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Synthetic method of LiGaS2 polycrystalline

A synthesis method and technology of quartz tubes, applied in polycrystalline material growth, chemical instruments and methods, single crystal growth, etc., can solve problems such as quartz tube bursting, and achieve the effect of reducing corrosion

Active Publication Date: 2013-06-19
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention is to solve the existing LiGaS 2 During the synthesis of polycrystalline raw materials, due to the high pressure generated by the synthetic raw materials at high temperature and the corrosion of lithium-containing compounds, the quartz tubes used in the synthesis burst due to technical problems, and LiGaS 2 Polycrystalline Synthesis Method

Method used

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  • Synthetic method of LiGaS2 polycrystalline

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specific Embodiment approach 1

[0009] Specific implementation mode 1: LiGaS in this implementation mode 2 The polycrystalline synthesis method is carried out as follows: 1. Rinse the short quartz tube with a length of 30cm to 40cm and the long quartz tube with a length of 50cm to 60cm, boron nitride boat and graphite crucible with deionized water, and then immerse Soak in aqua regia for 10h to 24h, rinse with deionized water, and dry; 2. Put the long quartz tube treated in step 1 into a horizontal resistance furnace with a temperature of 950°C to 1050°C, and the nozzle is outside the furnace. Seal it with an aluminum plug, and then pass high-purity argon gas to remove the air in the quartz tube. After the air is exhausted, pass argon gas into high-purity acetone, and the argon mixed with acetone vapor overflowing from high-purity acetone Gas is passed into the quartz tube for 25 minutes to 40 minutes, and then high-purity argon gas is introduced into the quartz tube, and the horizontal resistance furnace is...

specific Embodiment approach 2

[0011] Embodiment 2: This embodiment differs from Embodiment 1 in that: the high-purity argon in steps 2 and 3 is argon with a purity ≥ 99.999% (volume fraction). Others are the same as in the first embodiment.

specific Embodiment approach 3

[0012] Embodiment 3: This embodiment is different from Embodiment 1 or 2 in that: the high-purity acetone described in Step 2 and Step 3 refers to chromatographically pure acetone. Others are the same as in the first or second embodiment.

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Abstract

A synthetic method of LiGaS2 polycrystalline relates to the synthetic method of polycrystalline. The invention has solved the technical problem that quartz tubes used for synthesis crack due to high pressure generated from synthesis raw materials at high temperature as well as the corrosion of Li-containing compounds during present synthetic processes of LiGaS2 polycrystalline raw materials. The synthetic method provided by the invention comprises the following steps of: placing a long quartz tube and a graphite crucible into a high-temperature horizontal electric resistance furnace, and allowing argon mixed with acetone steam to enter so as to cover inner walls of the long quartz tube and the graphite crucible with a layer of cracked carbon; firstly allowing gallium and lithium to undergo a high temperature reaction in a horizontal one-temperature tubular electric resistance furnace to obtain a LiGa alloy; placing the LiGa alloy and sulfur into the graphite crucible, the inner wall of which is covered with the cracked carbon, placing the graphite crucible into the long quartz tube, the inner wall of which is covered with the cracked carbon, placing into a vertical electric resistance furnace after melting and sealing, carrying out a heating reaction on one high-temperature end of the graphite crucible to obtain the LiGaS2 polycrystalline. The long quartz tube will not crack during the reaction process. The LiGaS2 polycrystalline prepared in the invention can be used to prepare monocrystalline.

Description

technical field [0001] The present invention relates to a method for synthesizing polycrystals. Background technique [0002] In the field of laser application, people have always hoped to obtain a laser light source that can be continuously adjusted from the ultraviolet region to the infrared region, using nonlinear optical crystals, using its second-order nonlinear optical effects (frequency doubling, sum frequency, difference frequency) , Optical parametric oscillation, etc.), made of nonlinear optical devices such as second harmonic generators, frequency converters, optical parametric oscillators, etc., can expand the tunable range of lasers. At present, nonlinear optical crystal materials in the visible and ultraviolet regions can meet the needs of practical applications. However, in the field of infrared light, especially in the mid-infrared region of 3-20 μm, there is still a lack of large-sized and effective nonlinear optical crystals with high-quality performance. ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/46C30B28/02
Inventor 杨春晖马天慧孙亮
Owner HARBIN INST OF TECH