Chalcogenide glass preparation method and preparation device

A technology of chalcogenide glass and preparation equipment, which is applied in the field of chalcogenide glass preparation, can solve the problems of many internal stripe defects in chalcogenide glass, the small size of the prepared sample, and the difficulty of chalcogenide glass, so as to improve the practical level and improve the transparency of the chalcogenide glass. Good performance and optical uniformity

Active Publication Date: 2017-10-20
CHINA BUILDING MATERIALS ACAD
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  • Description
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Problems solved by technology

In addition, the preparation of traditional chalcogenide glass has a strong process specificity. It generally needs high-temperature swing melting in a cylindrical airtight quartz ampoule in an oxygen-free high vacuum atmosphere. The chalcogenide glass prepared by this method has internal streak defects. The size of chalcogenide glass prepared in the prior art is generally less than 100×100mm, and it is very difficult to prepare chalcogenide glass exceeding 100×100mm

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  • Chalcogenide glass preparation method and preparation device
  • Chalcogenide glass preparation method and preparation device
  • Chalcogenide glass preparation method and preparation device

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preparation example Construction

[0029] The embodiment of the present invention also proposes a method for preparing chalcogenide glass suitable for large size and high uniformity, preferably using the above-mentioned chalcogenide glass preparation device. The method includes the following three steps: vacuum low-temperature purification, under vacuum conditions, at the a temperature T 1 Purify the glass raw materials to remove impurities; vacuum high temperature melting, under vacuum conditions, at the second temperature T 2 The glass raw material is melted to obtain molten glass in a molten state; the leakage is formed, and the molten glass is leaked and shaped to obtain a finished glass; the vacuum condition is that the pressure is less than 1.0×10 -2 Pa. Preferably, the purity of the glass raw material is 5N grade. The selection of the glass raw material should meet the requirement that the final chalcogenide glass is composed of the following substances: one or both of Ge element and As element, and it...

example 1

[0035] According to germanium, selenium, and antimony elemental substances, the chalcogenide glass raw materials are weighed in the precise ratio of 28mol%, 60mol% and 12mol% respectively to make a mixture 1, and 200ppm of oxygen scavenger aluminum is introduced into the above mixture 1, and the mixture 1 is filled with Put into the quartz crucible 12 of vacuum melting furnace, carry out vacuumizing by vacuum melting furnace 17 positions, to 5 * 10 -3 Around Pa, the coil 14 starts to heat up, and the temperature rises to T within 0.5h 1 = 350°C purification for 2h. After the purification is completed, the temperature is raised rapidly: the temperature is raised to T at a speed of 10°C / min 2 =950°C, and kept at this temperature for 4h. At the beginning of heat preservation, introduce a quartz stirrer into the molten glass to homogenize the molten glass. The stirring speed is 10rpm / min. The stirring process system is: stirring for 10min, then standing for 20min, repeating 3 ti...

example 2

[0041] use attached figure 1 The shown device purifies molten Ge 20 Se 65 Sb 15 Glass raw material, take by weighing 5000g raw material and 100ppm of oxygen scavenger aluminum with the accurate proportioning ratio of 20mol%, 65mol% and 15mol% respectively according to germanium, selenium, antimony simple substance and use as mixture 1, put mixture 1 into the vacuum melting furnace In the quartz crucible 12, vacuumize to 6×10 through the vacuum melting furnace 17 positions - 4 About Pa, heat the coil 4, and raise the temperature to T within half an hour 1 = 300°C purification for 2h. Rapid temperature rise after purification: heat up to T at a rate of 8°C / min 2 =930°C, and kept at this temperature for 5h. During the heat preservation process, the molten glass is homogenized by a quartz mechanical stirring device, the stirring speed is 10rpm / min, and the stirring process system is: stirring for 20 minutes, then standing for 20 minutes, and repeating twice. After the heat...

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Abstract

The invention provides a preparation method and a preparation device for chalcogenide glass. The method comprises three steps: first, vacuum low-temperature purification: conducting purification on glass raw materials at a first temperature under a vacuum condition, so as to remove impurities; second, vacuum high-temperature melting: melting the purified glass raw materials at a second temperature under the vacuum condition, so as to obtain molten glass; third, material discharge and formation: discharging the molten glass, and forming a finished glass product, wherein the pressure of the vacuum condition is lower than 1.0*10<-2> Pa. The chalcogenide glass product prepared according to the three-step preparation method is high in optical homogeneity, excellent in spectrum penetration performance, and large in size.

Description

technical field [0001] The invention relates to a chalcogenide glass preparation method and a preparation device in a field, in particular to a chalcogenide glass preparation method and a preparation device suitable for large size and high uniformity. Background technique [0002] Infrared optical glass is a special glass material with infrared transmission properties. Compared with single crystal, polycrystalline and other crystalline infrared materials, it has the characteristics of good optical uniformity and easy preparation, especially for large-scale and special-shaped infrared devices. Forming and processing have become one of the focuses of research and application of infrared materials. [0003] 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. Compared with oxide glass, chalcogenide glass has larger mass and weaker bond s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C03B5/235
Inventor 赵华刘永华祖成奎韩滨陈江赵慧峰王衍行金扬利何坤
Owner CHINA BUILDING MATERIALS ACAD
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