Preparing method for Zr:LiNbO3 crystal

A crystal and rotation speed technology, applied in crystal growth, chemical instruments and methods, single crystal growth, etc., can solve the problems of slow growth of lithium niobate crystals, limited ability to resist light damage, poor crystal quality and easy cracking, etc., to achieve Ease of growth, uniform composition, and improved photorefractive properties

Inactive Publication Date: 2009-04-22
YIBIN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0007] The purpose of the present invention is to solve the limited improvement of the anti-light damage ability of lithium niobate crystals by doping magnesium or zinc element under the premise of keeping the excellent performance of lithium niobate crystals itself; the lithium niobate crystals close to the stoichiometric ratio are difficult to grow and The growth rate of lithium niobate crystals doped with hafnium is slow, and the crystal quality is poor and easy to crack. Hafnium is radioactive. Hafnium oxide is expensive, difficult to buy, highly toxic, and is a non-environmentally friendly material. A Zr :LiNbO 3 Crystal preparation method

Method used

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  • Preparing method for Zr:LiNbO3 crystal
  • Preparing method for Zr:LiNbO3 crystal
  • Preparing method for Zr:LiNbO3 crystal

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specific Embodiment approach 1

[0011] Specific implementation mode one: this implementation mode Zr:LiNbO 3 The crystals are made of ZrO with a purity of 99.99% 2 , Nb 2 o 5 and LiCO 3 made; where ZrO 2 The doping amount is ZrO 2 , Nb 2 o 5 and LiCO 3 4% to 6% of the total substance amount, and the molar ratio of Li to Nb is 0.946.

[0012] Zirconium element itself is a four-valent valence-changing element, so zirconium element has little negative impact on the excellent ferroelectric, piezoelectric, photoelectric, nonlinear and photorefractive properties of lithium niobate crystal, which is beneficial to the storage performance of the crystal.

specific Embodiment approach 2

[0013] Specific embodiment two: the difference between this embodiment and specific embodiment one is: ZrO 2 The doping amount is ZrO 2 , Nb 2 o 5 and LiCO 3 4% of the total amount of substance. Others are the same as the first embodiment.

[0014] This embodiment Zr:LiNbO 3 (4mol%Zr:LiNbO 3 ) crystals such as figure 1 As shown, the crystal is LiNbO 3 Crystal natural color, high gloss, uniform composition, no blemishes, no growth streaks and no cracks.

specific Embodiment approach 3

[0015] Specific embodiment three: the difference between this embodiment and specific embodiment one is: ZrO 2 The doping amount is ZrO 2 , Nb 2 o 5 and LiCO 3 5% of the total amount of substance. Others are the same as the first embodiment.

[0016] This embodiment Zr:LiNbO 3 The crystal is 5mol% Zr:LiNbO 3 crystals.

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Abstract

The invention relates to a Zr:LiNbO3 crystal and the preparing method thereof, relating to a crystal and the preparing method. And the Zr:LiNbO3 crystal is made of ZrO2, Nb2O5 and LiCO3 with the same purity of 99.99%, where ZrO2 doping quantity is 4%-6% of total quantity of ZrO2, Nb2O5 and LiCO3, and the molar ratio of Li to Nb is 0.946; and the preparing method: (1) weighing and mixing ZrO2, Nb2O5 and LiCO3; (2) making crystal growth by Czochralski method; (3) polarizing; (4) cutting crystals and making surface optical quality polishing and obtaining Zr:LiNbO3 crystals. And it assures the original excellent performance of LiNbO3 crystal and has optical loss resistance higher than 5mol%Mg:LiNbO3,6.5%Zn:LiNbO3 and 4mol%Hf:LiNbO3 by 85%, 100% and 112%, respectively. And the preparing method has features of simple, convenient to operate and high crystal growing rate.

Description

technical field [0001] The invention relates to a method for preparing crystals. Background technique [0002] Lithium niobate crystal (LiNbO 3 ) has attracted widespread attention due to its excellent ferroelectric, piezoelectric, photoelectric, nonlinear and photorefractive properties. Lithium niobate crystals have been widely used in surface acoustic wave delay line devices, optical parametric devices, optical oscillators, photoelectric modulators, frequency converters, 1.53μm wavelength solid-state lasers, and 500nm green up-conversion solid-state lasers and other devices; and lithium niobate crystals have become potential mass optical information storage devices due to their own photorefractive properties. But lithium niobate crystals (LiNbO 3 ) is less resistant to light damage than other crystals, which seriously limits its application in actual production and life. [0003] Now there are three ways to improve the light damage resistance of lithium niobate crystal...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C30B29/30C30B15/00
Inventor 孙亮徐玉恒赵连城
Owner YIBIN UNIV
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