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Oxygen-fluorine tellurate glass and preparation method thereof

A technology of oxyfluorotellurite and glass, which is applied in glass manufacturing equipment, glass molding, manufacturing tools, etc., to achieve the effects of low preparation cost, great possibility, and great practical prospect

Inactive Publication Date: 2004-11-03
SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are very few reports on oxyhalogen tellurite glass systems
For TeO 2 -BaO-BaF 2 -La 2 o 3 -LaF 3 Glass system, no report yet

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1、2、3

[0024] In the first step, select high-purity raw materials (≥99.999%) according to Groups 1, 2, and 3 in Table 1;

[0025] The second step is to melt oxyfluorine tellurate glass. The melting process of the first, second and third groups of glasses is the same. 2 , BaO, La 2 o 3 and LaF 3 After the powdery raw materials are mixed evenly, put them in a quartz crucible and cover the crucible with a corundum or quartz plate. Cover a corundum or quartz plate on the crucible, put it in a silicon carbon rod electric furnace for melting, the melting temperature is 850-950 ℃, the raw material is completely melted, after homogenization and clarification, it is released at 700-800 ℃, and the glass liquid is poured in a preheated iron mold. Then quickly put the glass into the muffle furnace that has been heated to the material transition temperature (Tg) for annealing: first keep it warm for 2 hours, then lower the temperature by 100°C at a rate of 2-5°C / hour, and then close the muffl...

Embodiment 4、5

[0027] The first step is to select the glass formula and select high-purity raw materials according to the fourth and fifth groups in Table 1;

[0028] In the second step, the process of melting the 4th and 5th group of oxyfluorine tellurate glasses is basically the same as that of melting the 1st, 2nd and 3rd group of glasses. The annealing temperature and process of the glasses in groups 4 and 5 are basically the same as those in groups 1, 2 and 3.

Embodiment 6、7

[0030] The first step is to select the glass formula and select high-purity raw materials according to the sixth and seventh groups in Table 1;

[0031] In the second step, the melting and annealing process of the 6th and 7th group glasses is basically the same as that of the 1st, 2nd and 3rd group glasses. But because the glass composition contains more BaF 2 and LaF 3 , The melting temperature of glass is slightly lower, about 700°C. At the same time, in order to prevent the volatilization of fluoride components and improve the fluorination effect, in addition to the need to add a cover and crucible during the glass melting process, the glass component is added with a weight ratio of 58% NH 4 HF 2 .

[0032] The oxyfluorine tellurate glass obtained through the above preparation process is transparent and has excellent physical and chemical properties.

[0033] The transition temperature, softening temperature and melting temperature of the glass are determined according...

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PUM

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Abstract

The present invention is oxide-fluoride-tellurate glass with excellent heat stability and its preparation. The oxide-fluoride-tellurate glass has molar material composition of 70TeO2.(20-x)BaO.xBaF2.(10-y)La2O3.yLaF3, where x is 0-20 and y is 0-10. The oxide-fluoride-tellurate glass is prepared through melting process, is transparent a has no recrystallization. The oxide-fluoride-tellurate glass of the present invention has high heat stability and may be excellent glass substrate material for RE ion doped fiber.

Description

Technical field: [0001] The invention relates to an oxyfluorine tellurate glass with excellent thermal stability and a preparation method thereof. Background technique: [0002] In recent years, the application of tellurate glass in the field of optical communication, such as window materials, optical components, laser glass, communication optical fiber, etc., has attracted great interest. Tellurite glass has better mechanical strength, thermal stability and chemical stability than fluoride glass. Tellurate glass not only has a transmission range as wide as 6 μm, but also has a smaller phonon energy than ordinary oxide glass, and It has a refractive index larger than quartz glass and fluoride glass, and generally exceeds 2. Large refractive index and small phonon energy are very important and favorable for the radiative transition of rare earth ions in glass (see literature J.Mcdougall, D.B.Hollis, J.P.Payne, Phys.Chem.Glasses 37(1996)254) . [0003] Under normal conditio...

Claims

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Application Information

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IPC IPC(8): C03B5/02C03B19/02C03B25/00C03C3/12C03C3/23C03C3/247C03C13/04
CPCC03C3/23C03C13/04C03C3/122
Inventor 张军杰汪国年徐时清戴世勋胡丽丽
Owner SHANGHAI INST OF OPTICS & FINE MECHANICS CHINESE ACAD OF SCI
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