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Barium cesium borate nonlinear optical crystal, and preparation method and application thereof

A technology of nonlinear optics and cesium barium borate, which is applied in nonlinear optics, chemical instruments and methods, optics, etc., can solve the problems of serious layered growth habit, long growth cycle, and easy deliquescence of crystals, etc. Large size crystals, fast growth rate, and good mechanical properties

Active Publication Date: 2019-11-19
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.

Method used

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  • Barium cesium borate nonlinear optical crystal, and preparation method and application thereof
  • Barium cesium borate nonlinear optical crystal, and preparation method and application thereof
  • Barium cesium borate nonlinear optical crystal, and preparation method and application thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] In chemical formula: Ba(NO 3 ) 2 +H 3 BO 3 +Cs 2 CO 3 →CsBa 3 B 11 o 20 +NO 2 ↑+CO 2 ↑+O 2 ↑CsBa was synthesized by solid-state synthesis method 3 B 11 o 20 Compound:

[0036] Ba(NO 3 ) 2 、Cs 2 CO 3 、H 3 BO 3 Put it into a mortar with a molar ratio of 6:1:22, mix and grind it carefully, then put it into a corundum crucible with an opening of Φ100mm×100mm, press it tightly, put it into a muffle furnace, slowly raise the temperature to 450°C, and keep the temperature constant 5 hours, try to drive out the gas, take out the crucible after cooling, take out the sample and grind it evenly, then put it in the crucible, keep the temperature in the muffle furnace at 750°C for 48 hours, take it out, put it in the mortar and pound it Cesium barium borate CsBa can be obtained by crushing and grinding 3 B 11 o 20 compound, and then carry out X-ray analysis to the compound, and the obtained X-ray spectrum is the same as that of the finished product CsBa 3 B ...

Embodiment 2

[0043] With the reaction formula Ba(OH) 2 +H 3 BO 3 +CsOH→CsBa 3 B 11 o 20 +H 2 O ↑ Synthesis of CsBa 3 B 11 o 20 Compound, wherein the molar ratio of each compound is proportioned according to the molecular formula, and the specific operation steps are carried out according to Example 1;

[0044] Synthesized CsBa 3 B 11 o 20 Compound and Flux Cs 2 O mole than CsBa 3 B 11 o 20 :Cs 2 O=1:0.5 put into a Φ100mm×100mm open platinum crucible, put the crucible into a crystal growth furnace, raise the temperature to 750°C, keep the temperature for 20 hours, then cool down to 672°C to obtain a mixed melt of cesium barium borate and flux body;

[0045] Slowly lower the temperature at a rate of 1°C / h, and use the platinum wire suspension method to obtain small crystals as seed crystals during the cooling;

[0046] CsBa cut along the c-axis 3 B 11 o 20 The seed crystal is fixed on the lower end of the seed rod with a platinum wire, and the seed crystal is introduced ...

Embodiment 3

[0050] With the reaction formula BaC 2 o 4 +H 3 BO 3 +Cs 2 C 2 o 4 ·nH 2 O+O 2 →CsBa 3 B 11 o 20 +CO 2 ↑+H 2 O ↑ Synthesis of CsBa 3 B 11 o 20 Compound, wherein the molar ratio of each compound is proportioned according to the molecular formula, and the specific operation steps are carried out according to Example 1;

[0051] Synthesized CsBa 3 B 11 o 20 Molar ratio of compound and flux CsOH to CsBa 3 B 11 o 20 :CsOH=1:1.5 Put it into a Φ80mm×80mm open platinum crucible, put the crucible into a crystal growth furnace, raise the temperature to 740°C, keep the temperature for 10 hours, then cool down to 650°C to obtain a mixture of cesium barium borate and flux melt;

[0052] Slowly drop to room temperature at a rate of 2.5°C / h to crystallize to obtain seed crystals;

[0053] CsBa cut along any axis 3 B 11 o 20 The 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 s...

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Abstract

The invention relates to a cesium barium borate nonlinear optical crystal, and a preparation method and application thereof. The crystal has a chemical formula of CsBa<3>B<11>O<20> and a molecular weight of 983.84, and belongs to an orthogonal system; the space group of the crystal is Cmc2<1>; and the cell parameters of the crystal are as follows: a is equal to 19.011(7) angstroms, b is equal to 10.837(4) angstroms, c is equal to 8.578(3) angstroms, Z is equal to 4, V is equal to 1767.4(11) angstroms, and Moh's hardness is 4-5. The crystal is prepared by using a flux method. The cesium bariumborate nonlinear optical crystal obtained by using the method is applied to preparation of nonlinear optical devices. The crystal has a large size which is at least at a centimeter level, and has theadvantages of high preparation speed, simple operation, low cost, large size, wide light transmission band, good mechanical properties, difficult fragmentation, stable physicochemical properties, easyprocessing and the like.

Description

technical field [0001] The invention relates to a cesium barium borate nonlinear optical crystal, a preparation method and application thereof. Background technique [0002] At present, the main nonlinear optical materials used in the frequency conversion of ultraviolet and deep ultraviolet bands are: BBO (β-BBO), LBO (LiB 3 o 5 ) crystals, CBO (CsB 3 o 5 ) crystals, CLBO (CsLiB 6 o 10 ) crystals, SBBO(Sr 2 B 2 be 2 o 7 ) and KABO (K 2 Al 2 B 2 o 7 ) and KBBF (KBe 2 BO 3 f 2 ) crystals. Although the crystal growth technology of these materials has become increasingly mature, there are still obvious deficiencies: such as crystal deliquescence, long growth cycle, serious layered growth habit and high price. Therefore, finding new nonlinear optical crystal materials is still a very important and arduous work. [0003] All solid-state lasers must rely on nonlinear optical crystals to generate harmonics in order to output ultraviolet and deep ultraviolet wavelen...

Claims

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Application Information

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IPC IPC(8): C30B9/12C30B29/22G02F1/355G02F1/37G02F1/39
CPCC30B9/12C30B29/22G02F1/3551G02F1/37G02F1/39
Inventor 潘世烈苗朝虹杨云
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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