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Preparation method of chalcogenide glass

A chalcogenide glass and glass technology, applied in glass manufacturing equipment, glass furnace equipment, glass production, etc., can solve the problems of glass batch stability differences, non-continuous production, low production efficiency, etc., to reduce production costs, production The effect of cost reduction and efficiency improvement

Active Publication Date: 2016-11-16
CHINA BUILDING MATERIALS ACAD
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Problems solved by technology

[0004] At present, the atmosphere protection melting technology is used in the preparation method of chalcogenide glass, and the chalcogenide glass clinker is obtained by using the ampoule method, and the processes of feeding, glass formation, clarification, homogenization and leakage forming are completed sequentially at different times. However, this method cannot be continuously produced, and the production efficiency is still low, and raw materials are wasted, which increases the cost, and there are still certain differences in the stability of the obtained glass batches.

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  • Preparation method of chalcogenide glass

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preparation example Construction

[0032] like figure 1 As shown, one embodiment of the present invention proposes a kind of preparation method of continuous melting and leakage forming chalcogenide glass, which comprises the steps:

[0033] 1) Raw material weighing: According to the design ratio, weigh the required amount of glass raw materials in an anhydrous and oxygen-free glove box, and mix them to form a glass batch. The purity of the glass raw material used is higher than 99.999%, and the particle size of the material is 2-10mm; the weighed batch material is put into a quartz container and sealed. Further, an oxygen scavenger Al with a purity ≥ 99.999% is added to the glass batch material, and the doping amount is 0.05-0.1‰ of the total weight of the batch material;

[0034] 2) Purification of raw materials: Open the valve at the upper end of the quartz container, inject the required batch materials into the raw material purification and formation unit, vacuumize and heat the raw material purification a...

Embodiment 1

[0043] One embodiment of the present invention proposes continuous melting and blowout forming Ge 22 As 20 Se 58 Preparation method of chalcogenide glass.

[0044] (1) Raw material weighing: Prepare three batches with a total weight of 30kg in an anhydrous and oxygen-free environment, and add them to three sets of raw material purification-glass forming units respectively. The dimensions of the dehydroxylated quartz crucible used are Φ160mm*H400mm*δ5mm;

[0045] (2) Purification of raw materials: close the top and bottom discharge valves of the quartz crucible, vacuumize the quartz crucible and heat it outside, so that the temperature of the raw materials in the crucible reaches 320 °C, and the vacuum degree is less than 1×10 -2 Pa, continuous baking for 5 hours;

[0046] (3) Glass formation: close the quartz crucible and the external valve, further heat the batch material in the quartz crucible to 850°C, and keep it at this temperature for 20 hours to fully combine the gla...

Embodiment 2

[0052] One embodiment of the present invention proposes continuous melting and blowout forming Ge 28 Sb 12 Se 60 Preparation method of chalcogenide glass.

[0053] (1) Raw material weighing: Prepare three batches with a total weight of 30kg in an anhydrous and oxygen-free environment, and add them to three sets of raw material purification-glass forming units respectively. The dimensions of the dehydroxylated quartz crucible used are Φ160mm*H400mm*δ5mm;

[0054] (2) Purification of raw materials: close the top and bottom discharge valves of the quartz crucible, vacuumize the quartz crucible and heat it outside, so that the temperature of the raw materials in the crucible reaches 320 °C, and the vacuum degree is less than 1×10 -2 Pa, continuous baking for 5 hours;

[0055] (3) Glass formation: close the quartz crucible and the external valve, further heat the batch material in the quartz crucible to 860°C, and keep it at this temperature for 20 hours to fully combine the gla...

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Abstract

The invention relates to a preparation method of chalcogenide glass. The method comprises the following steps: 1) under anhydrous and anoxic conditions, weighing and mixing raw materials for the chalcogenide glass, transferring the mixture of raw materials to a raw material purification-glass forming unit, and purifying; 2) heating to 800-900 DEG C, insulating, fully reacting the glass raw materials to form a glass melt, introducing a protective gas, flowing the glass melt to a glass clarification-homogenization unit through a feeding pipe, mixing, sending the mixture into a glass homogenization-formation unit; 3) cooling to 400-500 DEG C, flowing out the evenly stirred glass melt through a bottom leakage pipe, so as to obtain a formed product; and 4) annealing to obtain the chalcogenide glass. The continuous production of raw material feeding, purification, glass formation, clarification, homogenization and formation improves the optical homogeneity, batch stability, yield and production efficiency of the chalcogenide glass.

Description

technical field [0001] The invention relates to the technical field of infrared glass preparation, in particular to a preparation method of chalcogenide glass. Background technique [0002] Chalcogenide glass refers to the glass formed by the elements of group VIA of the periodic table of elements S, Se, and Te as the main elements and a certain amount of other elements introduced. The currently widely used Ge-Sb-Se system chalcogenide glass has the following advantages: it has infrared transmission performance similar to that of single crystal germanium, and the transmission band covers three atmospheric windows; it has good light-thermal stability characteristics, and the refractive index The temperature coefficient is small and adjustable; the consumption of germanium resources is low, and it can be formed by precision molding technology, and the processing cost is low. [0003] It is widely used in national defense technology fields such as individual helmet night visio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C03B5/16C03B1/00C03C3/32C03C4/10
CPCY02P40/57C03B5/16C03B1/00C03C3/321C03C4/10
Inventor 刘永华祖成奎赵慧峰赵华韩滨王衍行陈江金扬利何坤
Owner CHINA BUILDING MATERIALS ACAD
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