Crystal of barium tellurium aluminate, preparation method and application

A technology of barium tellurium molybdate and crystals, which is applied in the field of crystal materials, can solve the problems of not being able to obtain single crystal particles, and achieve the effect of easy operation conditions, realization of operation conditions, and low price

Active Publication Date: 2007-05-09
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, ...

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 BTM 0.1mol according to the molar ratio, 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 Nd:...

Embodiment 2

[0041] Raw materials BaO, TeO 2 , MoO 3 Synthesize polycrystalline BTM0.2mol according to the molar ratio, add TeO with a molar ratio of 1:5 2 -MoO 3 In 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 lase...

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 to 300s; and cooling at a cooling rate of 0.05 to 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 (attachment 2) (11×4×2mm 3 ).

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Abstract

This invention discloses a method for preparing BaTeMo2O9 crystal and its application. The crystal belongs to monoclinic system, and the space group is P21. The method comprises: adding BaTeMo2O9 polycrystalline powder into appropriate fluxing agent system (TeO2-MoO3, MoO3, TeO2, B2O3 or PbO-B2O3), placing in a Pt crucible, heating to melt the raw materials, mixing adequately, cooling to the melt saturation point, adding seed crystals, and growing homogeneous nonlinear optical BaTeMo2O9 single crystal with lengths exceeding 10 mm and thickness exceeding 5 mm. The obtained BaTeMo2O9 single crystal has strong frequency multiplification effect and IR absorption edge greater than 5000 nm, and has such advantages as high stability, no decomposition at room temperature, and no deliquescence. The crystal has nonlinear optical, electro-optical and piezoelectric applications. The method has such advantages as easy operation,and abundant raw materials.

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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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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