CN2006100225960A CN200610022596A CN101003417B CN 101003417 B CN101003417 B CN 101003417B CN 2006100225960 A CN2006100225960 A CN 2006100225960A CN 200610022596 A CN200610022596 A CN 200610022596A CN 101003417 B CN101003417 B CN 101003417B
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Abstract
This invention provides environmentally friendly heavy lanthanum flint optical glass with high refractive index and medium optical dispersion. The optical glass is composed of: SiO2: 20-40 wt.%, B2O3: 5-20 wt.%, TiO2: 5-20 wt.%, Nb2O5: 5-20 wt.%, ZrO2: 0-3 wt.%, Sb2O3: 0-0.5 wt.%, La2O3: 10-30 wt.%, K2O, Na2O, Bao, CaO and SrO, wherein the sum of the K2O and the Na2O is 0-5 wt.%, and the sum of the BaO, the CaO and the SrO is 12-40 wt.%. The optical glass does not contain pollutive components such as PbO, As2O3 or GdO2, wherein the Nd is 1.74-1.83, and Nf-Nc is 32-47. This invention adopts one-step material melting in a tank furnace to produce the optical glass, and improves the optical permeation performance, has advantages of small working procedures, short production period and reduced production cost.
Description
Technical field
The present invention relates to a kind of opticglass and preparation method and apparatus thereof, particularly a kind of high refractive index (Nd) and medium chromatic dispersion (Nf-Nc) environment friendly heavy-lanthanide flint optical glass and production method thereof.
Background technology
Along with the raising of people's living standard, for satisfying the high pixel of high-grade digital product, the requirement of small portable, the demand of flint optical glass with heavy lanthanum with advantages such as high refraction, medium chromatic dispersion, density are little is increasing.For making opticglass have above-mentioned performance, the La in the glass ingredient
2O
3, TiO
2, Nb
2O
5Also corresponding increase, but these components can cause in the production process that glass metal viscosity is little, crystallization serious, the optical constant fluctuation is big, to consequences such as equipment corrosion are big, make glass cord of low quality, the production difficulty is very big, and does not mostly have environmental protection characteristic.
Environment friendly heavy-lanthanide flint glass is because of its prescription characteristics at present, most producers adopt the method for secondary material to produce, production technique is: with the raw material for preparing behind thorough mixing, at high temperature be fused into fragments of glass with single crucible, after the specific refractory power of tested glass, qualified glass slag put in the high temperature tank furnace once more be fused into glass metal, become the glass billot through the clarification and homogenization aftershaping.Because this method through twice high temperature, influenced the through performance of glass, and operation is more, the production cycle is long, the production cost height.
Summary of the invention
Technical problem to be solved by this invention provides the environment friendly heavy-lanthanide flint optical glass of the medium chromatic dispersion of a kind of high refractive index, does not contain PbO, As in this opticglass
2O
3And GdO
2The component that environment is polluted, and Nd is 1.74-1.83, Nf-Nc is 32-47.
The present invention also will provide a kind of production method of above-mentioned opticglass, and this method is only through a high temperature, and the through performance of glass is good, and operation is few, with short production cycle, production cost is lower.
The technical scheme that technical solution problem of the present invention is taked is: environment friendly heavy-lanthanide flint optical glass, its weight percent consists of: SiO
2: 20-40%, B
2O
3: 5-20%, TiO
2: 5-20%, Nb
2O
5: 5-20%, ZrO
2: 0-3%, Sb
2O
3: 0-0.5%, La
2O
3: 10-30%, K
2O, Na
2O, BaO, CaO and SrO, wherein said K
2O and Na
2The summation of O content is 0-5%, and described BaO, CaO and SrO content summation are 12-40%.
The invention has the beneficial effects as follows: do not contain PbO, As in the opticglass of the present invention
2O
3And GdO
2To the component that environment pollutes, its photosensitiveness index is: Nd:1.74-1.83, Nf-Nc:32-47.The mode that the present invention adopts tank furnace once to change material is produced, Production Flow Chart links up, succinct, reduced the high temperature melting number of times, under the identical condition of raw materials quality, can improve optical transmittance, and operation is few, with short production cycle, has reduced production cost.
Description of drawings
Fig. 1 is the mode of production schema of existing secondary material.
Fig. 2 is the schema that the present invention once changes the material mode of production.
Fig. 3 is the grid agitator synoptic diagram.
Fig. 4 is a production unit synoptic diagram of the present invention.
Embodiment
The glass that opticglass of the present invention contains 20-40% (weight percent content, as follows) generates body SiO
2, if SiO in the glass
2Too high levels, then the specific refractory power of glass does not reach requirement, and the smelting temperature height melts difficulty simultaneously; Content is low excessively, then reduces ability and the chemical stability that forms glass, preferred SiO
2Content is 20-35%, and particularly preferred content is 20-28%.
It is B that another kind of glass of the present invention generates body
2O
3, B
2O
3Have the function of fluxing, its content is 5-20%, and preferred content is 6-17%, is preferably 7-14% especially.
For making glass have high refractive index, need contain suitable high refractive index composition, the present invention selects TiO for use
2, Nb
2O
5, ZrO
2And La
2O
3
TiO
2Content is 5-20%, can significantly improve the specific refractory power and the chromatic dispersion of glass, and too high levels can increase the tendency towards devitrification of glass, makes the through performance variation of glass; Content is crossed low then specific refractory power and is not reached requirement, preferred TiO
2Content is 7-15%, is preferably 9-13% especially.
Nb
2O
5Characteristics with the specific refractory power that improves glass can improve the crystallization and the through performance of glass, but too high levels can cause then the specific refractory power of glass and abbe number not to reach requirement, increases the raw materials cost of glass simultaneously, preferred Nb
2O
5Content is 5-20%, particularly preferred Nb
2O
5Content is 10-20%.
ZrO
2Content be 0-3%, be used for adjusting the physical and chemical performance of glass.
La
2O
3Make glass have the characteristics of high-refractivity and low-dispersion, its content is 10-30%, and too high levels is the crystallization property variation of glass then; Content is crossed low then specific refractory power and chromatic dispersion does not reach requirement, preferred La
2O
3Content is 10-25%, is preferably 12-22% especially.
The composition of fluxing of the present invention is K
2O and Na
2O, the summation of its content is 0-5%.
The content summation of alkaline earth metal oxide BaO of the present invention, CaO and SrO is 12-40%, they have the microtexture of adjusting glass, improve the effect of glass physical and chemical performance, preferred content summation is 15-33%, wherein the content of BaO is that 5-15%, CaO are that 0-20%, SrO are 0-3%, particularly preferred content summation is 18-29%, and wherein the content of BaO is that 8-15%, CaO are that 8-18%, SrO are 0-1%.
Sb
2O
3Be the finings of glass, content is generally 0-0.5%, and too high levels is then greatly damaged platinum dish; Content hangs down the clarifying effect that do not have excessively.Preferred content is 0-0.3%; Be preferably 0-0.1% especially.
Table 1 is 9 embodiment of the present invention:
| 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | |
| SiO 2 | 20.5 | 21.5 | 23.0 | 23.0 | 25.0 | 28 | 40 | 20.5 | 32.5 |
| B 2O 3 | 11.4 | 10.4 | 8.6 | 10.2 | 5.5 | 5.5 | 14.7 | 18 | 14.3 |
| TiO 2 | 8.5 | 12.0 | 13.2 | 5.5 | 6.5 | 8.8 | 5.5 | 19.2 | 16.2 |
| Nb 2O 5 | 5.5 | 6.5 | 13.2 | 9.5 | 18.0 | 10.6 | 4.8 | 3.2 | 0 |
| ZrO 2 | 3.0 | 2.0 | 3.0 | 0 | 0 | 0 | 0 | 1.6 | 0 |
| CaO | 15.0 | 13.0 | 10 | 16 | 0 | 10 | 6 | 16 | 0 |
| BaO | 12.0 | 10.0 | 8.0 | 8 | 13.0 | 15.0 | 12.6 | 8.3 | 22.6 |
| SrO | 2.0 | 1.0 | 0 | 0 | 0 | 0 | 0 | 2.0 | |
| La 2O 3 | 18.0 | 23.0 | 18.0 | 24.7 | 28.5 | 22.0 | 15.1 | 13.1 | 11.8 |
| K 2O | 2.0 | 0.6 | 0 | 0 | 0 | 0 | 0 | 0 | |
| Na 2O | 2.0 | 3.0 | 3.0 | 3.0 | 2.5 | 0 | 1.2 | 0 | 1.5 |
| Sb 2O 3 | 0.05 | 0.05 | 0.05 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 | 0.1 |
| Nd | 1.7845 | 1.8158 | 1.8343 | 1.7462 | 1.7552 | 1.7980 | 1.7200 | 1.8350 | 1.7979 |
| Nf-Nc | 36.6 | 34.5 | 32.5 | 43.3 | 46.8 | 42.6 | 48.5 | 37.2 | 39.2 |
As can be seen from Table 1, do not contain PbO, As in the opticglass of the present invention
2O
3With the composition that GdO etc. pollutes environment, its optical index is: Nd:1.74-1.83, Nf-Nc:32-47.
Fig. 1 is the schema of the existing secondary material mode of production, and this production method comprises following a few step: batching; Fusion cast glass slag in single crucible; Check constant and group are criticized; Qualified glass slag is at tank furnace fusion cast glass liquid; Clarification; Homogenizing; Moulding; Annealing furnace annealing.
Fig. 2 is the schema that the present invention once changes the material mode of production, and the concrete steps of this production method are:
One: the raw material thorough mixing with preparing guarantees its homogeneity.
1) adopts quick moisture tester, strengthen the especially easily moisture monitoring of moisture absorption raw material of raw material, meet could using of opticglass raw material standard, defective forbidding; 2) batching adopts manual weighing technique, each weigh 15-250Kg; Weighing equipment uses high precision weighing equipment (as electronic scales), and precision is 0.01kg; 3) adopting the drum-type blending device to mix, is 15-40Min according to powder composition mixing time; 4) owing to be that artificial timing is reinforced, be the layering that reduces transportation, deposits process, adopt manual the stirring before each the feeding in raw material again.
Two: under 1150-1400 ℃ high temperature, be fused into glass metal with tank furnace of the present invention, make the specific refractory power consistence of glass metal good.
1) adopts automatic combustion control system, keep the oxidizing atmosphere and the automatic attemperation of combustion flame, guarantee that temperature of fusion and atmosphere meet the stability of processing requirement; 3) increase the specific refractory power number of times of testing the melting pool glass metal, per 2 hours once, in time proofreaies and correct in case of necessity.Adopt the different homologous series glass trade mark of specific refractory power or raw material to proofread and correct, guarantee to proofread and correct and expect not introduce to be corrected the composition that does not have in the glass; 4) use grid agitator.Fig. 3 is the grid agitator synoptic diagram, and the stirring theory of grid agitator is to rely on frame to stir and cut, because glass viscosity is very little, agitator resistance to rotation is very little, simultaneously the intensity of agitator material is bigger, so the rotating speed of agitator can suitably improve, and reaches as high as 80r/min.
Three: after the clarification of glass metal process and abundant homogenizing that specific refractory power is qualified, be shaped to the glass billot.
Four: the glass billot is annealed in annealing furnace.
The production method of once changing material is with respect to the advantage of the production method of secondary material: cancelled single crucible fusion cast glass slag link, the main purpose of this link is to guarantee glass metal specific refractory power consistence.The key that adopts tank furnace once to change the production method of material is, adopts an effective measure and guarantees the homogeneity of raw material to founding link from preparation raw material, and increase the consistence that supplementary unit improves the glass metal specific refractory power at fusion cast glass pendular ring joint.
Every technical indicator of the medium chromatic dispersion environment friendly heavy-lanthanide flint optical glass of the high refractive index that adopts production method of the present invention to produce all reaches technical target of the product, and optical transmittance is more excellent.With same raw material, adopt the H-LaF of the production method production of secondary material
3Colourity, interior all in the upper limit of OHARA standard, the H-LaF that adopts production method of the present invention to produce
3Colourity, interior all the lower limit of standard value (+10nm); With same raw material, adopt the H-ZLaF of the production method production of secondary material
56ABillot colourity, interior than the H-ZLaF that adopts production method of the present invention to produce
56AColourity, the about 10nm of interior height, at the lower limit of standard value (10nm).
Production unit of the present invention as shown in Figure 4, comprise tank furnace and annealing furnace, the molten pool of tank furnace links to each other with automatic combustion control system, and wherein the annexation of automatic combustion control system is according to this: natural gas inlet mouth, filtration voltage-regulation voltage-stabilization automatic cut-off system, natural gas flow measurement Controlling System, ratio regulation system; Combustion air inlet mouth, pressure regulation, voltage stabilizing, automatic cut-off system, combustion air flow measurement Controlling System, ratio regulation system; Wherein also have temperature controller between the melting pool of combustion air flow measurement Controlling System and tank furnace, described ratio regulation system is chewed with the burning of molten pool and is linked to each other.
Principle of work when production unit of the present invention is worked is: the ratio that configures natural gas and air on the ratio regulation system guarantees the abundant burning of natural gas, temperature controller is measured the actual temperature value of melting pool and is contrasted with set temperature value, send steering order and regulate the flow of natural gas to natural gas flow measurement Controlling System, the signal passing ratio regulation system of natural gas fluctuations in discharge is transferred to combustion air flow measurement Controlling System simultaneously, combustion air flow measurement Controlling System with the combustion air Flow-rate adjustment to being complementary with the natural gas flow, make the two flow reach set(ting)value, finally make temperature remain on set(ting)value, keep the stable of technology.
Claims (5)
1. environment friendly heavy-lanthanide flint optical glass, it is characterized in that: its weight percent consists of: SiO
2: 20-40%, B
2O
3: 5-20%, TiO
2: 5-20%, Nb
2O
5: 5-20%, ZrO
2: 0-3%, Sb
2O
3: 0-0.5%, La
2O
3: 10-30%, K
2O, Na
2O, BaO, CaO and SrO, wherein said K
2O and Na
2The summation of O content is 0-5%, and described BaO, CaO and SrO content summation are 12-40%.
2. environment friendly heavy-lanthanide flint optical glass as claimed in claim 1 is characterized in that: its weight percent consists of: SiO
2: 20-35%, B
2O
3: 6-17%, TiO
2: 7-15%, Nb
2O
5: 10-20%, ZrO
2: 0-3%, Sb
2O
3: 0-0.3%, La
2O
3: 10-25%, K
2O, Na
2O, BaO:5-15%, CaO:0-20%, SrO:0-3%, wherein said K
2O and Na
2The summation of O content is 0-5%, and described BaO, CaO and SrO content summation are 15-33%.
3. environment friendly heavy-lanthanide flint optical glass as claimed in claim 1 is characterized in that: its weight percent consists of: SiO
2: 20-28%, B
2O
3: 7-14%, TiO
2: 9-13%, Nb
2O
5: 10-20%, ZrO
2: 0-3%, Sb
2O
3: 0-0.1%, La
2O
3: 12-22%, K
2O, Na
2O, BaO:8-15%, CaO:8-18%, SrO:0-1%, wherein said K
2O and Na
2The summation of O content is 0-5%, and described BaO, CaO and SrO content summation are 18-29%.
4. the production method of the described environment friendly heavy-lanthanide flint optical glass of claim 1, it is characterized in that: this method may further comprise the steps: 1) with the raw material thorough mixing for preparing, guarantee its homogeneity; 2) under 1150-1400 ℃ high temperature, be fused into glass metal, make the specific refractory power consistence of glass metal good with tank furnace; 3) glass metal that specific refractory power is qualified is shaped to the glass billot through clarification with fully after the homogenizing; 4) the glass billot is annealed in annealing furnace.
5. the production method of environment friendly heavy-lanthanide flint optical glass as claimed in claim 4 is characterized in that: when carrying out described step 1, adopt quick moisture tester that the opticglass raw material is carried out the moisture monitoring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100225960A CN101003417B (en) | 2006-12-22 | 2006-12-22 | Environmental protective flint optical glass with heavy lanthanum and production method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100225960A CN101003417B (en) | 2006-12-22 | 2006-12-22 | Environmental protective flint optical glass with heavy lanthanum and production method |
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| Publication Number | Publication Date |
|---|---|
| CN101003417A CN101003417A (en) | 2007-07-25 |
| CN101003417B true CN101003417B (en) | 2011-05-11 |
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ID=38702853
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2006100225960A Active CN101003417B (en) | 2006-12-22 | 2006-12-22 | Environmental protective flint optical glass with heavy lanthanum and production method |
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| Country | Link |
|---|---|
| CN (1) | CN101003417B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105693081A (en) * | 2016-04-05 | 2016-06-22 | 湖北戈碧迦光电科技股份有限公司 | Optical glass and preparation method thereof, and optical element |
| CN110128007B (en) * | 2017-07-03 | 2022-07-15 | 成都光明光电股份有限公司 | Heavy lanthanum flint optical glass |
| CN109851217B (en) * | 2018-12-07 | 2022-03-08 | 成都光明光电股份有限公司 | Heavy lanthanum flint glass and prefabricated member, optical element and optical instrument thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1252391A (en) * | 1998-10-19 | 2000-05-10 | 肖特玻璃厂 | Lead-free optic glass |
| US6333288B1 (en) * | 1999-05-06 | 2001-12-25 | Schott Glas | Lead-free optical glasses |
| CN1772670A (en) * | 2005-09-23 | 2006-05-17 | 成都光明光电股份有限公司 | High refractivity high dispersion no-lead optical glass |
-
2006
- 2006-12-22 CN CN2006100225960A patent/CN101003417B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1252391A (en) * | 1998-10-19 | 2000-05-10 | 肖特玻璃厂 | Lead-free optic glass |
| US6333288B1 (en) * | 1999-05-06 | 2001-12-25 | Schott Glas | Lead-free optical glasses |
| CN1772670A (en) * | 2005-09-23 | 2006-05-17 | 成都光明光电股份有限公司 | High refractivity high dispersion no-lead optical glass |
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| Publication number | Publication date |
|---|---|
| CN101003417A (en) | 2007-07-25 |
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| C06 | Publication | ||
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| C14 | Grant of patent or utility model | ||
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| EE01 | Entry into force of recordation of patent licensing contract |
Application publication date: 20070725 Assignee: CDGM Glass Co., Ltd. Assignor: Chengdu Guangming Optoelectronics Co., Ltd. Contract record no.: 2014510000076 Denomination of invention: Environmental protective flint optical glass with heavy lanthanum, production method and equipment Granted publication date: 20110511 License type: Exclusive License Record date: 20140711 |
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