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Bismuth tellurium borate compound, bismuth telluride borate nonlinear optical crystal, bismuth telluride borate scintillation crystal, preparation method and application

A technology of bismuth tellurium borate and scintillation crystals, applied in nonlinear optics, chemical instruments and methods, optics, etc., can solve the problems of expensive Lu elements, high growth temperature, etc., achieve wide transmission range, high electro-optic coefficient, and good mechanical properties Effect

Active Publication Date: 2017-10-10
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

Although the above crystals have some excellent scintillation properties, there are also some disadvantages that limit their applications, such as LaBr 3 Due to its hygroscopic properties, Lu 2 SiO 5 Contains expensive Lu elements and grows at a high temperature

Method used

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  • Bismuth tellurium borate compound, bismuth telluride borate nonlinear optical crystal, bismuth telluride borate scintillation crystal, preparation method and application
  • Bismuth tellurium borate compound, bismuth telluride borate nonlinear optical crystal, bismuth telluride borate scintillation crystal, preparation method and application
  • Bismuth tellurium borate compound, bismuth telluride borate nonlinear optical crystal, bismuth telluride borate scintillation crystal, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] Example 1 Preparation of polycrystalline Bi 3 TeBO 9 Compound

[0044] Prepared by solid phase reaction method, the reaction equation is 3Bi 2 O 3 +2TeO 2 +2H 3 BO 3 =2Bi 3 TeBO 9 ; The ratio of the above three reagents: Bi 2 O 3 (13.977g, 0.03mol), TeO 2 (3.192g, 0.02mol), H 3 BO 3 (1.237g, 0.02mol); the specific preparation steps are: weigh the reagents according to the above dosages, put them in a mortar, grind and mix them, then put them into a platinum crucible, put them in a muffle furnace, and The temperature is increased to 500℃ for pre-sintering at a rate of ℃ / h, and the temperature is kept for 24h, and then cooled. After cooling, the sample is taken out, re-ground and mixed, and then placed in a muffle furnace at 700℃ for 48h to obtain polycrystalline Bi 3 TeBO 9 Compound, Bi 3 TeBO 9 The XRD pattern of the compound is as figure 2 Shown.

Embodiment 2

[0045] Example 2 Preparation of Bi by flux method 3 TeBO 9 Nonlinear optical crystal

[0046] Use TeO 2 As a flux, the molar ratio of solute to flux is 1:0.5. Weigh 279.54g Bi 2 O 3 (0.6mol), 24.74g H 3 BO 3 (0.4mol) and 47.88g TeO 2 (0.3mol), after grinding and mixing in a mortar, melted into a crucible of Φ60mm×60mm in batches; put the crucible after dissolving into a vertical crystal growth furnace, heated to 800℃, and stirred at constant temperature After 48h, the temperature is then lowered to 5°C above the saturation point, the seed crystal is introduced to cool down at a rate of 1°C / day, and the rotation speed is 15r / min to start the crystal growth. After the crystal growth is completed, the seed rod is lifted to lift the crystal out of the liquid Then, the temperature is reduced to room temperature at a rate of 30℃ / h to obtain a transparent Bi 3 TeBO 9 Non-linear optical crystal.

Embodiment 3

[0047] Example 3 Preparation of Bi using flux top seeding method 3 TeBO 9 Nonlinear optical crystal

[0048] Use TeO 2 -B 2 O 3 As a flux, the molar ratio of solute to flux is 1:1:0.5. Weigh 559.08gBi respectively 2 O 3 (1.2mol), 98.93g H 3 BO 3 (1.6mol) and 255.36g TeO 2 (1.6mol), after grinding and mixing in a mortar, melt it in batches and put it into a Φ70mm×70mm crucible; put the crucible after dissolving into a vertical crystal growth furnace, heat up to 750℃, stir at constant temperature After 48h, the temperature is then lowered to 10℃ above the saturation point, the seed crystal is introduced, the seed crystal is just in contact with the liquid surface, and then the temperature is lowered at a rate of 0.5℃ / day, and the rotation speed is 25r / min to start crystal growth. After the crystal growth ends , The crystal is lifted from the liquid surface, and then the temperature is reduced to room temperature at a rate of 20℃ / h to obtain a transparent Bi 3 TeBO 9 Non-linear opti...

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Abstract

The invention discloses a (Bi1-x-yLnxCey)3TeBO9 compound, (Bi1-x-yLnxCey)3TeBO9 nonlinear optical crystal, (Bi1-x-yLnxCey)3TeBO9 scintillation crystal, a preparation method and an application thereof. The compound crystal with its chemical formula being Bi3TeBO9 is a non-centrosymmetrical structure and belongs to the hexagonal system, and space group is P63. The invention also discloses (Bi1-x-yLnxCey)3TeBO9 compound crystal doped with different rare earth elements, wherein Ln=La-Lu or Y; X is less than 1 and greater than or equal to 0; and Y=0 or Y is less than or equal to 0.2 and greater than or equal to 0.0001. By a flux method, high-quality and large-sized (Bi1-x-yLnxCey)3TeBO9 crystal can grow, has good mechanical property is good, is deliquescence-free, and can be used for manufacturing nonlinear optical devices. A laser manufactured by the use of the crystal can be used in fields of spectroscopy, biomedicine, military and the like. The material of the invention also can be used as high-density fast-attenuation scintillation crystal.

Description

Technical field [0001] The invention relates to the field of artificial lenses. More specifically, it relates to a bismuth telluride borate compound, a bismuth telluride borate non-linear optical crystal, a bismuth tellurium borate scintillation crystal, and a preparation method and application thereof. Background technique [0002] With the development of laser technology, lasers of different wavelengths are in great demand in different fields of national economy and people's livelihood, such as national defense, medical treatment, communications, lithography, and laser processing. Frequency doubling is a method often used in laser technology to change the output wavelength of a laser beam. It usually uses a special nonlinear optical crystal placed in front of the laser beam to change the output wavelength of the laser beam. At present, the commonly used nonlinear optical crystal materials mainly include KDP (KH 2 PO 4 ), KTP (KTiOPO 4 ),BBO(β-BaB 2 O 4 ) And LBO (LiB 3 O 5 ) ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/46C30B9/12G02F1/355
CPCC30B9/12C30B29/46G02F1/3551
Inventor 夏明军李如康
Owner TECHNICAL INST OF PHYSICS & CHEMISTRY - CHINESE ACAD OF SCI
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