Influence of Nb2O5 additive on the densification and microstructural evolution of fine alumina powders

被引：23

作者：

Hsu, YF ^{[1
]}

机构：

[1] Natl Taiwan Univ, Dept Mat Sci & Mineral Resources Engn, Taipei, Taiwan

来源：

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2005年 / 399卷 / 1-2期

关键词：

densification; microstructural evolution; dopant; sintering;

D O I：

10.1016/j.msea.2005.03.101

中图分类号：

TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

The effect of Nb2O5 additive on the densification and microstructural evolution of fine alumina powders has been investigated. The dopant concentration added ranged from 0.5 to 2.0 mol%. It was observed that the doping of WO, improved the densitication of alumina. Besides, the sintering temperature could be lowered about 100-150 C by doping a small amount of Nb2O5 for sintering at the same period. In addition, the Nb2O5 dopant promoted the grain growth of alumina and second-phase AlNbO4 particles were generated in the doped samples, (c) 2005 Elsevier B.V. All rights reserved.

引用

页码：232 / 237

页数：6

共 21 条

[1]

Averback R. S., 1992, Nanostructured Materials, V1, P173, DOI 10.1016/0965-9773(92)90072-6

[2]

Bae IJ, 1997, J AM CERAM SOC, V80, P1149

[3] CRITICAL CONCENTRATION OF MGO FOR THE PREVENTION OF ABNORMAL GRAIN-GROWTH IN ALUMINA [J].

BAE, SI ;

BAIK, S .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1994, 77 (10) :2499-2504

[4] SINTERING AND GRAIN-GROWTH OF ULTRAPURE ALUMINA [J].

BAE, SI ;

BAIK, SG .

JOURNAL OF MATERIALS SCIENCE, 1993, 28 (15) :4197-4204

[5]

BENNISON SJ, 1983, J AM CERAM SOC, V66, pC90, DOI 10.1111/j.1151-2916.1983.tb10065.x

[6] SWELLING OF HOT-PRESSED AL2O3 [J].

BENNISON, SJ ;

HARMER, MP .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1985, 68 (11) :591-597

[7] Effect of additives on the densification and microstructural development of low-grade alumina powders [J].

Erkalfa, H ;

Misirli, Z ;

Baykara, T .

JOURNAL OF MATERIALS PROCESSING TECHNOLOGY, 1996, 62 (1-3) :108-115

[8]

HSU YF, 2003, MAT SCI ENG A-STRUCT, V362, P313

[9]

KOSTIC E, 1990, POWDER METALL INT, V22, P29

[10] High pressure low temperature sintering of nanocrystalline alumina [J].

Liao, SC ;

Chen, YJ ;

Kear, BH ;

Mayo, WE .

NANOSTRUCTURED MATERIALS, 1998, 10 (06) :1063-1079

← 1 2 3 →