Large size nonlinear optical crystal lead bromoborate, and preparation and use thereof

A technology of nonlinear optics and lead borate, applied in nonlinear optics, chemical instruments and methods, optics, etc., can solve problems such as crystals that cannot be purchased in the market

Inactive Publication Date: 2009-05-20
XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But to test the basic physical properties (also including nonlinear optical properties) of a crystal, the size of the crystal needs to be a single crystal of several millimeters or even centimeters, and there is no relevant preparation of Pb with a size sufficient for physical testing. 2 B 5 o 9 The report of Br single crystal, more can't buy this crystal on the market, the present invention aims at preparing the Pb with certain size 2 B 5 o 9 Br single crystal, and test its basic physical properties

Method used

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  • Large size nonlinear optical crystal lead bromoborate, and preparation and use thereof
  • Large size nonlinear optical crystal lead bromoborate, and preparation and use thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] Take reaction formula (1) as an example, but not limited to reaction formula (1);

[0034] According to the equation PbO+H 3 BO 3 +HBr→Pb 2 B 5 o 9 Br+H 2 O ↑ synthesis of Pb 2 B 5 o 9 Br compound, concrete operation steps are as follows:

[0035] PbO, H 3 BO 3 , HBr acid was put into a mortar with a stoichiometric ratio of 2:5:1, mixed and carefully ground, then put into a Φ200mm×200mm open corundum crucible, pressed it tightly, put it into a muffle furnace, and slowly heated up to 400°C, constant temperature for 5 hours, exhaust the gas as much as possible, take out the crucible after cooling, grind the sample evenly, then put it in the crucible, keep the temperature in the muffle furnace at 520°C for another 5 hours, wait for the temperature to drop to room temperature and then take it out , grind carefully, keep the temperature at 520°C for 24 hours again, put it into a mortar after cooling, and grind it lightly to get completely sintered Pb 2 B 5 o 9 ...

Embodiment 2

[0039] Take reaction formula (2) as an example, but not limited to reaction formula (2).

[0040] According to the equation PbO+B 2 o 3 +HBr→Pb 2 B 5 o 9 Br+H 2 O ↑ synthesis of Pb 2 B 5 o 9 Br compound, specific operation steps are carried out according to embodiment 1;

[0041] The synthesized Pb 2 B 5 o 9 Br compound and flux NaF and PbO molar ratio Pb 2 B 5 o 9 Mix Br:NaF:PbO=1:1:4, put it into a Φ60mm×40mm open platinum crucible, raise the temperature to 750°C, keep the temperature for 80 hours and then cool down to 620°C, and cut the Pb along the b-axis 2 B 5 o 9 The Br seed crystal is fixed on the lower end of the seed rod with a platinum wire, and the seed crystal is introduced into the crucible from the small hole on the top of the furnace to make it contact with the liquid surface. The seed crystal rotates at a rate of 50 rpm, and the direction of rotation is reversible. Time 3 Minutes, the time interval is 0.4 minutes, keep the temperature for 1 hou...

Embodiment 3

[0044] Take reaction formula (3) as an example: but not limited to (3).

[0045] According to the equation Pb(NO 3 ) 2 +H 3 BO 3 +HBr→Pb 2 B 5 o 9 Br+H 2 O↑+NO 2 ↑ Synthesis of Pb 2 B 5 o 9 Br compound, specific operation steps are carried out according to embodiment 1;

[0046] The synthesized Pb 2 B 5 o 9 Br compound and flux NaF and PbO molar ratio Pb 2 B 5 o 9 Mix Br:NaF:PbO=1:4:2, put it into an open platinum crucible of Φ50mm×40mm, raise the temperature to 750°C, keep the temperature for 50 hours and then cool down to 580°C, the Pb cut along the a-axis 2 B 5 o 9 The Br seed crystal is fixed on the lower end of the seed rod with a platinum wire, and the seed crystal is introduced into the crucible from the small hole on the top of the furnace to make it contact with the liquid surface. The seed crystal rotates at a rate of 30 rpm, and the rotation direction is unidirectional. 6 minutes, the time interval is 0.8 minutes, keep the temperature for 1 hour,...

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Abstract

The invention relates to a large size lead borate bromine nonlinear optical crystal with high frequency-doubled effect and a preparation method and applications thereof. The molecular formula of the crystal is: Pb2B5O9Br, the crystal belongs to a rhombic system, and the molecular weight is 691.50; mixed solution is obtained by evenly mixing a lead borate bromine compound with a fluxing agent, heating, constant temperature, and cooling to the temperature above a saturation point; seed crystal is put into the mixed solution, the temperature is rapidly reduced to the saturation point, and the seed crystal is led to grow crystal in the solution; after growing to the required size, the crystal is lifted from the liquid surface, the temperature is reduced to room temperature, and the large size lead borate bromine nonlinear optical crystal is obtained. The preparation of the crystal is characterized by simple operation, short growth cycle and low cost. The prepared crystal has larger size, good chemical stability and thermal stability, no deliquescence at room temperature, good mechanical performance, easy processing and storage, and the like. The lead borate bromine nonlinear optical crystal can be widely used in nonlinear optical devices such as frequency-doubled conversion, optical parametric oscillator, and the like.

Description

technical field [0001] The invention relates to growing a large-size nonlinear optical crystal lead bromide borate with high frequency doubling effect from an optimized composite flux, and the lead bromine borate crystal growth process and its use as a nonlinear optical device. Background technique [0002] In the past ten years, due to the continuous deepening of social changes based on communication and information, nonlinear optical crystal materials (including laser frequency conversion materials, electro-optical materials and photorefractive materials) have been rapidly developed as one of the important information materials. development, and played an increasingly important role in the high-tech field. For example, by using the frequency doubling effect of the crystal, the frequency of the laser can be changed, and the wavelength range of the laser light source can be broadened, thereby obtaining a new laser light source and making the laser widely used. [0003] At p...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/10C30B11/00G02F1/355
Inventor 潘世烈王永疆李锋范晓云罗兴程
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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