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Method for crucible-free rapid growth of centimeter magnitude Ti:Ta2O5 crystals

A crucible-free, ta2o5 technology, applied in the direction of single crystal growth, crystal growth, single crystal growth, etc., can solve the problems of growth of high-melting point crystals, demanding experimental conditions, complicated equipment and other problems, to achieve no macroscopic defects, repeatable The effect of strong performance and simple equipment

Active Publication Date: 2013-02-06
BEIJING UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Using the crucible method to grow crystals, due to its limited conditions, long growth cycle, high cost, and harsh experimental conditions, complex equipment, and complicated operations, it is limited in growing high melting point crystals.

Method used

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  • Method for crucible-free rapid growth of centimeter magnitude Ti:Ta2O5 crystals
  • Method for crucible-free rapid growth of centimeter magnitude Ti:Ta2O5 crystals
  • Method for crucible-free rapid growth of centimeter magnitude Ti:Ta2O5 crystals

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] (1) Preparation of ingredients and rods: the high-purity raw material TiO 2 and Ta 2 o 5 The powder is mixed according to the stoichiometric ratio of 3at%, and then mechanically mixed; put into a high-temperature pre-calcination furnace with a pre-calcination temperature of 1350°C and a pre-calcination time of 14 hours to obtain polycrystalline powder. Put the pre-fired polycrystalline powder into a rubber tube, and then put it into a rod-shaped polycrystalline rod under isostatic pressure;

[0037] (2) Material rod and seed crystal installation: fix the pressed polycrystalline rod on the upper part of the central axis of the single crystal furnace as a material rod, and put the polycrystalline rod into the lower part of the central axis as a seed crystal. The crystal and the material rod form a straight line in the vertical direction, adjust the position of the material rod and the seed crystal to make them contact, and the contact point is on the same horizontal lin...

Embodiment 2

[0041] (1) Preparation of ingredients and rods: the high-purity raw material TiO 2 and Ta 2 o 5 The powder is mixed according to the stoichiometric ratio of 5 at%, and then mechanically mixed; put into a high-temperature pre-calcination furnace, the pre-calcination temperature is 1350 ° C, and the pre-calcination time is 16 hours to obtain polycrystalline powder. Put the pre-fired polycrystalline powder into a rubber tube, and then put it into a rod-shaped polycrystalline rod under isostatic pressure;

[0042] (2) Material rod and seed crystal installation: fix the pressed polycrystalline rod on the upper part of the central axis of the single crystal furnace as a material rod, and put the polycrystalline rod into the lower part of the central axis as a seed crystal. The crystal and the material rod form a straight line in the vertical direction, adjust the position of the material rod and the seed crystal to make them contact, and the contact point is on the same horizontal...

Embodiment 3

[0047] (1) Preparation of ingredients and rods: the high-purity raw material TiO 2 and Ta 2 o 5 The powder is mixed according to the stoichiometric ratio of 8at%, and then mechanically mixed; put into a high-temperature pre-calcination furnace, the pre-calcination temperature is 1350 ° C, and the pre-calcination time is 18 hours to obtain polycrystalline powder. Put the pre-fired polycrystalline powder into a rubber tube, and then put it into a rod-shaped polycrystalline rod under isostatic pressure;

[0048] (2) Material rod and seed crystal installation: fix the pressed polycrystalline rod on the upper part of the central axis of the single crystal furnace as a material rod, and put the polycrystalline rod into the lower part of the central axis as a seed crystal. The crystal and the material rod form a straight line in the vertical direction, adjust the position of the material rod and the seed crystal to make them contact, and the contact point is on the same horizontal ...

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Abstract

A method for crucible-free rapid growth of centimeter magnitude Ti:Ta2O5 crystals belongs to the field of Ti:Ta2O5 crystal growth. Mixing, ball-milling and burning are carried out on TiO2 and Ta2O5 powder to press rob-shaped polycrystalline rods; the polycrystalline rods respectively serve as charge rods and seed crystals to be installed in a single crystal furnace, a heating rate is set, crystal growth is carried out, cooling time is set, the crystals after growing are cooled to a room temperature. The method is a crucible-free growth technique which can rapidly grow centimeter magnitudes, is free of macroscopic defect and has high-quality Ti:Ta2O5 crystals.

Description

technical field [0001] The present invention belongs to Ti:Ta 2 o 5 In the field of crystal growth, it involves a crucible-free rapid growth of centimeter-scale Ti:Ta 2 o 5 Crystal method. technical background [0002] Crystal materials play a very important role in the development of science and technology. They are the important cornerstone of the information age and the material basis for the development of high technology. The main crystal preparation techniques mainly include: melt growth, solution growth, vapor phase growth, and solid phase growth. As a new type of crucible-free crystal growth method, the crucible-free growth method has the advantages of no need for a crucible, less pollution, and fast growth. Great advantage. In the floating zone method, there is a melting zone between the growing crystal and the polycrystalline rod, which is supported by surface tension. The melting zone moves from top to bottom, or bottom to top, to complete the crystallizati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C30B29/16C30B13/00
Inventor 蒋毅坚徐宏马云峰王越
Owner BEIJING UNIV OF TECH
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