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Method for preparing wear-resistant aluminum oxide ceramic

A technology of alumina ceramics and ball milling, which is applied in the field of preparation of wear-resistant alumina ceramics, can solve the problems of high price, and achieve the effect of being conducive to industrial production and simple process

Inactive Publication Date: 2015-04-22
GUILIN UNIVERSITY OF TECHNOLOGY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] With the continuous development of the domestic high-tech industry, the demand for high-grade, multi-variety, and excellent wear-resistant alumina ceramics is increasing day by day, but the high-end alumina ceramic parts and alumina ceramic balls currently on the market And some other alumina ceramic products are relatively expensive, and the market is controlled by developed countries such as Europe, America and Japan, while most of our products are medium and low-end products. With the country's demand for alumina ceramics with excellent wear resistance With the increasing quantity, there is an urgent need to independently develop high-end alumina ceramic products with simple preparation process, low production cost, high purity and excellent wear resistance to meet the requirements of industrialized mass production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] (1) The mass percentage of raw materials is: α- al 2 o 3 Powder 96%, 0.8% kaolin, 0.5% limestone, 0.7% magnesite, 1.0% Sm 2 o 3 , 1.0% triammonium citrate.

[0019] (2) Put the raw materials in step (1) into a ball mill and mix them for 35 hours.

[0020] (3) Dry the slurry obtained in step (2) at 110°C for 8 hours.

[0021] (4) The product obtained in step (3) was isostatically pressed under a pressure of 80MP, and kept under pressure for 10 minutes to obtain a spherical green body.

[0022] (5) Sinter the spherical green body obtained in step (4) at 1600°C and keep it warm for 70 minutes; cool down with the furnace temperature and drop to room temperature to obtain a wear-resistant alumina ceramic material.

[0023] According to JC / T848.1-1999, the obtained wear-resistant alumina ceramic material was tested, and the wear rate of the obtained wear-resistant alumina ceramic material was 0.02‰, reaching the industry standard (≤0.3‰).

Embodiment 2

[0025] (1) The mass percentage of raw materials is: α- al 2 o 3 Powder 90%, 3.8% kaolin, 2.5% calcite, 1.5% dolomite, 1.6% Sm 2 (CO 3 ) 3 , 0.6% polyethylene glycol.

[0026] (2) Put the raw materials in step (1) into a ball mill and mix them for 40 hours.

[0027] (3) Dry the slurry obtained in step (2) at 120°C for 12 hours.

[0028] (4) The product obtained in step (3) was isostatically pressed under a pressure of 80MP, and kept under pressure for 10 minutes to obtain a spherical green body.

[0029] (5) Sinter the spherical green body obtained in step (4) at 1450°C and keep it warm for 70 minutes; cool down with the furnace temperature and drop to room temperature to obtain a wear-resistant alumina ceramic material.

[0030] According to JC / T848.1-1999, the obtained wear-resistant alumina ceramic material was tested, and the wear rate of the obtained wear-resistant alumina ceramic material was 0.04‰, reaching the industry standard (≤0.3‰).

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Abstract

The invention discloses a method for preparing wear-resistant aluminum oxide ceramic. The wear-resistant aluminum oxide ceramic comprises the following components in percentage by mass: 84-98% of aluminum oxide, 0.1-3% of a rare earth samarium compound, 1-15% of sintering aids and 0-2.0% of a surfactant, wherein the sum of percentage by mass of all the raw materials is 100%, the sintering aids are compounds of calcium, magnesium and silicon or minerals and the surfactant is one of tri-ammonium citrate, ammonium polyacrylate, polyethylene imine, polyethylene glycol, polycarboxy ammonium and chitosan. The method comprises the following stops of placing the raw materials in a ball mill and mixing the raw materials for 5-72 hours to obtain slurry; molding the obtained slurry to obtain a spherical green body; sintering the green body at 1000-1600 DEG C, carrying out heat preservation for 30-300 minutes and cooling in a furnace. The finished product is tested according to JC / T848.1-1999, the wear loss is 0.1-0.5% which reaches the industry standard (less than or equal to 3%). A general industrial device is adopted and the process is simple and is convenient to industrial production.

Description

technical field [0001] The invention relates to a preparation method of wear-resistant alumina ceramics. Background technique [0002] With the continuous development of the domestic high-tech industry, the demand for high-grade, multi-variety, and excellent wear-resistant alumina ceramics is increasing day by day, but the high-end alumina ceramic parts and alumina ceramic balls currently on the market And some other alumina ceramic products are relatively expensive, and the market is controlled by developed countries such as Europe, America and Japan, while most of our products are medium and low-end products. With the country's demand for alumina ceramics with excellent wear resistance With the increasing quantity, there is an urgent need to independently develop high-end alumina ceramic products with simple preparation process, low production cost, high purity and excellent wear resistance to meet the requirements of industrialized mass production. Contents of the inven...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/10C04B35/622
Inventor 吴洋吴伯麟
Owner GUILIN UNIVERSITY OF TECHNOLOGY