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Infrared transparent rare earth-containing germanate glass and method of manufacturing the same

A germanate glass, infrared-transmitting technology, applied in the field of oxide glass, can solve the problems of high volatility of fluoride glass, resistance to devitrification, mechanical strength, thermal stability, poor chemical stability, and high refractive index

Inactive Publication Date: 2008-05-07
SHANGHAI INST OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, chalcogenide glass has the widest light transmission range, and its advantage is mainly in the far-infrared band (8-12 μm). However, chalcogenide glass is relatively difficult to prepare, the preparation process is complicated, and the cost is relatively high. low rate
The advantages of heavy metal oxide glass and fluoride glass are concentrated in the near and mid-infrared band (2-7μm). Fluoride glass has the advantages of low refraction, low dispersion, high transmittance, and low water content, and can be produced in large pieces Glass, but fluoride glass not only has poorer devitrification resistance, mechanical strength, thermal stability, and chemical stability than heavy metal oxide glass, but also fluoride glass volatilizes greatly under high temperature melting conditions

Method used

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  • Infrared transparent rare earth-containing germanate glass and method of manufacturing the same

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preparation example Construction

[0023] 2. The preparation method of the above-mentioned infrared-transmitting rare-earth germanate glass comprises the following steps:

[0024] a.a. Press La 2 o 3 1~10mol%, Na 2 CO 3 10~30mol%, NaF 2 1~10mol%, GeO 2 60-80mol% to calculate the weight percentage of each component, then weigh the raw materials and mix them uniformly;

[0025] b. Put the mixed raw materials into a platinum crucible for melting, the temperature is controlled at 1100-1200°C, and the melting time is 15-25 minutes;

[0026] c. After the raw materials are melted, the temperature is lowered to 1050-1150 ° C, and high-purity oxygen is introduced to remove water to obtain glass liquid;

[0027] d. Heat the molten glass to 1100-1200°C for clarification and homogenization, then pour the molten glass into a preheated mold to make clinker;

[0028] e. Put the clinker into a platinum crucible and refine it in a vacuum furnace, control the melting temperature to 1050-1150°C, and then pour the molten...

Embodiment 1

[0031] (1) Press La 2 o 3 2mol%, GeO 2 75mol%, Na 2 CO 3 24mol%, NaF 2 1mol% to calculate the weight percent of each component, then weigh the raw materials and mix them uniformly;

[0032] (2) Put the mixture into a platinum crucible for melting, the temperature is 1150°C, and the melting time is controlled at 20 minutes;

[0033] (3) After the glass is melted, the temperature is lowered to 1100°C, and high-purity oxygen is introduced to remove water for 10 minutes;

[0034] (4) Stop the ventilation of oxygen, heat up the molten glass to 1150°C for clarification and homogenization, then pour the molten glass into a preheated mould, to obtain clinker;

[0035] (5) Put the clinker into a platinum crucible and then transfer it to a vacuum furnace for refining. The melting temperature is 1150°C. The molten glass is then poured into preheated molds.

[0036] (6) Quickly put the glass into the muffle furnace that has been heated to the transition temperature (Tg), keep ...

Embodiment 2

[0039] (1) Press La 2 o 3 3mol%, GeO 2 72mol%, Na 2 CO 3 23mol%, NaF 2 2mol% to calculate the weight percent of each component, then weigh the raw materials and mix them uniformly;

[0040] (2) Put the mixture into a platinum crucible for melting, the temperature is 1150°C, and the melting time is controlled at 20 minutes;

[0041] (3) After the glass is melted, the temperature is lowered to 1100°C, and high-purity oxygen is introduced to remove water for 10 minutes;

[0042] (4) Stop the ventilation of oxygen, heat up the molten glass to 1150°C for clarification and homogenization, then pour the molten glass into a preheated mould, to obtain clinker;

[0043] (5) Put the clinker into a platinum crucible and then transfer it to a vacuum furnace for refining. The melting temperature is 1150°C. The molten glass is then poured into preheated molds.

[0044] (6) Quickly put the glass into the muffle furnace that has been heated to the transition temperature (Tg), keep ...

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Abstract

The invention discloses infra-red-transmitting rare earth germanate glass. Each component comprises the mole percentage of 1 to 10 percent of La2O3, 10 to 30 percent of Na2CO3, 1 to 10 percent of NaF2, and 60 to 80 percent of GeO2. The invention produces infra-red-transmitting oxygen fluorine nitrate glass through two steps of fusing methods, the transition temperature of the glass is 390 to 460 DEG C, the thermal stability parameter delta T is bigger than 100 DEG C, the infrared cut-off wavelength is bigger than 5.5microns, and the vickers hardness is bigger than 450, thereby the glass is applicable for producing infrared optical fiber and infrared materials.

Description

technical field [0001] The invention relates to an oxide glass, more specifically to a germanate glass containing rare earth and a preparation method thereof. Background technique [0002] Glasses whose light transmission wavelength exceeds 4 μm mainly include three types: one is heavy metal oxide glass, such as tellurate, germanate glass, etc.; the other is fluoride glass; the third is chalcogenide glass. Among them, chalcogenide glass has the widest light transmission range, and its advantage is mainly in the far-infrared band (8-12 μm). The rate is low. The advantages of heavy metal oxide glass and fluoride glass are concentrated in the near and mid-infrared band (2-7μm). Fluoride glass has the advantages of low refraction, low dispersion, high transmittance, and low water content, and can be produced in large pieces Glass, but fluoride glass not only has poorer devitrification resistance, mechanical strength, thermal stability, and chemical stability than heavy metal o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03C3/253
Inventor 房永征潘寅磊陈瑜叶永健薛欢张华罗志祥李晓吨施明王鋆文吕歆侃胡丽丽
Owner SHANGHAI INST OF TECH