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Method for synthesizing LBO (Lithium Triborate) crystal growing raw material and method for preparing LBO crystal

A synthesis method and crystal growth technology, applied in the directions of crystal growth, single crystal growth, single crystal growth, etc., can solve the problems of deviation of reaction raw material components, easy cracking of crystals, easy occurrence of inclusions, etc., and avoid the deviation of material components. , avoid volatilization, improve the effect of crystal quality

Active Publication Date: 2014-05-28
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

LBO crystals are generally grown by high-temperature solution method, and solid-phase synthesis growth raw materials are used. Since the solid-phase synthesis growth raw materials need to be carried out at high temperature, the volatilization of the materials will cause the deviation of the reaction raw material components, making it difficult to grow LBO crystals. The grown crystals are in It is easy to crack during the extraction process and the obtained crystals are prone to defects such as inclusions

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] Moore Billy 2 MoO 4 :H 3 BO 3 =1:5 ratio weighs 869.15g Li 2 MoO 4 and 1545.75g H 3 BO 3 Add it to 100°C deionized water, stir to dissolve it.

[0025] The dissolved solution is placed in an evaporating dish and heated to evaporate the water in the solution to obtain a milky product.

[0026] Put the emulsion into an oven, dry it at 130°C for 5 hours, and then take it out. The raw material for growth was obtained after thorough grinding in an agate mortar and placed in a platinum crucible. Sintering at a constant temperature of 400° C. for 10 hours in a muffle furnace to obtain a sintered body. After cooling, put it into a vertical resistance wire crystal growth furnace, rapidly raise the temperature to 900°C and wait for the material to completely melt, then use a stirring paddle made of platinum sheet to stir at this temperature for 24 hours, and when the melt is fully uniform, take it out and stir paddle. Rapid cooling to 740°C. Keep warm for an hour. Lo...

Embodiment 2

[0028] Moore Billy 2 MoO 4 :H 3 BO 3 =1:5.5 ratio weighs 869.15g Li 2 MoO 4 and 1700.32g H 3 BO 3 Add it to 100°C deionized water, stir to dissolve it.

[0029] The dissolved solution is placed in an evaporating dish and heated to evaporate the water in the solution to obtain a milky product.

[0030] Put the emulsion into an oven, dry it at 150°C for 5 hours, and then take it out. The raw material for growth was obtained after thorough grinding in an agate mortar and placed in a platinum crucible. Sintered at a constant temperature of 420° C. for 10 hours in a muffle furnace to obtain a sintered body. After cooling, put it into a vertical resistance wire crystal growth furnace, rapidly raise the temperature to 800°C and wait for the material to completely melt, then use a stirring paddle made of platinum sheet to stir at this temperature for 24 hours, and when the melt is fully uniform, take it out and stir paddle. Rapid cooling to 737°C. Keep warm for an hour. L...

Embodiment 3

[0032] Moore Billy 2 MoO 4 :H 3 BO 3 =1:6 ratio weighs 869.15g Li 2 MoO 4 and 1854.9g H 3 BO 3 Add to 100°C deionized water. Stir to dissolve it.

[0033] The dissolved solution is placed in an evaporating dish and heated to evaporate the water in the solution to obtain a milky product.

[0034] Put the emulsion into an oven, dry it at 150°C for 5 hours, and then take it out. The raw material for growth was obtained after thorough grinding in an agate mortar and placed in a platinum crucible. Sintering at a constant temperature of 450° C. for 10 hours in a muffle furnace to obtain a sintered body. After cooling, put it into a vertical resistance wire crystal growth furnace, quickly raise the temperature to 800°C and keep it for 5 hours. After the material is completely melted, use a stirring paddle made of platinum sheet to stir at this temperature for 24 hours until the melt is fully uniform. After that, remove the stirring paddle. Rapid cooling to 733°C. Keep wa...

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Abstract

The invention belongs to the technical field of crystal growth, and provides a method for synthesizing an LBO (Lithium Triborate) crystal growing raw material. The method comprises the following steps: adding Li2MoO4 and H3BO3 into deionized water of 100 DEG C to prepare a cream object, drying and grinding the cream object into powder to obtain a growing raw material, and further sintering to obtain a sintered body. The invention further provides a method for preparing an LBO crystal. The method comprises the following steps: putting the sintered body into a crystal growing furnace, raising the temperature till the sintered body is molten, stirring the solution, cooling the solution till the temperature is 5-10 DEG C higher than a saturation point temperature, so as to obtain a uniformly mixed melt, preheating a seed crystal, subsequently slowly introducing into the crystal growing furnace to enable the seed crystal to start to grow slowly at the cooling rate of 0.1 to 1 DEG / day when the seed crystal is neither molten nor grows after 24 h; after the crystal growth is accomplished, taking out the crystal from the melt, cooling down to be at the room temperature, and taking out so as to prepare the LBO crystal. According to the method, the reaction components are prevented from deviation at high temperature in solid phase synthesis, the grown LBO crystal is good in quality and free of crystal defect such as inclosure.

Description

technical field [0001] The invention belongs to the technical field of crystal growth, in particular to a method for synthesizing LBO crystal growth raw materials and a method for preparing LBO crystals. Background technique [0002] Lithium triborate (LiB 3 o 5 , referred to as LBO) is a nonlinear optical crystal with superior performance discovered by the Chen Chuangtian group of the Fujian Institute of the Structure of Matter, Chinese Academy of Sciences. It not only has a large nonlinear coefficient, a high resistance to laser damage threshold, a wide transmission range, Small matching angle and walk-off angle, and can achieve phase matching at room temperature, no deliquescence, stable chemical properties. At present, LBO crystals are mainly used in the field of solid-state laser frequency conversion, and can be used for double and triple frequency of Nd:YAG and Nd:YLF. [0003] LBO crystal is a peritectic compound with a decomposition temperature of 834±4°C. LBO cr...

Claims

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Application Information

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IPC IPC(8): C30B29/22C30B17/00C01B35/12
Inventor 胡章贵杨蕾岳银超
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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