Crystal of barium tellurium aluminate, preparation method and application

A technology of barium tellurium molybdate and crystal, which is applied in the field of crystal materials, can solve the problem of not being able to obtain single crystal particles, etc., and achieves the effects of easy operation conditions, low price, and realization of operation conditions.

Active Publication Date: 2009-08-05
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

According to the method reported in the existing literature, polycrystalline powder can be obtained but single crystal particles can not be obtained
In addition, so far, there are no reports on the growth and physical properties of this crystal at home and abroad, let alone the application of this single crystal as a nonlinear optical crystal.

Method used

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  • Crystal of barium tellurium aluminate, preparation method and application
  • Crystal of barium tellurium aluminate, preparation method and application
  • Crystal of barium tellurium aluminate, preparation method and application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] Raw material BaCO 3 , TeO 2 , MoO 3 Synthesize polycrystalline BTM0.1mol according to the molar ratio, and add TeO with a molar ratio of 1:0.2 2 —MoO 3 In the flux system, the molar ratio of polycrystalline BTM to flux is 2:3, put it into a platinum crucible with a volume of Φ70mm×80mm, heat up to 680°C to melt the raw materials, and mix them evenly; then cool down to the saturation point of the melt (520°C), at this time, put the preheated platinum wire (initial growth without seed crystal) into the melt, and lower the temperature at a cooling rate of 0.01-1°C / h to 510°C, and the growth cycle is 7 days. Platinum filaments can be proposed to obtain light yellow rod-shaped single crystals. Its X-ray diffraction pattern is measured, which is consistent with the theoretical calculation in the literature [J.AM.CHEM.SOC.2003, 125, 7764-7765], which proves that it is a monoclinic BTM single crystal.

[0039] The finely ground BTM single crystal powder is irradiated with ...

Embodiment 2

[0041] Raw materials BaO, TeO 2 , MoO 3 Synthesize polycrystalline BTM0.2mol according to the molar ratio, and add TeO with a molar ratio of 1:5 2 —MoO 3In the flux system, the molar ratio of polycrystalline BTM to flux is 1:1, put it into a platinum crucible with a volume of Φ70mm×80mm, heat up to 720°C to melt the raw materials, and mix them evenly; then cool down to the saturation point of the melt (515°C), at this time, put the preheated platinum wire into the melt, and lower the temperature at a cooling rate of 0.01 to 1°C / h until it reaches 505°C, and the growth cycle is 10 days. It is proposed that the platinum wire can be light yellow Block single crystal (4×3×3mm 3 ). Its X-ray diffraction pattern is measured, which is consistent with the theoretical calculation in the literature [J.AM.CHEM.SOC.2003, 125, 7764-7765], which proves that it is a monoclinic BTM single crystal.

[0042] Grinding the BTM single crystal obtained in Example 2 into powder, using a Nd:YAG ...

Embodiment 3

[0046] The raw material Ba(OH) 2 , TeO 2 , MoO 3 Synthesize polycrystalline BTM0.2mol by molar ratio, add pure MoO 3 For the flux system, the molar ratio of polycrystalline BTM and flux is 1:3, put it into a platinum crucible with a volume of Φ70mm×80mm, heat up to 810°C to melt the raw materials, and mix them evenly; then cool down to the saturation of the melt point (510°C), at this time, put the preheated BTM seed crystal into the melt, set the pulling control parameters, speed: 5~50rd; intermittent time: 5~50s; acceleration time: 1~5s; running time : 30-300s; and cooling at a cooling rate of 0.05-5°C / d, down to 500°C, and a growth cycle of 8 days, it is proposed that platinum wire can obtain a light yellow rod-shaped single crystal (attached figure 2 )(11×4×2mm 3 ).

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Abstract

Barium tellurium molybdate crystal and its preparation method and application. The chemical formula of the crystal is BaTeMo2O9, it belongs to the monoclinic crystal system, the space group is P21, and it is prepared by flux method. Add BaTeMo2O9 polycrystalline powder into a suitable flux system TeO2-MoO3, MoO3, TeO2, B2O3 or PbO-B2O3, put it into a platinum crucible, raise the temperature to completely melt the raw materials, and mix thoroughly; then cool down to the saturation point of the melt, and then Inserting the seed crystal and cooling the growth can obtain a nonlinear optical crystal BTM single crystal with a length of more than 10 mm and a thickness of more than 5 mm with a single phase. The crystal has a strong frequency doubling effect, the infrared absorption edge is greater than 5000nm, has high stability, does not decompose at room temperature, does not deliquesce, etc.; it can be used in nonlinear optics, electro-optic and piezoelectric fields; the operating conditions of this method are easy to realize , and the raw materials are easy to get and the price is cheap.

Description

technical field [0001] The invention relates to the preparation and application of a novel nonlinear optical crystal, in particular to the preparation and application of barium tellurium molybdate (abbreviated as BTM) crystal, and belongs to the technical field of crystal materials. Background technique [0002] Since Franken first discovered the crystal nonlinear optics (hereinafter referred to as NLO) effect in 1962, in just over 40 years, the development of NLO materials has advanced by leaps and bounds, and continues to develop at a rapid pace. In the optoelectronic industry (optical communication, optical information processing, storage and holography, optical computer, laser weapon, laser precision machining, laser chemistry, laser medicine, etc.) to be realized in the 21st century, NLO materials are the basic materials. With the further development and application of laser technology, the requirements for the performance of NLO crystal materials are becoming more and ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/32C30B11/00H01S3/16
Inventor 陶绪堂张卫国张承乾蒋民华
Owner SHANDONG UNIV
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