Synthesis method of Li-containing I-III-VI2 type mid and far infrared polycrystalline

A technology of I-III-VI2 and synthesis method, which is applied in the synthesis field of mid-far infrared polycrystal, can solve the problems of troublesome quartz tube protection method, inaccurate product stoichiometric ratio, etc., and achieves the effect of reducing the probability of bursting

Active Publication Date: 2016-06-29
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 method and inaccurate product stoichiometric ratio of the quartz tube when synthesizing Li-containing I-III-VI2 type mid- and far-infrared polycrystals, and provides a Li-containing I-III -Synthetic method of VI2 type middle and far infrared polycrystal

Method used

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  • Synthesis method of Li-containing I-III-VI2 type mid and far infrared polycrystalline
  • Synthesis method of Li-containing I-III-VI2 type mid and far infrared polycrystalline
  • Synthesis method of Li-containing I-III-VI2 type mid and far infrared polycrystalline

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specific Embodiment approach 1

[0017] Specific embodiment one: the synthesis method of the Li-containing I-III-VI2 type mid-far infrared polycrystal of the present embodiment is carried 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] 2. Weigh the elemental raw materials of Li-containing I-III-VI2 type mid-to-far infrared crystals, wherein the molar ratio of Li to the elemental elements of the third main group is 1:1, and the molar ratio of Li to the elemental elements 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 ...

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 materi...

Claims

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Application Information

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Patent Type & Authority Applications(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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