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High-density large-size alumina material for sapphire and preparation method of material

An alumina and sapphire technology, which is applied in the field of high-density and large-size alumina materials for sapphire and its preparation, can solve the problems of low recycling rate of sapphire scraps, low alumina content, low product density, etc., and achieves low production cost, The effect of high alumina content and simple preparation process

Inactive Publication Date: 2018-07-27
新疆三锐佰德新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The invention provides a high-density and large-size alumina material for sapphire and a preparation method thereof, which overcomes the above-mentioned deficiencies in the prior art, and can effectively solve the problems of low product density, low production efficiency, and recycling rate of sapphire scraps in the prior art. low and low alumina content

Method used

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1: The sapphire is made of high-density and large-size alumina material. The raw materials include 70 to 95 parts of alumina powder and 50 to 90 parts of alumina polycrystalline ingot crushed crystals in parts by weight. The sapphire is made of high-density large The size alumina material is obtained according to the following steps: the first step is to mix the required amount of alumina powder and water and stir until it becomes a paste, and the paste is mixed with the required amount of crushed alumina polycrystalline ingots to obtain Paste mixture; the second step, pour the paste mixture into the mold, and dry it naturally to form a shaped product; the third step, send the shaped product to sintering at a high temperature of 1000°C to 1800°C to obtain a high-density large Dimensional alumina material.

Embodiment 2

[0021] Embodiment 2: The sapphire is made of high-density and large-size alumina material. The raw materials include 70 or 95 parts of alumina powder and 50 or 90 parts of crushed alumina polycrystalline ingot by weight. The sapphire is made of high-density and large The size alumina material is obtained according to the following steps: the first step is to mix the required amount of alumina powder and water and stir until it becomes a paste, and the paste is mixed with the required amount of crushed alumina polycrystalline ingots to obtain Paste mixture; in the second step, pour the paste mixture into the mold, and dry it naturally to form a shaped product; in the third step, send the shaped product to 1000°C or 1800°C for sintering at a high temperature to obtain a high-density, high-density sapphire. Dimensional alumina material.

Embodiment 3

[0022] Embodiment 3: As the optimization of above-mentioned embodiment, raw material also comprises dispersant and sapphire scrap, wherein, dispersant is acrylic acid, polycarboxylic acid, ester polymer organic solvent, and dispersant is 0.01% to 1% by weight percentage %, sapphire scraps are 0% to 90%, and the balance is alumina powder and alumina polycrystalline ingot crushed crystals.

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Abstract

The invention relates to the technical field of sapphire crystal, and relates to a high-density large-size alumina material for sapphire and a preparation method of the material. The raw materials ofthe high-density large-size alumina material for sapphire comprise alumina powder, alumina polycrystalline-ingot broken crystals and sapphire leftover materials. The preparation method comprises the following steps: mixing the alumina polycrystalline-ingot broken crystals, the sapphire leftover materials and water, pouring the mixture into a mould, carrying out natural drying for molding, and carrying out sintering in a high-temperature furnace to obtain the material. According to the invention, the alumina polycrystalline-ingot broken crystals and the sapphire leftover materials are used as raw materials for mixing with the alumina powder for the first time, and natural drying for molding is carried out to obtain the molded product. The high-density and large-size alumina material for sapphire provided by the invention has the characteristics of large density, high production efficiency, large size, easily adjustable shape, higher alumina content, and higher recycling rate of the sapphire leftover materials, and meanwhile, the preparation process is simple, and the production cost is low.

Description

technical field [0001] The invention relates to the technical field of sapphire crystals, and relates to a high-density and large-size alumina material for sapphire and a preparation method thereof. Background technique [0002] Sapphire crystal is a single crystal of high-purity alumina, which is mainly used for LED substrate materials and window materials, and is widely used in LED, watch dial, aviation, aerospace, precision manufacturing, military industry and other fields. With the improvement of science and technology and the expansion of sapphire application fields, the current sapphire production technology is developing towards large sizes. How to increase the density of sapphire raw materials and the amount of furnace charging has become a key technology for obtaining large-size sapphire crystals. At present, the alumina raw materials for sapphire crystals are mostly in the form of pellets, cakes, and polycrystalline ingots. In terms of alumina content and density,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/622C04B35/64
CPCC04B35/10C04B35/622C04B35/62204C04B35/64C04B2235/6022C04B2235/606C04B2235/77
Inventor 洪涛郭敏
Owner 新疆三锐佰德新材料有限公司
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