Vacancy ordering in the structure of γ-Al2O3

被引：40

作者：

Kryukova, GN ^{[1
]}

Klenov, DO ^{[1
]}

Ivanova, AS ^{[1
]}

Tsybulya, SV ^{[1
]}

机构：

[1] SBRAS, Boreskov Inst Catalysis, Novosibirsk 630090, Russia

来源：

JOURNAL OF THE EUROPEAN CERAMIC SOCIETY | 2000年 / 20卷 / 08期

基金：

俄罗斯基础研究基金会;

关键词：

Al2O3; calcination; catalysts; defects; diffusion;

D O I：

10.1016/S0955-2219(99)00278-2

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：

Defect structure of gamma-Al2O3 prepared by the thermal decomposition of well-crystallized, high purity boehmite (gamma-AlOOH) has been studied by HREM. It was shown that the intrinsic feature of gamma-alumina structure is a presence of almost hexagonal closed loops formed due to the ordering of cation vacancies over octahedral positions on (110) and (111) planes. These defects are relatively stable they are preserved, though being changed in shape, in the gamma-alumina sample upon its further calcination until the appearance of traces of delta-alumina phase. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：1187 / 1189

页数：3

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