Influence of doping on the sintering and microstructure of high purity ARumna ceramics

被引：0

作者：

Li, CG ^{[1
]}

Si, WJ ^{[1
]}

Miao, HZ ^{[1
]}

机构：

[1] Tsinghua Univ, Dept Mat Sci & Engn, Beijing 100084, Peoples R China

来源：

RARE METAL MATERIALS AND ENGINEERING | 2003年 / 32卷

关键词：

doping; sintering rate; high purity alumina ceramics;

D O I：

暂无

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The influence of doping with three oxides(CuO, Y2O3 and MgO) on the sintering and microstructure of high purity alumina ceramics were studied in this paper. Shrinkage at various temperatures was tested and sintering rates were obtained. SEM observed microstructures sintered at 1350 degreesC. The results showed that doping of CuO decreased while doping Of Y2O3 increased the temperature at which the largest sintering rate could be obtained. Grain size of alumina ceramic doped by CuO was larger than that of pure alumina ceramic while those of alumina ceramics doped by MgO or Y2O3 were smaller than that of pure alumina ceramic. It may be due to that CuO and Al2O3 can form eutectic at low temperature and this helps the sintering and grain growth of high purity alumina ceramics. While Segregation of MgO or Y2O3 at grain boundary inhibits the sintering and grain growth.

引用

页码：53 / 56

页数：4

共 7 条

[1] Coble R.L., 1962, U.S. Patent, Patent No. [US 3026210, 3026210]
[2] HUO ZW, 2001, B CHINESE SILICATE S, V2, P8
[3] Two kinds of roles of MgO in the densification and grain growth of alumina under various atmospheres: Sensitive and insensitive roles to the experimental procedures
Ikegami, T
Eguchi, K
[J]. JOURNAL OF MATERIALS RESEARCH, 1999, 14 (02) : 509 - 517
[4] Mehmet A., 1999, J AM CERAM SOC, V82, P1849
[5] Ning JW, 2002, RARE METAL MAT ENG, V31, P454
[6] Friction reduction by adding copper oxide into alumina and zirconia ceramics
Pasaribu, HR
Sloetjes, JW
Schipper, DJ
[J]. WEAR, 2003, 255 : 699 - 707
[7] Sintered microstructure and mechanical properties of high purity alumina ceramics made by high-speed centrifugal compaction process
Suzuki, HY
Shinozaki, K
Kuroki, H
Tashima, S
[J]. NOVEL SYNTHESIS AND PROCESSING OF CERAMICS, 1999, 159-1 : 187 - 192

← 1 →