Lithium metaborate octo-hydrate nonlinear optical crystal, preparation method thereof and application thereof

A lithium metaborate octahydrate, nonlinear optics technology, applied in the field of inorganic nonlinear optical crystals, can solve the problems of high price, long growth period, and purchase of crystals, etc., and achieve easy large-size crystals, short growth period, and growth speed quick effect

Inactive Publication Date: 2009-12-16
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

Although the crystal growth technology of these materials has become increasingly mature, there are still obvious shortcomings: such as crystal deliquescence, long growth cycle, serious layered growth habit and expensive price, etc.
[0005] In 1897, Le Chatelier et al first reported octahydrate lithium metaborate (LiBO 2 ·8H 2 The structure of O) has also been reported later, but these reports have not yet involved the testing and research of crystal linearity and nonlinear properties and its application in nonlinear optics.
To test the basic physical properties (including nonlinear optical properties) of a crystal, the crystal needs to be a single crystal with a size of several millimeters or even centimeters. So far, there has been no relevant preparation of LiBO with a size sufficient for physical property testing. 2 ·8H 2 O single crystal reports, not to mention that the crystal cannot be purchased in the market, and there is no information about LiBO 2 ·8H 2 The report of the test results of the nonlinear optical properties of O single crystal or the LiBO 2 ·8H 2 O single crystal used in the report of fabricating nonlinear optical devices

Method used

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  • Lithium metaborate octo-hydrate nonlinear optical crystal, preparation method thereof and application thereof
  • Lithium metaborate octo-hydrate nonlinear optical crystal, preparation method thereof and application thereof
  • Lithium metaborate octo-hydrate nonlinear optical crystal, preparation method thereof and application thereof

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Experimental program
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Effect test

Embodiment 1

[0039] According to the chemical reaction formula LiOH+H 3 BO 3 +H 2 O→LiBO 2 ·8H 2 O+H 2 O for example,

[0040] The specific operation steps are as follows:

[0041] Weigh LiOH solid and H 3 BO 3 powder and dissolved it in a container filled with 50 mL of deionized water in which LiOH and H 3 BO 3 The molar ratio of the solution is 1:1, and the incompletely dissolved substance is treated in an ultrasonic wave at a temperature of 25°C for 60 minutes to make it fully mixed and dissolved;

[0042] Then take out the solution, cool it down to room temperature naturally, seal it with a plastic wrap, then pierce some small holes on the film, put the solution in a clean, pollution-free, air-free environment, the reaction temperature is 25°C, and let it stand for 3 days ;

[0043] After 3 days, several smaller crystals formed at the bottom of the container. After the crystals continued to grow until there was no significant change in the size of the crystals, and the growt...

Embodiment 2

[0046] According to the chemical reaction formula LiOH+B 2 o 3 +H 2 O→LiBO 2 ·8H 2 O+H 2 O as an example, the specific operation steps are as follows:

[0047] Weigh LiOH solid and B 2 o 3 powder and dissolved it in a container of 500 mL of deionized water with LiOH and B 2 o 3 The molar ratio of the solution is 2:1, and the incompletely dissolved substance is treated in an ultrasonic wave at a temperature of 40°C for 60 minutes to make it fully mixed and dissolved;

[0048] Then the solution was taken out, naturally cooled to room temperature, and the solution was directly exposed to a clean, pollution-free, air-free environment, and allowed to stand at a reaction temperature of 45°C for 10 days;

[0049] After 10 days, several smaller crystals formed at the bottom of the container. After the crystals continued to grow until the crystal size did not change significantly, and the growth was completed, the solution containing the crystals was filtered to obtain transpa...

Embodiment 3

[0052] With the chemical reaction formula Li 2 O+H 3 BO 3 +H 2 O→LiBO 2 ·8H 2 O+H 2 O as an example, the specific operation steps are as follows:

[0053] Weigh Li 2 O solid and H 3 BO 3 powder and dissolve it in a container of 800mL deionized water, mix and dissolve, in which Li 2 O and H 3 BO 3 The molar ratio is 1:2, and the incompletely dissolved substance is treated in an ultrasonic wave at a temperature of 50°C for 60 minutes to make it fully mixed and dissolved;

[0054] Then the solution was taken out, naturally cooled to room temperature, and the solution was directly exposed to a clean, pollution-free, air-free environment, and allowed to stand for 7 days at a reaction temperature of 50°C;

[0055] After 7 days, several smaller crystals formed at the bottom of the container. After the crystals continued to grow until the crystal size did not change significantly, and the growth was completed, the solution containing the crystals was filtered to obtain tra...

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Abstract

The invention relates to a lithium metaborate octo-hydrate nonlinear optical crystal, a preparation method thereof and application thereof. The molecular formula of the crystal is LiBO2.8H2O and belongs to a trigonal system, the space group is P3, and the molecular weight is 193.87. By adopting a water solution method and slowly volatilizing moisture within 3 to 30 days, the crystal is obtained; and the crystal with good quality is selected as a seed crystal, and then forms the centimeter-sized lithium metaborate octo-hydrate nonlinear optical crystal with large size through a program cooling or constant temperature method. The nonlinear optical effect of the crystal is 0.6 time of that of a KDP crystal, and the ultraviolet absorption edge is less than 90 nanometers. The growth process of the crystal has simple operation and low cost; and the used reagent is an inorganic raw material with the advantages of low toxicity, short growth period, stable physicochemical properties, and the like. The nonlinear optical crystal can be widely applied in nonlinear optical devices such as frequency doubling converters, optical parameter oscillator, and the like.

Description

technical field [0001] The invention relates to an inorganic nonlinear optical crystal, which belongs to the field of inorganic chemistry, and also belongs to the field of material science and optics. Background technique [0002] Nonlinear optical crystals have important application value in many fields, such as laser technology, atmospheric monitoring, national defense and so on. After decades of exploration and research, nonlinear optical crystal materials have achieved fruitful results, especially the research on laser frequency conversion crystals is more in-depth. Many nonlinear optical crystals with excellent performance have been used in optics, communication, medical treatment, military affairs, etc. Get widely used. Because nonlinear optical crystal materials have such important application prospects, the research on nonlinear optical crystal materials has been very active at home and abroad. Nevertheless, there are still many deficiencies in the comprehensive pe...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/22C30B7/00C30B7/08G02F1/355
Inventor 潘世烈韩健王智蓉
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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