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Compound lithium rubidium germinate, lithium rubidium germinate nonlinear optical crystal, preparation method and applications

A technology of nonlinear optics and lithium germanate, applied in chemical instruments and methods, crystal growth, single crystal growth, etc., can solve the problems of crystal deliquescence, high price, long growth cycle, etc.

Active Publication Date: 2019-07-23
TIANJIN UNIVERSITY OF TECHNOLOGY
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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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  • Compound lithium rubidium germinate, lithium rubidium germinate nonlinear optical crystal, preparation method and applications
  • Compound lithium rubidium germinate, lithium rubidium germinate nonlinear optical crystal, preparation method and applications
  • Compound lithium rubidium germinate, lithium rubidium germinate nonlinear optical crystal, preparation method and applications

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0047] According to the reaction formula: Li 2 CO 3 +Rb 2 CO 3 +4GeO 2 →2LiRbGe 2 o 5 +2CO 2 ↑ Synthetic compound LiRbGe 2 o 5 :

[0048] Will Li 2 CO 3 , Rb 2 CO 3 、GeO 2 Weigh it into a mortar with a molar ratio of 1:1:4, mix and grind it carefully, then put it into a corundum crucible with an opening of Φ100mm×100mm, put it into a muffle furnace, slowly raise the temperature to 300°C, and keep the temperature constant for 24 hours. Cool to room temperature, take it out and put it into the muffle furnace after the second grinding, then raise the temperature to 750°C, keep the temperature for 24 hours, cool to room temperature, take it out and put it into the muffle furnace after the third grinding, and then heat it at 750°C Constant temperature for 48 hours, take out the compound lithium rubidium germanate single-phase polycrystalline powder obtained by grinding, and carry out X-ray analysis on the product, the obtained X-ray spectrum is consistent with that of...

Embodiment 2

[0055] According to the reaction formula: 4LiNO 3 +2Rb 2 CO 3 +8 GeO 2 →4LiRbGe 2 o 5 +4NO 2 ↑+2CO 2 ↑+O 2 ↑ Synthetic compound LiRbGe 2 o 5 :

[0056] LiNO 3 , Rb 2 CO 3 、GeO 2 Weigh the raw materials directly according to the molar ratio of 2:1:4, and combine the weighed raw materials with the flux Rb 2 O-GeO 2 Mixed at a molar ratio of 1:4, where Rb 2 O and GeO 2 The molar ratio is 3:5, put it into an open platinum crucible of Φ80mm×80mm, heat up to a temperature of 800°C, and keep the temperature at a constant temperature for 60 hours to obtain a mixed melt, which is cooled to a temperature of 650°C;

[0057] Slowly cool down to room temperature at a rate of 1.5°C / h, and spontaneously crystallize to obtain lithium rubidium germanate seed crystals;

[0058] LiRbGe will be obtained 2 o 5 The seed crystal is fixed on the seed crystal rod, and the seed crystal is lowered from the top of the crystal growth furnace. The seed crystal is preheated on the surfac...

Embodiment 3

[0062] According to the reaction formula: 2LiOH+Rb 2 CO 3 +4GeO 2 →2LiRbGe 2 o 5 +CO 2 ↑+H 2 O ↑ Synthetic compound LiRbGe 2 o 5 :

[0063] LiOH, Rb 2 CO 3 、GeO 2 Weigh the raw materials directly according to the molar ratio of 2:1:4, and combine the weighed raw materials with the flux LiF-TeO 2 According to the molar ratio of 1:3, mix LiF and TeO 2 The molar ratio is 3:1, put it into an open platinum crucible of Φ80mm×80mm, heat up to a temperature of 780°C, keep the temperature at a constant temperature for 60 hours to obtain a mixed melt, and then lower it to a temperature of 620°C;

[0064] Slowly cool down to room temperature at a rate of 3.5°C / h, and spontaneously crystallize to obtain lithium rubidium germanate seed crystals;

[0065] LiRbGe will be obtained 2 o 5The seed crystal is fixed on the seed crystal rod, and the seed crystal is lowered from the top of the crystal growth furnace. The seed crystal is preheated on the surface of the mixed melt for 1...

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Abstract

Discloses are a compound lithium rubidium germinate, a lithium rubidium germinate nonlinear optical crystal, a preparation method and applications. A chemical formula of the compound lithium rubidiumgerminate and the lithium rubidium germinate nonlinear optical crystal is LiRbGe2O5. The crystal belongs to an orthorhombic system, a space group is Pca21, a cell parameter is molecular weight 317.59,and power frequency doubling effect is about one time KDP(KH2PO4). The compound lithium rubidium germinate is synthesized by a solid phase reaction method. The lithium rubidium germinate nonlinear optical crystal is grown by a high temperature melt method or a czochralski method. The lithium rubidium germinate nonlinear optical crystal has high mechanical hardness, is prone to cutting, polishingprocessing and preservation, and is widely used in preparing frequency doubling generators, upper frequency converters, lower frequency converters, or optical parametric oscillators and other nonlinear optical devices.

Description

technical field [0001] The present invention relates to the chemical formula LiRbGe 2 o 5 The compound lithium rubidium germanate and the lithium rubidium germanate nonlinear optical crystal, the preparation method of the crystal and the nonlinear optical device made by using the crystal. Background technique [0002] Exploring new nonlinear optical crystals with large frequency doubling effect, wide transmission band, large optical damage threshold, and stable physical and chemical properties has always been a hot topic in the field of laser frequency conversion. At present, the main nonlinear optical materials are: β-BaB 2 o 4 (BBO) crystal, LiB 3 o 5 (LBO) crystal, CsB 3 o 5 (CBO) crystal, CsLiB 6 o 10 (CLBO) crystals and KBe 2 BO 3 f 2 (KBBF) 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 an...

Claims

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Application Information

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IPC IPC(8): C30B29/32C30B15/00
CPCC30B15/00C30B29/32
Inventor 俞洪伟徐晶晶吴红萍胡章贵
Owner TIANJIN UNIVERSITY OF TECHNOLOGY
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