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Method for developing potassium fluoroboric beryllium acid / sodium crystal through hydrothermal method

A technology of potassium fluoroboronate and single crystal is applied in the field of optoelectronic materials, and can solve the problems of difficulty in obtaining c-direction crystals, unfavorable applications, poor crystal quality and the like, and achieve the effects of being beneficial to application, low cost and simple process

Inactive Publication Date: 2007-10-10
TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the disadvantages that it is difficult to obtain thicker crystals in the c direction when using the molten salt method to grow potassium / sodium fluoroboryryllate single crystals, and the crystal quality is poor, which is not conducive to application, thereby providing a kind of energy Hydrothermal preparation method for growing large-sized potassium / sodium fluoroboryryllate single crystals, especially with large linearity in the c-direction, using crushed crystals as starting materials

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  • Method for developing potassium fluoroboric beryllium acid / sodium crystal through hydrothermal method

Examples

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Effect test

Embodiment 1

[0026]20 g of broken KBBF wafers obtained by spontaneous crystallization by the molten salt method (which are 10 mm × 20 mm × (2-3) mm KBBF grown by the molten salt method and broken to particles with a particle size of 2-4 mm) were used as nutrients, placed in In an autoclave with a gold-lined self-tightening seal structure with a reaction chamber size of 24mm×180mm, deionized water (ie, no mineralizer) was added to a fullness of 60%. A gold baffle with openings at the center and edges with a porosity of 7% is placed in the middle and lower part of the gold bushing to separate the raw material dissolution zone in the lower part from the growth zone in the upper part. The c-direction KBBF seed crystal is suspended on the top of the gold bushing, and the seed crystal is processed by molten salt method crystal growth. The gold bushing is then sealed and placed in an autoclave. In order to keep the internal and external pressure balance of the gold bushing, an appropriate amoun...

experiment example 2

[0028] 250 g of broken chips of KBBF obtained by spontaneous crystallization by the molten salt method (which are 10 mm × 20 mm × (2-3) mm KBBF grown by the molten salt method and broken to particles with a particle size of 2-4 mm) were used as nutrients, placed in The size of the reaction chamber is 42mm×760mm in an autoclave with a self-tightening seal structure with a gold lining, and the H 3 BO 3 47g is used as the mineralizer, and deionized water is added according to the fullness of 70%, so that the concentration of the deionized aqueous solution of the mineralizer is 2.0mol / L, and the pH value is 4.0. A gold baffle with openings at the center and edges with a porosity of 7% is placed in the middle and lower part of the gold bushing to separate the raw material dissolution zone in the lower part from the growth zone in the upper part. The c-direction KBBF seed crystal is suspended on the top of the gold bushing, and the seed crystal is processed by molten salt method ...

experiment example 3

[0030] 250 g of broken chips of KBBF obtained by spontaneous crystallization by the molten salt method (which are 10 mm × 20 mm × (2-3) mm KBBF grown by the molten salt method and broken to particles with a particle size of 2-4 mm) were used as nutrients, placed in In an autoclave with a self-tightening seal structure with a gold lining and a reaction chamber size of 60mm×1200mm, put KF90g as a mineralizer, and add deionized water at a fullness of 80% to make the mineralizer deionized The concentration of the aqueous solution is 1.0 mol / L, and the pH value is 8.0. A gold baffle with holes in the center and edges and a porosity of 10% is placed in the middle and lower part of the gold bushing to separate the raw material dissolution zone in the lower part from the growth zone in the upper part. The c-direction KBBF seed crystal is suspended on the top of the gold bushing, and the seed crystal is processed by molten salt method crystal growth. The gold bushing is then sealed a...

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Abstract

This invention relates to a hydrothermal method for growing KBBF / Na single crystal from crushed crystal. The method comprises: (1) placing crushed crystal of KBBF / Na as the nitrition medium at the bottom of a gold bushing, adding 0-2.0 mol / L deionized water or distilled water solution of mineralizer 60-80% of the gold bushing, and adjusting the pH value to 2.0-10.0; (2) hanging KBBF / Na seed crystal along c direction at the top of the gold bushing; (3) heating so that the average temperatures of the growth region and the dissolution region reach 300-450 deg.C and 400-500 deg.C, respectively, and the pressure less than or equal to 200 MPa; (4) growing for 10-90 days to obtain KBBF / Na single crystal. The method has such advantages as simple process, and better crustal quality than flux method. The length of the obtained KBBF / Na single crystal at C direction can reach cm level or higher.

Description

technical field [0001] The invention belongs to the field of optoelectronic materials, and in particular relates to a method for growing a potassium / sodium fluoroboryryllate single crystal by a hydrothermal method. Background technique [0002] Ultraviolet and deep ultraviolet all-solid-state coherent light sources are one of the most important goals pursued by human beings in the field of optoelectronics. Compared with other nonlinear optical materials, the main advantage of borate is that it still has high transmittance and high anti-light damage threshold in the deep ultraviolet region with a wavelength of 155nm, so that it can produce coherent light output in the deep ultraviolet region. Potassium fluoroborate beryllium (KBe) 2 BO 3 f 2 , hereinafter referred to as KBBF) is currently the only crystal that can directly double frequency to generate coherent light below 200nm. This feature makes the crystal have application prospects in the following aspects: on the one...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/22C30B7/10
Inventor 胡章贵陈创天刘有臣张昌龙王晓洋周卫宁
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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