Densification ability of combustion-derived Al2O3 powders

被引：24

作者：

Ganesh, Ibram ^{[1
,2
]}

Torres, Paula M. C. ^{[1
]}

Ferreira, J. M. F. ^{[1
]}

机构：

[1] Univ Aveiro, CICECO, Dept Ceram & Glass Engn, P-3810193 Aveiro, Portugal

[2] Int Adv Res Ctr Powder Met & New Mat ARCI, Ctr Adv Ceram, Hyderabad 500005, Andhra Pradesh, India

来源：

CERAMICS INTERNATIONAL | 2009年 / 35卷 / 03期

关键词：

MgO; Combustion synthesis; alpha-Al2O3; Boehmite; Sucrose; Urea; Sintering behaviour; Microstructure; ALPHA-ALUMINA; NANOCRYSTALLINE MGAL2O4; SPINEL;

D O I：

10.1016/j.ceramint.2008.05.011

中图分类号：

TQ174 [陶瓷工业]; TB3 [工程材料学];

学科分类号：

0805 ; 080502 ;

摘要：

Nanocrystalline Al2O3 powders containing different amounts of MgO (0.1-5.0 mol%) or added boehmite (AlOOH) have been synthesized by combustion synthesis from aluminium nitrate and magnesium nitrate, using urea or sucrose as fuels. The as synthesized alumina powders were deagglomerated, compacted by dry pressing and sintered at 1625 degrees C for 2 h. For comparison purposes, a commercial high purity alpha-Al2O3 powder (ACC) was also processed following the same route. The sintered materials were characterized for bulk density (BD), apparent porosity (AP), and water absorption (WA) capacity, microstructure using SEM, and XRD phase composition. In comparison to boehmite, the MgO had a considerable effect on the densification behaviour of combustion-synthesized powder. (C) 2008 Elsevier Ltd and Techna Group S.r.l. All rights reserved.

引用

页码：1173 / 1179

页数：7

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