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Preparation of In, Fe and Cu three-doping lithium niobate crystal

A lithium niobate, three-doping technology, applied in chemical instruments and methods, crystal growth, single crystal growth, etc., to achieve the effect of improving the resistance to light damage and shortening the response time

Inactive Publication Date: 2011-03-23
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The object of the invention is to solve the problems that the acid lithium crystal doped with Fe and Cu prepared by the prior art has slow response time and low light damage resistance, and provides A kind of preparation method of In, Fe and Cu triple-doped lithium niobate crystal

Method used

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specific Embodiment approach 1

[0010] Specific implementation mode 1: In this implementation mode, In, Fe and Cu triple-doped lithium niobate crystals are made of Li 2 CO 3 , Nb 2 o 5 , Fe 2 o 3 , CuO and In 2 o 3 made; where Li 2 CO 3 and Nb 2 o 5 The molar ratio of Fe is 0.85~1.38:1, Fe 2 o 3 The doping concentration of CuO is 0.073-0.077% (mass), the doping concentration of CuO is 0.018-0.022% (mass), In 2 o 3 The doping concentration is 0.5-1.5 mol%.

specific Embodiment approach 2

[0011] Specific embodiment two: the difference between this embodiment and specific embodiment one is that In, Fe and Cu three-doped lithium niobate crystals are made of Li 2 CO 3 , Nb 2 o 5 , Fe 2 o 3 , CuO and In 2 o 3 made; where Li 2 CO 3 and Nb 2 o 5 The molar ratio of Fe is 0.946:1, Fe 2 o 3 The doping concentration of CuO is 0.075% (mass), the doping concentration of CuO is 0.020% (mass), In 2 o 3 The doping concentration is 1.0mol%. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0012] Specific embodiment three: the difference between this embodiment and specific embodiment one or two is that Li 2 CO 3 , Nb 2 o 5 , Fe 2 o 3 , CuO and In 2 o 3 The mass purity is higher than 99.99%. Others are the same as in the first or second embodiment.

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Abstract

The invention relates to an In, Fe and Cu triple-doped lithium niobate crystal and a preparation method thereof, relating to the lithium niobate crystal and the preparation method thereof. The method solves the problems of slow response time and low light injury resistant ability of a doped lithium tantalite crystal prepared by the prior art. The In, Fe and Cu triple-doped lithium niobate crystalis prepared by Li2CO3, Nb2O5, Fe2O3, CuO and In2O3. The method comprises the following steps: firstly, required compositions are weighed; secondly, sintering is performed; thirdly, the crystal is grown by adoption of the crystal pulling method; fourthly, polarization treatment is performed; and fifthly, oxidation treatment or reduction treatment is performed, and the In, Fe and Cu doped lithium niobate crystal is obtained. The method dopes element indium (In), ferrum (Fe) and Copper (Cu) in the lithium niobate crystal, and obviously improves the light injury resistant ability and the responsetime of the lithium niobate crystal on the basis of preserving the prior superior performance of the lithium niobate crystal.

Description

technical field [0001] The invention relates to a preparation method of lithium niobate crystal. Background technique [0002] Lithium niobate (LiNbO 3 ) crystal is a widely used artificial crystal with good piezoelectric, electro-optic, acousto-optic and nonlinear optical properties, and plays an extremely important role in the fields of holographic storage, phase conjugation, and optical waveguide. [0003] Lithium niobate crystal materials are mostly composed of the same composition, and their general performance is lithium deficiency. Due to the severe lithium deficiency in the crystal, a large number of intrinsic structural defects are formed, so that the application of lithium niobate crystal as a photorefractive crystal in holographic storage is limited. There are great limitations, mainly reflected in the low diffraction rate, long response time, and low resistance to light damage. At present, doping Fe and Cu is used to improve the diffraction efficiency of lithi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/30C30B15/04
Inventor 徐衍岭刘维海王佳王锐
Owner HARBIN INST OF TECH
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