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Mg, Hf and Fe three-doping lithium niobate crystal and method for preparing the same

A lithium niobate, three-doping technology, applied in chemical instruments and methods, crystal growth, single crystal growth, etc., can solve the problems of low resistance to light damage and slow response time, so as to improve the resistance to light damage and shorten the The effect of response time

Inactive Publication Date: 2008-12-24
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problems of slow response time and low light damage resistance in Fe-doped lithium acid crystals prepared in the prior art, and provide a Mg, Hf and Fe triple-doped lithium niobate crystal and its preparation method

Method used

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  • Mg, Hf and Fe three-doping lithium niobate crystal and method for preparing the same
  • Mg, Hf and Fe three-doping lithium niobate crystal and method for preparing the same
  • Mg, Hf and Fe three-doping lithium niobate crystal and method for preparing the same

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specific Embodiment approach 1

[0009] Specific embodiment one: In this embodiment, Mg, Hf and Fe three-doped lithium niobate crystal is made of Li 2 CO 3 , Nb 2 o 5 , Fe 2 o 3 , MgO and HfO 2 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 MgO is 0.01-0.05% (mass), the doping concentration of MgO is 1-6mol%, and the doping concentration of HfO 2 The doping concentration is 1-5 mol%.

specific Embodiment approach 2

[0010] Specific embodiment two: the difference between this embodiment and specific embodiment one is that Mg, Hf and Fe triple-doped lithium niobate crystals are made of Li 2 CO 3 , Nb 2 o 5 , Fe 2 o 3 , MgO and HfO 2 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 MgO is 0.03% (mass), the doping concentration of MgO is 4mol%, HfO 2 The doping concentration is 3mol%. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0011] 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 , MgO and HfO 2 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 a Mg, Hf and Fe tri-doped lithium niobate crystal and the method for preparing the same. The method solves the problems that the response time is slow and the photo damage resistance ability is low in the Fe doped lithium niobate crystal prepared by the prior art. The Mg, Hf and Fe tri-doped lithium niobate crystal is prepared by Li2CO3, Nb2O5, Fe2O3, MgO and HfO2. The method comprises the following steps: (1) weighing up the required components; (2) sintering the components; (3) growing the crystal by czochralski method; (4) obtaining the Mg, Hf and Fe tri-doped lithium niobate crystal by polarization treatment. The method obviously improves the photo damage resistance ability of the lithium niobate crystal and reduces the response time based on maintaining the original excellent performance of the lithium niobate crystal because of doping elements Mg, Hf and Fe in the lithium niobate crystal.

Description

technical field [0001] The invention relates to a lithium niobate crystal and a preparation method thereof. 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, Fe doping is used to improve the diffraction efficiency of li...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G33/00C30B29/30
Inventor 王锐王佳刘维海赵培白徐玉恒
Owner HARBIN INST OF TECH
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