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Compound lithium cesium phosphate non-linear optical crystal, preparation method and uses thereof

A technology of nonlinear optics and lithium cesium phosphate, which is applied in the field of compound lithium cesium phosphate nonlinear optical crystals and its preparation and application, and can solve the problems of crystal deliquescence, high price, and long growth cycle

Active Publication Date: 2016-12-07
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

For example: crystals are prone to deliquescence, long growth cycle or expensive, etc.
There is also KBBF, which is excellent in all aspects, but also has fatal flaws in application such as layered growth habits.

Method used

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  • Compound lithium cesium phosphate non-linear optical crystal, preparation method and uses thereof
  • Compound lithium cesium phosphate non-linear optical crystal, preparation method and uses thereof
  • Compound lithium cesium phosphate non-linear optical crystal, preparation method and uses thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] According to the reaction formula Li 2 CO 3 +2NH 4 h 2 PO 4 +2Cs 2 CO 3 →2LiCs 2 PO 4 +3CO 2 ↑+2H 2 O↑+2NH 4 ↑+0.5O 2 ↑Synthetic compound LiCs 2 PO 4 ; Using solid-phase synthesis method:

[0032] a. Will Li 2 CO 3 , NH 4 h 2 PO 4 、Cs 2 CO 3 Weigh it into a mortar with a molar ratio of 1:2:2, mix and grind it carefully, then put it into an open corundum crucible of Φ100mm×100mm, put it into a muffle furnace, slowly raise the temperature to 400°C, and keep the temperature for 12 hours , take out the crucible after cooling, at this time the sample is relatively loose, then take out the sample and grind it evenly, then put it in the crucible, keep the temperature in the muffle furnace at 540°C for 48 hours, take it out, and get LiCs 2 PO 4 Powder, ground in a mortar for X-ray analysis, the obtained X-ray spectrum and LiCs 2 PO 4 The X-ray spectra obtained by the single crystal structure are consistent;

[0033] Preparation of LiCs by Pulling Method...

Embodiment 2

[0041] According to the reaction formula LiNO 3 +NH 4 h 2 PO 4 +Cs 2 CO 3 →LiCs 2 PO 4 +CO 2 ↑+NO 2 ↑+H 2 O↑+NH 4 ↑+0.5O 2 ↑Synthetic compound LiCs 2 PO 4 , and the specific operation steps are carried out according to embodiment 1 step a:

[0042] Preparation of LiCs by Pulling Method 2 PO 4 Crystal:

[0043] b. The synthesized LiCs 2 PO 4 Put the compound into an open platinum crucible of Φ100mm×100mm, heat it to a temperature of 750°C at a heating rate of 20°C / h, keep the temperature for 10h, and then cool it down to 680°C to obtain a lithium cesium phosphate melt;

[0044] c. Preparation of lithium cesium phosphate seed crystals: Slowly lower the lithium cesium phosphate melt obtained in step b to room temperature at a rate of 1.5°C / h, use the hanging platinum wire method to obtain small crystals during the cooling process, and spontaneously crystallize to obtain seed crystals ;

[0045] d. Growing crystals on the surface of the compound melt: place the...

Embodiment 3

[0050] According to the reaction formula LiOH+NH 4 h 2 PO 4 +Cs 2 O→LiCs 2 PO 4 +1.5H 2 O↑+NH 4 ↑+0.25O 2 ↑Synthetic compound LiCs 2 PO 4 , the specific operation steps are carried out according to embodiment 1 step a:

[0051] Preparation of LiCs by Kyropoulos method 2 PO 4 Crystal:

[0052] b. The synthesized LiCs 2 PO 4 Put the compound into an open platinum crucible of Φ100mm×100mm, heat it to a temperature of 730°C at a heating rate of 20°C / h, keep the temperature for 4h to obtain a melt, and then cool it down to 670°C to obtain a lithium cesium phosphate melt ;

[0053] c. Preparation of lithium cesium phosphate seed crystals: Slowly lower the lithium cesium phosphate melt obtained in step b to room temperature at a rate of 0.5°C / h, use the hanging platinum wire method to obtain small crystals during the cooling process, and spontaneously crystallize to obtain seed crystals ;

[0054] d. Growing crystals on the surface of the compound melt: place the cru...

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Abstract

The invention relates to a compound lithium cesium phosphate non-linear optical crystal, a preparation method and uses thereof. According to the present invention, the crystal has a chemical formula of LiCs2PO4, the space group is Cmc 2[1], the crystal belongs to the orthorhombic system, the crystal cell parameters are that a is 5.813(5), b is 12.016(10), c is 8.035 (7), Z is 4 and V is 561.2(8)angstrom<3>, and the molecular weight is 367.7; the compound lithium cesium phosphate is synthesized by using a solid phase reaction method; the lithium cesium phosphate non-linear optical crystal grows by using a Czochralski method, a Kyropoulos method or a Bridgman-Stockbarge method, and the lithium cesium phosphate non-linear optical crystal obtained through the method of the invention has characteristics of high mechanical hardness, easy cutting, easy polishing processing, and easy storage; and the obtained compound lithium cesium phosphate non-linear optical crystal is widely applied in preparation of optical communication elements, frequency multiplication generators, up-frequency converters, down-frequency converters or optical parametric oscillators, and other non-linear optical devices.

Description

technical field [0001] The invention relates to a compound lithium cesium phosphate nonlinear optical crystal and its preparation method and application. The chemical formula of the compound is LiCs 2 PO 4 . Background technique [0002] Nonlinear optical crystals have been a research hotspot since the discovery of laser. After decades of exploration and research, the technology in the visible light region has basically matured, but in the ultraviolet region, especially in the vacuum ultraviolet region with a wavelength of less than 200nm, it is still a research field. There is no problem to be cracked. Several well-known crystals that have been commercialized such as: KDP (KH 2 PO 4 ), BBO (β-BBO), LBO (LiB 3 o 5 ) crystals, CBO (CsB 3 o 5 ) crystals, CLBO (CsLiB 6 o 10 ) crystals have more or less their own limitations. For example: the crystal is easy to deliquescence, the growth cycle is long or the price is expensive, etc. There is also KBBF, which is excell...

Claims

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Application Information

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IPC IPC(8): C30B29/22C30B15/00C30B28/02
Inventor 潘世烈李琳韩树娟
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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