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Compound lead borate and nonlinear optical crystal of lead borate, preparation method thereof and purpose thereof

A nonlinear optics, compound technology, applied in nonlinear optics, chemical instruments and methods, optics, etc., can solve problems such as high price, long growth cycle, and easy deliquescence of crystals

Active Publication Date: 2013-04-17
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 growth technology of these crystals has become increasingly mature, there are still obvious shortcomings: such as crystals are prone to deliquescence, long growth cycle, serious layered growth habit and expensive price, etc.

Method used

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  • Compound lead borate and nonlinear optical crystal of lead borate, preparation method thereof and purpose thereof
  • Compound lead borate and nonlinear optical crystal of lead borate, preparation method thereof and purpose thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0035] Embodiment 1: (adopting melt method)

[0036] Synthetic lead borate (Pb 4 O(BO 3 ) 2 ) compound:

[0037] The lead borate compound is synthesized by a solid-state reaction method, and its chemical equation is: 4Pb(NO 3 ) 2 +2H 3 BO 3 →Pb 4 O(BO 3 ) 2 +8NO 2 ↑+3H 2 O↑+2O 2 ↑;

[0038] Pb(NO 3 ) 2 、H 3 BO 3 Put it into a mortar with a stoichiometric ratio of 2:1, mix and grind it carefully, then put it into a corundum crucible with an opening of Φ400mm×400mm, press it tightly, put it in a muffle furnace, and slowly raise the temperature to 300°C, constant temperature 24 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 430°C for another 48 hours, take it out, put it in the mortar Pound and grind to obtain lead borate compound. Carry out X-ray analysis to this product, gained X-ray spectrogram and...

Embodiment 2

[0046] According to the reaction formula 4PbO+2H 3 BO 3 →Pb 4 O(BO 3 ) 2 +9H 2 O ↑ synthesis of Pb 4 O(BO 3 ) 2 Compound, specific operation steps are carried out according to embodiment 1;

[0047] Preparation of Pb by Pulling Method 4 O(BO 3 ) 2 Crystal:

[0048] a, the synthesized Pb 4 O(BO 3 ) 2 Put the compound into a Φ90mm×90mm open platinum crucible, heat it to a temperature of 370°C, and keep the temperature constant for 5 hours to obtain a mixed melt of lead borate;

[0049] b. Preparation of lead borate seed crystals: Slowly lower the mixed melt or mixed melt obtained in step a to room temperature at a rate of 0.5°C / h, and spontaneously crystallize to obtain lead borate seed crystals;

[0050] C, the crucible that fills the mixed melt that step a makes is placed in the crystal growth furnace, the Pb that the seed crystal that step b obtains is cut along the c-axis 4 O(BO 3 ) 2 The seed crystal is fixed on the lower end of the seed rod with a platinu...

Embodiment 3

[0053] Embodiment 3: (adopt melt method)

[0054] According to the reaction formula 4PbC 2 o 4 +2H 3 BO 3 →Pb 4 O(BO 3 ) 2 +4CO 2 ↑+3H 2 O↑+4CO↑Synthesis of Pb 4 O(BO 3 ) 2 Compound, specific operation steps are carried out according to embodiment 1;

[0055] Preparation of Pb by Kyropoulos method 4 O(BO 3 ) 2 Crystal:

[0056] a, the synthesized Pb 4 O(BO 3 ) 2 The compound is put into an open platinum crucible of Φ80mm×80mm and heated to melt, heated to a temperature of 450°C, and kept at a constant temperature for 25 hours to obtain a mixed melt of lead borate;

[0057] b. Preparation of lead borate seed crystals: Slowly lower the mixed melt obtained in step a to room temperature at a rate of 2 °C / h, and spontaneously crystallize to obtain lead borate seed crystals;

[0058] C, the crucible that fills the mixed melt that step a makes is placed in the crystal growth furnace, the Pb that the seed crystal that step b obtains is cut along the c-axis 4 O(BO ...

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Abstract

The invention relates to a compound lead borate and a nonlinear optical crystal of the lead borate, a preparation method thereof and a purpose thereof. Chemical formulas of the compound lead borate and the nonlinear optical crystal of the lead borate are all Pb4O(BO3)2, wherein the crystal is an orthorhombic system, a space group is Aba2, the cell parameters comprise: a=15.4598(16) Angstrom, b=10.8050(11) Angstrom, c=9.9452(11) Angstrom, V=1661.3(3) Angstrom<3>, a molecular weight is 962.38, a powder frequency multiplication effect of the compound is 3 times that of KDP (KH2PO4), and a translucent band is 280 to 3300 nm. The compound lead borate is prepared by using a solid phase reaction method, and the nonlinear optical crystal of the lead borate is grown by using a melt method or a high-temperature melt method. The nonlinear optical crystal of the lead borate is moderate is mechanical hardness, easy to cut, polish and preserve, and can be widely applied for preparing nonlinear optical devices such as frequency multiplication generators, upper frequency converters, lower frequency converters, optical parametric oscillators, etc.

Description

technical field [0001] The present invention relates to the chemical formula Pb 4 O(BO 3 ) 2 The compound lead borate and the lead borate nonlinear optical crystal, the preparation method of the crystal and the nonlinear optical device manufactured by using the crystal. Background technique [0002] In laser technology, the laser wave bands that can be directly obtained by using laser crystals are limited, and there are still blank wave bands from ultraviolet to infrared spectral regions. Using nonlinear optical crystals, through nonlinear optical effects such as frequency doubling, frequency mixing, and optical parametric oscillation, the limited laser wavelength can be converted into a new band of laser light. Using this technology can fill in the blank spectral region of the laser wavelength emitted by various laser devices, so that the laser can be used more widely. [0003] At present, the main nonlinear optical crystals are: BBO (β-BBO), LBO (LiB 3 o 5 ), CBO (Cs...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B11/00C30B29/22G02F1/355
Inventor 潘世烈俞洪伟吴红萍
Owner XINJIANG TECHN INST OF PHYSICS & CHEM CHINESE ACAD OF SCI
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