Tuning Al2O3 crystallinity under supercritical fluid conditions:: Effect on sintering

被引：24

作者：

Bousquet, C. ^{[1
]}

Elissalde, C. ^{[1
]}

Aymonier, C. ^{[1
]}

Maglione, M. ^{[1
]}

Cansell, F. ^{[1
]}

Heintz, J. M. ^{[1
]}

机构：

[1] Univ Bordeaux 1, Inst Chim Mat Condensee Bordeaux, ICMCB, CNRS, F-33608 Pessac, France

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2008年 / 28卷 / 01期

关键词：

Al2O3; sintering; powders-chemical preparation; supercritical fluids;

D O I：

10.1016/j.jeurceramsoc.2007.06.005

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：

Supercritical fluids have been used to prepare alumina powders. This versatile technique allows the tuning of the crystallinity of the obtained powders by a simple modification of the fluid's nature. Amorphous or boehmite alumina could be successfully synthesised using either CO2/Ethanol or H2O/Ethanol, respectively. The two powders present very different sintering paths, which have been correlated to the grain morphology and crystalline state of the powders. We have established that the alumina elaborated in CO2/ethanol exhibited a significant decrease of the gamma-Al2O3 -> alpha-Al2O3 transition temperature resulting in a lower densification temperature. (c) 2007 Elsevier Ltd. All rights reserved.

引用

页码：223 / 228

页数：6

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