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Alumina crystalline material and preparation method and application

A crystal material, aluminum oxide technology, applied in the direction of alumina/aluminum hydroxide, aluminate/alumina/aluminum hydroxide purification, etc., can solve the problem of restricting the purity and density of sapphire crystal, and the low performance index of sapphire crystal purity and density , can not meet the special use requirements and other problems at the same time, to achieve high economic and social benefits, and reduce prices

Inactive Publication Date: 2011-08-17
马庆忠
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the current status of sapphire crystals is difficult to meet the urgent needs of the rapid development of science and technology and industrialization. Not only is there a passive situation where sapphire crystals are too dependent on imports, but also sapphire crystals have low purity and density performance indicators, which cannot meet special uses at the same time. The required technical defects seriously restrict the application of sapphire crystal
In order to overcome the current technical status of sapphire crystals, technicians in this technical field have carried out a lot of improved research on the growth process and equipment of sapphire crystals, and have made gratifying achievements in the localization of sapphire crystals. The technical issues of purity and density have never really been resolved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] A kind of aluminum oxide crystal material (molecular formula is AL 2 o 3 ), it is to meet the main materials used to prepare sapphire crystals, and to meet the requirements for use as oxide substrate materials, nitride semiconductor substrates, and large-scale integrated circuit substrates. The alumina crystal material It is an α-type alumina crystal material, its content of aluminum oxide is ≥99.999%, and its density is 3.98g / cm 3 .

[0017] The preparation method of the alumina crystal material described in Example 1 of the present invention is in a clean environment, that is, according to the requirements of the national standard (GB50073-2001) "Code for Design of Clean Workshops", the air cleanliness in the workshop is required to be 100 grades , using vertical and horizontal single-flow flow patterns, the airflow speed is greater than 0.25 m / s and 0.35 m / s respectively; the indoor air parameter requirements are: the temperature is 18-26 ℃, and the relative humidi...

Embodiment 2

[0023] A kind of aluminum oxide crystal material (molecular formula is AL 2 o 3), it is to meet the main materials used to prepare sapphire crystals, and to meet the requirements for use in the fields of materials for special optical components, high-voltage materials, compound semiconductor materials, etc., and its alumina crystal material is α-type oxide Aluminum crystal material with a content of Al2O3 ≥ 99.999% and a density of 3.98g / cm 3 .

[0024] The preparation method of the aluminum oxide crystal material described in Example 2 of the present invention is in a clean environment, that is, according to the requirements of the national standard (GB50073-2001) "Code for Design of Clean Workshops", the air cleanliness in the workshop is required to be 100 grades , using vertical and horizontal single-flow flow patterns, the airflow speed is greater than 0.25 m / s and 0.35 m / s respectively; the indoor air parameter requirements are: the temperature is 18-26 ℃, and the rela...

Embodiment 3

[0030] A kind of aluminum oxide crystal material (molecular formula is AL 2 o 3 ), it is to meet the main materials used to prepare sapphire crystals, and to meet the requirements for use as infrared military devices, missiles, submarines, satellite space technology, high-intensity laser window materials, etc., its alumina crystal material It is an α-type alumina crystal material, its content of aluminum oxide is ≥99.999%, and its density is 3.98g / cm 3 .

[0031] The preparation method of the alumina crystal material described in Example 3 of the present invention is in a clean environment, that is, according to the national standard

[0032] (GB50073-2001) "Code for Design of Clean Factory Buildings", the air cleanliness in the factory building is required to be 100, and the vertical and horizontal single flow patterns are adopted, and the air velocity is greater than 0.25 m / s and 0.35 m / s respectively; indoor air The parameter requirements are: temperature is 18-26°C, rel...

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Abstract

The invention discloses an alumina material for preparing sapphire crystals and a preparation method and application and belongs to the technical field of a crystalline material. The invention adopts the following technical scheme that the alumina crystalline material is characterized in that the crystalline material is an alpha-type alumina crystalline material and has aluminium oxide content of more than or equal to 99.999 percent and density of 3.98g / cm<3>. The alumina crystalline material is prepared by technological processes of purifying and dehydrating to remove 23 units of crystal water, preparing an gamma-type alumina powder material, preparing alpha-type alumina crystals and washing and drying in clean environment. Compared with the prior art, the alumina crystalline material has high purity, high density and basically same performance indexes with the existing imported alumina crystals; the imported alumina crystals can be completely replaced with the alumina crystalline material; the price of the sapphire crystals is reduced; and the alumina crystalline material can be widely applied to an infrared military technology, an LED (light-emitting diode) and a window material of high-strength laser, and has outstanding substantive characteristics and obvious progresses of laying a solid foundation for localization and industrialization of the sapphire crystal material and the like.

Description

technical field [0001] The invention relates to the technical field of crystal materials, in particular to the technical field of an alumina material for preparing sapphire crystals, a preparation method and an application. Background technique [0002] With the advent of the world's financial and economic crisis, science and technology have developed by leaps and bounds and are showing ever-changing trends. Whether it is the lunar exploration project, national defense construction, or a large number of high-tech products, they are constantly introducing new ones, which also provides a broad development space for the research and application of new materials and new processes. Sapphire crystal is one example. Sapphire crystal is a high temperature and corrosion resistant aluminum oxide (molecular formula is Al 2 o 3 ) single crystal material is an extremely important basic material for modern industry and optoelectronics industry. It has excellent optical properties, mech...

Claims

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Application Information

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IPC IPC(8): C01F7/02C01F7/46
Inventor 张晚兰马庆忠
Owner 马庆忠