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CN101318771A - Method for preparing rare earth doped transparent halide glass host material - Google Patents

Method for preparing rare earth doped transparent halide glass host material Download PDF

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Publication number
CN101318771A
CN101318771A CNA2008100586953A CN200810058695A CN101318771A CN 101318771 A CN101318771 A CN 101318771A CN A2008100586953 A CNA2008100586953 A CN A2008100586953A CN 200810058695 A CN200810058695 A CN 200810058695A CN 101318771 A CN101318771 A CN 101318771A
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glass
rare earth
preparation
glove box
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邱建备
宋志国
黄文静
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Kunming University of Science and Technology
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Kunming University of Science and Technology
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Abstract

The invention provides rare earth doped transparent halide glass used for three-dimensional optical data storage and a preparation method thereof. The invention is characterized in that the glass comprises the following compositions in mol percentage: 25 to 40 percent of AlF3, 5 to 65 percent of MF2, 1 to 15 percent of MX2, 10 to 20 percent of YF3, and 0.1 to 1 percent of ReF3, wherein, M represents one or a plurality of divalent alkaline earth ions of Mg<2+>, Ba<2+> and Sr<2+>; X is one or two kinds of ions of Br<-> and Cl <->; and Re is one or a plurality of trivalent rare earth ions of Sm<3+>, Tb<3+>, Eu<3+> and Ce<3+>. The transparent halide glass can be prepared after the compositions are melted in a high-frequency electric furnace for 10 to 45 minutes at a temperature of between 800 and 1,000 DEG C and are cooled under an atmosphere protection of chlorine or inert gas. The rare earth doped transparent halide glass reduces the threshold value of rare earth ion valence variation energy under the action of femtosecond laser in a glass medium, is more beneficial for information writing of the femtosecond laser, and reduces the absorption of an infrared band optical signal of a glass material, thereby having better illumination intensity.

Description

A kind of preparation method of rear-earth-doped transparent halide glass host material
Technical field
The present invention relates to the three-dimensional optical storage material technical field in the information technology, specifically a kind of preparation method who is used for femtosecond laser at the rear-earth-doped transparent halide split-phase glass host material of the three-dimensional light storage of transparent medium write-read.
Technical background
Femtosecond laser is because pulsewidth is very narrow, can be at the material absorbing laser energy, and finally pass in the characteristic time of lattice with the form of heat energy, will have in the energy injecting material zone selected of height space, the influence that realizes heat nanosecond and the picosecond laser hyperfine processing of material that is difficult to realize seldom.Simultaneously, even material does not originally exist intrinsic to absorb in the optical maser wavelength place, owing to have superelevation strength of electric field (~10 near the focus of focusing femtosecond laser 10V/cm), also can be because of nonlinearity responses such as induced with laser multiphoton absorption, multi-photon ionizations.Therefore, by femtosecond laser can the implementation space high selectivity the microstructure modification, and give the light function of material uniqueness.Last century the nineties, the respectable and morally lofty or upright grade in three Pus of Japan realizes the three-dimensional light storage by the micro-nano structure that femtosecond laser changes transparent medium, and the achievement in research of particularly utilizing ultra-short pulse laser to change the variation of glass middle-weight rare earths ionic valence condition allows people see the dawn of three-dimensional light memory deviceization.(A.Toriumi, S.Kawata, Reflectionconfocal microscope readout system for three-dimensional photochromic optical data storage.Opt Lett, 23 (1998) 1924.) the relevant result of study of utilizing femtosecond laser to realize containing the erasable three-dimensional light storage of realization of gold ion glass delivered of professor Qiu Jianrong of Zhejiang University.(J.Qiu,X.Jiang,C.Zhu,et?al.,Manipulation?of?gold?nanoparticles?insidetransparent?materials,Angew,Chem.Int.Ed.43(2004)2234.)
Because in theory, the higher cause of technical feasible degree, utilize femtosecond laser to change transparent medium and realize that the research of three-dimensional light storage mainly concentrates in the research that changes the rare earth ion valence state.In researchs such as Qiu, find, rare earth ion is not can both realize variation of valence in all glass, the composition of it and glass has very big relation, be that the polarizability of glass ingredient has overriding influence (J.Qiu to the rare earth ion variation of valence around the optical basicity of glass and the rare earth ion, M.shirai, T.Nakaya, et al., Space-selective precipation of silver nanoparticles inside glasses, Appl.Phys.Lett.81 (2002) 3040.).Make and utilize femtosecond laser to change glass middle-weight rare earths ionic valence condition realization three-dimensional light storage practicability, just must reduce the energy threshold of ionic valence condition variation, and this depends on glass material itself.In the glass system of selecting rare earth ion is had a reductibility its chemical stability often, physical strength etc. all relatively a little less than, therefore, the glass system that the reductibility of single phase is strong can not become the base mateiral of device.And for the glass system that generally rare earth ion is not had reductibility, the stability and the physical strength of glass are better, but glass matrix middle-weight rare earths ionic valence condition energy variation threshold value is higher usually, is unfavorable for that also femtosecond laser changes glass middle-weight rare earths ionic valence condition and realizes three-dimensional light storage practicability.
Halide glass has mechanical property preferably, be expected to be used for the three-dimensional information inscription of femtosecond laser, but the main component of this class glass is high-purity metal halide, metal halide has very strong water absorbability in air in preparation process, absorb airborne moisture easily and cause deliquescence, rotten, and introduce hydroxyl, influence the transparency and the mechanical property of the character of glass on the one hand, and the luminous intensity of rare earth ion; On the one hand, airborne oxygen also can react with metal halide, introduces hydroxyl in glass basis, thereby influences the character of glass in addition.
Summary of the invention
The purpose of this invention is to provide a kind of preparation method who is used for the rear-earth-doped transparent halide split-phase glass host material of the three dimensional optical information storage that femtosecond laser inscribes, realize information writing by the femtosecond laser effect, and overcome the shortcoming that rear-earth-doped transparent halogenide phase separation glass is influenced by extraneous preparation condition easily.
When affacting in the glass with femtosecond laser, compare with O, the F ion of rare-earth ion coordination, the easier electronics that provides of Cl, Br, and and produce electronics between rare earth and give and accept, make the rare earth ion reduction, thereby reduce the optical storage threshold value that changes based on ionic valence condition.The adulterated transparent halogenide phase separation glass material of novel rare-earth provided by the invention is by introducing halogenide (Cl in the high glass of the good physical strength of chemical stability, Br) phase, through the femtosecond laser focus irradiation, regional area is undergone phase transition, and make rare earth ion optionally enter into precipitated phase (second of introducing is principal constituent mutually), thereby reduce the energy threshold of rare earth ion variation of valence, both had advantages of excellent stability energy and physical strength, the substrate material that the rare earth ion valence state is changed easily, achievement of the present invention has extremely important meaning for the practical application of three-dimensional light storage.
Rear-earth-doped halide glass component mole percent level of the present invention is as follows:
AlF 3 25~40mol%
MF 2 5~65mol%
MX 2 1~15mol%
YF 3 10~20mol%
ReF 3 0.1~1mol%
Wherein, M represents the divalent alkaline-earth metal ION Mg 2+, Sr 2+, Ba 2+In one or more; X is Br -And Cl -In one or both; Re is trivalent rare earth ions Sm 3+, Tb 3+, Eu 3+And Ce 3+In the ion one or more, said components content percentage ratio sum is 100%.
The preparation method of rear-earth-doped halide glass:
Step 1: will form calculating, and take by weighing the component of fusion cast glass in glove box, wherein the purity of component material is not less than 99.95%, and with the said components thorough mixing, inserts in the plumbago crucible; Before operating, at first glove box is vacuumized processing, after vacuumizing, glove box body vacuum tightness is not higher than 1 * 10 -1Torr, limit case vacuum tightness is not higher than 5 * 10 -2Torr, oxygen is below the 100ppb and below the moisture value 1.47ppb; Feeding nitrogen or argon gas carry out atmosphere protection in above-mentioned vacuum suitcase then, and the air pressure of nitrogen or argon gas is identical with glove box air pressure on every side in the feeding glove box;
Step 2: in the above-mentioned glove box, the plumbago crucible of charging in high-frequency furnace, is rapidly heated to 800~1000 ℃ of insulations 10~45 minutes, makes raw materials melt become liquid, cooling obtains glass sample then; In addition, the MX as adding in the component 2In all or part of be MCl 2, in high-temperature firing glass process, can produce the stronger Cl of volatility 2Form and change glass, so the high-frequency furnace cavity domestic demand of burning glass feeds chlorine and carry out atmosphere protection, the airshed that wherein feeds chlorine is 2ml~20ml/ minute.
The present invention and the existing common rear-earth-doped glass material that is used for the femtosecond laser inscription and preparation method thereof the following outstanding advantage of comparing:
1) by halogens chlorine and bromide anion are introduced in the rear-earth-doped transparent fluorochemical phase-splitting glass, reduced in this glass medium the threshold value of rare earth ion variation of valence energy under the femtosecond laser effect, be beneficial to femtosecond laser more and carry out information writing;
2) because Cl and Br compare O, F lower phonon energy is arranged, relatively with simple fluoride glass, after the femtosecond laser effect, the rare earth ion in the halogenide phase-splitting is because the change in ligand field has better luminous intensity.
3) carry out the preparation process of halide glass in glove box, by vacuum tightness, the control of moisture and oxygen content reduces or has stopped airborne moisture, and oxygen has reduced the OH in the glass matrix to the influence of the glass of halogenide and formation thereof -Content has reduced the absorption of glass material infrared band optical signal, and the middle-weight rare earths ionic luminous intensity that has strengthened glass.
4) adopt high-frequency furnace (high frequency induction heating device) that halide glass is melted system, the characteristics that have being rapidly heated and lower the temperature have reduced the volatilization of halogenic ingredient, and surrounding environment such as air are to the influence of glass quality.
Further illustrate content of the present invention below in conjunction with embodiment, but these embodiment are not limitation of the present invention.
Embodiment
Embodiment 1:
Step 1: form 39AlF by mole per-cent 3-49.9MgF 2-1BaCl 2-10YF 3-0.1SmF 3, in glove box (Japanese ponding Mechanology Inc., MDB-2BL type), take by weighing component AlF 3, MgF 2, BaCl 2, YF 3And SmF 3The purity of above-mentioned raw materials is not less than 99.95%, the purity of above-mentioned raw materials is not less than 99.95%, and with the said components thorough mixing, insert in the plumbago crucible, wherein reached in the past in the operating process carrying out sample operation, and at first glove box was vacuumized, wherein glove box body vacuum tightness is not higher than 1 * 10 -1Torr, limit case vacuum tightness is not higher than 5 * 10 -2Torr, oxygen charges into the argon gas that is equal to air pressure with around atmospheric pressure then below the 100ppb and below the moisture value 1.47ppb in the glove box.
Step 2: the plumbago crucible of charging in above-mentioned glove box, is put into to use and put into small-sized high frequency induction heating device (Japan is beautiful and make institute, MU-1700C), is rapidly heated as for 800 ℃, feeds Cl simultaneously in the heating chamber of high frequency induction heating device 2Gas carries out atmosphere protection, and the airshed that wherein feeds chlorine is 2ml/ minute.Heat tracing 45 minutes makes raw materials melt become liquid, and cooling obtains glass sample then;
Embodiment 2
Step 1: form 35AlF by mole per-cent 3-49.5MgF 2-8BaCl 2-2MgBr 2-5YF 3-0.5TbF 3, in glove box (Japanese ponding Mechanology Inc., MDB-2BL type), take by weighing component AlF 3, MgF 2, BaCl 2, MgBr 2, YF 3, TbF 3, the purity of above-mentioned raw materials is not less than 99.95%, and with the said components thorough mixing, inserts in the plumbago crucible, wherein reaches in the past in the operating process carrying out sample operation, at first glove box is vacuumized, and wherein glove box body vacuum tightness is not higher than 1 * 10 -1Torr, limit case vacuum tightness is not higher than 5 * 10 -2Torr, oxygen charges into the argon gas that is equal to air pressure with around atmospheric pressure then below the 100ppb and below the moisture value 1.47ppb in glove box.
Step 2: in above-mentioned glove box, (Japan is beautiful and make institute, MU-1700C), is rapidly heated as for 900 ℃, feeds Cl simultaneously in the heating chamber of high frequency induction heating device to put into small-sized high frequency induction heating device with the plumbago crucible of charging 2Gas carries out atmosphere protection, and the airshed that wherein feeds chlorine is 6ml/ minute, and heat tracing 35 minutes makes raw materials melt become liquid, and cooling obtains glass sample then;
Embodiment 3:
Step 1: form 40AlF by mole per-cent 3-24MgF 2-15SrBr 2-20YF 3-1 EuF 3, in glove box (Japanese ponding Mechanology Inc., MDB-2BL type), take by weighing component AlF 3, MgF 2, SrBr 2, YF 3And EuF 3, the purity of above-mentioned raw materials is not less than 99.95%, and with the said components thorough mixing, inserts in the plumbago crucible, wherein reaches in the past in the operating process carrying out sample operation, at first glove box is vacuumized, and wherein glove box body vacuum tightness is not higher than 1 * 10 -1Torr, limit case vacuum tightness is not higher than 5 * 10 -2Torr, oxygen charges into the nitrogen that is equal to air pressure with around atmospheric pressure then below the 100ppb and below the moisture value 1.47ppb in the glove box.
Step 2: the plumbago crucible of charging is placed in the above-mentioned glove box, and (Japan is beautiful and make institute, MU-1700C), is rapidly heated to 950 ℃, feeds Cl simultaneously in the heating chamber of high frequency induction heating device to put into small-sized high frequency induction heating device 2Gas carries out atmosphere protection, and the airshed that wherein feeds chlorine is 15ml/ minute, and heat tracing 20 minutes makes raw materials melt become liquid, and cooling obtains glass sample then;
Embodiment 4:
Step 1: form 40AlF by mole per-cent 3-24MgF 2-15BaCl 2-20YF 3-1CeF 3, in glove box (Japanese ponding Mechanology Inc., MDB-2BL type), take by weighing component AlF 3, MgF 2, BaCL 2, YF 3And CeF 3, the purity of above-mentioned raw materials is not less than 99.95%, and with the said components thorough mixing, inserts in the plumbago crucible, wherein reaches in the past in the operating process carrying out sample operation, at first glove box is vacuumized, and wherein glove box body vacuum tightness is not higher than 1 * 10 -1Torr, limit case vacuum tightness is not higher than 5 * 10 -2Torr, oxygen charges into the nitrogen that is equal to air pressure with around atmospheric pressure then below the 100ppb and below the moisture value 1.47ppb in glove box.
Step 2: the plumbago crucible of charging is placed in the above-mentioned glove box, and (Japan is beautiful and make institute, MU-1700C), feeds Cl simultaneously in the heating chamber of high frequency induction heating device to put into small-sized high frequency induction heating device 2Gas carries out atmosphere protection, and the airshed that wherein feeds chlorine is 20ml/ minute, is rapidly heated to 1000 ℃ of heat tracings 10 minutes, makes raw materials melt become liquid, and cooling obtains glass sample then;
Embodiment 5:
Step 1: form 52AlF by mole per-cent 3-24MgF 2-3SrBr 2-20YF 3-1EuF 3, in glove box (Japanese ponding Mechanology Inc., MDB-2BL type), take by weighing component AlF 3, MgF 2, SrBr 2, YF 3And EuF 3, the purity of above-mentioned raw materials is not less than 99.95%, and with the said components thorough mixing, inserts in the plumbago crucible, wherein at first glove box is vacuumized before the sample operation carrying out, and wherein glove box body vacuum tightness is not higher than 1 * 10 -1Torr, limit case vacuum tightness is not higher than 5 * 10 -2Torr, oxygen charges into the nitrogen that is equal to air pressure with around atmospheric pressure then below the 100ppb and below the moisture value 1.47ppb in the glove box.
Step 2: the plumbago crucible of charging is placed in the above-mentioned glove box, and (Japan is beautiful and make institute, MU-1700C) to put into small-sized high frequency induction heating device, be rapidly heated to 950 ℃, heat tracing 20 minutes makes raw materials melt become liquid, and cooling obtains glass sample then.

Claims (4)

1. preparation method who is used for the transparent halogenide glass of three-dimensional light storage is characterized in that: the mole percent level that its one-tenth is grouped into:
AlF 3 25~40mol%
MF 2 5~65mol%
BaX 2 1~15mol%
YF 3 10~20mol%
ReF 3 0.1~1mol%
Wherein, M represents the divalent alkaline-earth metal ION Mg 2+, Ba 2+In one or more, Re is trivalent rare earth ions Sm 3+, Tb 3+, Eu 3+And Ce 3+In the ion one or more, X are represented univalent halide-ions Cl -And Br -In one or more;
Preparation according to the following steps:
Step 1:, charge in the glove box of nitrogen or argon gas atmosphere protection the component that weighing and the above-mentioned fusion cast glass of mixing need under low oxygen and the moisture content condition in high vacuum;
Step 2: in above-mentioned glove box, as holding raw material and melting the vessel of making glass, use the high-frequency furnace that is rapidly heated to melt system glass with the high purity graphite crucible, melting the material temperature is 800~1000 ℃, melt material constant temperature after 10~45 minutes, cooling obtains glass sample fast.
2. the preparation method who is used for the transparent halogenide phase separation glass of three-dimensional light storage according to claim 1 is characterized in that glove box body vacuum tightness is not higher than 1 * 10 -1Torr, limit case vacuum tightness is not higher than 5 * 10 -2Torr, oxygen are below 100ppb, below the moisture value 1.47ppb.
3. the preparation method who is used for the transparent halogenide phase separation glass of three-dimensional light storage according to claim 1, the purity that it is characterized in that used component raw material is higher than or equals 99.95%.
4. the preparation method who is used for the transparent halogenide phase separation glass of three-dimensional light storage according to claim 1, it is characterized in that mixing in the chlorine component glass process in preparation, the high-frequency furnace cavity domestic demand of burning glass feeds chlorine, and the airshed of chlorine is 2ml~20ml/ minute.
CNA2008100586953A 2008-07-18 2008-07-18 Method for preparing rare earth doped transparent halide glass host material Pending CN101318771A (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105283524A (en) * 2013-05-21 2016-01-27 中央硝子株式会社 Broadband emission material and white light emission material
CN107021622A (en) * 2017-03-29 2017-08-08 中国科学院西安光学精密机械研究所 Infrared glass preparation method and water removal device thereof
CN108881533A (en) * 2018-06-06 2018-11-23 北京小米移动软件有限公司 Terminal device
CN110334664A (en) * 2019-07-09 2019-10-15 中南大学 Statistical method, device, electronic equipment and the medium of phase fraction is precipitated in a kind of alloy
CN114133137A (en) * 2021-12-15 2022-03-04 中国建筑材料科学研究总院有限公司 Neutron detection glass scintillator and preparation method and application thereof

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105283524A (en) * 2013-05-21 2016-01-27 中央硝子株式会社 Broadband emission material and white light emission material
CN107021622A (en) * 2017-03-29 2017-08-08 中国科学院西安光学精密机械研究所 Infrared glass preparation method and water removal device thereof
CN108881533A (en) * 2018-06-06 2018-11-23 北京小米移动软件有限公司 Terminal device
CN110334664A (en) * 2019-07-09 2019-10-15 中南大学 Statistical method, device, electronic equipment and the medium of phase fraction is precipitated in a kind of alloy
CN110334664B (en) * 2019-07-09 2021-06-04 中南大学 Statistical method and device for alloy precipitated phase fraction, electronic equipment and medium
CN114133137A (en) * 2021-12-15 2022-03-04 中国建筑材料科学研究总院有限公司 Neutron detection glass scintillator and preparation method and application thereof
CN114133137B (en) * 2021-12-15 2023-10-20 中国建筑材料科学研究总院有限公司 Neutron detection glass scintillator and preparation method and application thereof

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