A kind of synthetic method of li‑iii‑vi2 type mid-far infrared polycrystal

A synthesis method and far-infrared technology, applied in the growth of polycrystalline materials, chemical instruments and methods, crystal growth, etc., can solve the problems of troublesome quartz tube protection methods, inaccurate product stoichiometric ratio, etc., and reduce the probability of bursting. Effect

Active Publication Date: 2017-12-15
HEILONGJIANG INST OF TECH
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Problems solved by technology

[0003] The present invention aims to solve the technical problems of troublesome protection methods for quartz tubes and inaccurate product stoichiometric ratios when synthesizing Li-III-VI2 type mid-to-far infrared polycrystals, and provides a Li-III-VI2 type mid-to-far infrared polycrystalline crystal synthesis method

Method used

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  • A kind of synthetic method of li‑iii‑vi2 type mid-far infrared polycrystal
  • A kind of synthetic method of li‑iii‑vi2 type mid-far infrared polycrystal
  • A kind of synthetic method of li‑iii‑vi2 type mid-far infrared polycrystal

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specific Embodiment approach 1

[0017] Specific embodiment one: the synthetic method of the Li-III-VI2 type middle and far infrared polycrystal of the present embodiment, carry out according to the following steps:

[0018] 1. Soak the tubular crucible and quartz tube used for filling with aqua regia, then wash with ultrapure water, and dry for later use, wherein the tubular crucible is graphite crucible or PBN crucible;

[0019] Two, take the elemental raw material of Li-III-VI2 type mid-far infrared crystal, wherein the molar ratio of Li to the elemental element of the third main group is 1:1, and the molar ratio of Li to the elemental element of the sixth main group is 1:(2.000 ~2.002);

[0020] 3. Put Li and the element of the third main group into the tubular crucible, put the element of the sixth main group into the bottom of the quartz tube, then put the tubular crucible in the middle of the quartz tube; then vacuum the quartz tube to 10 -4 Pa-10 -6 Pa, the quartz tube is sealed with a hydrogen-oxyg...

specific Embodiment approach 2

[0022] Embodiment 2: This embodiment differs from Embodiment 1 in that the soaking time in aqua regia in step 1 is 4 to 6 hours. Others are the same as the first embodiment.

specific Embodiment approach 3

[0023] Specific embodiment 3: The difference between this embodiment and specific embodiment 1 or 2 is that the molar ratio of Li to the element of the sixth main group in step 2 is 1:2.001. Others are the same as those in Embodiment 1 or 2.

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Abstract

The invention provides a synthesis method of a Li-containing I-III-VI2 type mid and far infrared polycrystalline and relates to a synthesis method of the mid and far infrared polycrystalline. The synthesis method aims at solving the technical problem that existing quartz tubes for synthesizing the Li-containing I-III-VI2 type mid and far infrared polycrystalline are susceptible to corrosion cracking to produce burst. The synthesis method comprises the steps that 1, a tubular crucible and a quartz tube are cleaned; 2, an elementary-substance raw material of Li-containing I-III-VI2 type mid and far infrared crystals is weighed; 3, Li and a third main group element elementary substance are put into the tubular crucible, a sixth main group element elementary substance is put in the bottom of the quartz tube, then the tubular crucible is put in the middle of the quartz tube, vacuum pumping is performed to seal the quartz tube, and the quartz tube is put in an oblique single-temperature-zone tube type resistance furnace; 4, the resistance furnace is heated for synthesis, and the Li-containing I-III-VI2 type mid and far infrared polycrystalline is obtained. The synthesis method is safe and simple, reduces the probability of quartz tube burst in the synthesis process and can be used for synthesis of the lithium-containing mid and far infrared polycrystalline.

Description

technical field [0001] The invention relates to a method for synthesizing mid- and far-infrared polycrystals. Background technique [0002] Middle and far infrared nonlinear optical crystal elements have very important applications in military and civilian fields, such as: infrared guidance, infrared night vision, satellite tracking, laser weapons, atmospheric environment monitoring, etc. Mid-to-far infrared nonlinear optical single crystals are generally grown from polycrystals as raw materials. Existing mid-to-far infrared polycrystals such as LiGaS 2 , LiGaSe 2 ,LiGaTe 2 ,LiInS 2 ,LiInSe 2 , and LiInTe 2 The synthesis of PBN is carried out by horizontal single-temperature zone furnace synthesis or horizontal double-temperature zone method, that is, simple substances are directly added to graphite or boron nitride (PBN) boats, and then the boats are placed in quartz tubes and heated for synthesis. During the synthesis process, the volatile components in the raw mater...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B28/06C30B29/10C30B29/46
CPCC30B28/06C30B29/10C30B29/46
Inventor 马天慧张建交张红晨刘辉林鹏
Owner HEILONGJIANG INST OF TECH
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