Estimation of the intrinsic stresses in α-alumina in relation with its elaboration mode

被引：8

作者：

Boumaza, A. ^{[1
]}

Djelloul, A. ^{[1
]}

机构：

[1] Ctr Univ Khenchela, Lab Struct Proprietes & Interact Inter Atom LASPI, Khenchela 40000, Algeria

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2010年 / 183卷 / 05期

关键词：

Alpha alumina; Boehmite; Gibbsite; PM2000; alloy; Infrared spectroscopy; X-ray diffraction; Cathodoluminescence; Oxygen vacancies; CR-AL ALLOYS; THERMAL-DECOMPOSITION; OXIDATION BEHAVIOR; RAMAN; PRESSURE; CORUNDUM; SCALES; SPECTROSCOPY; ACTIVATION; DEFLECTION;

D O I：

10.1016/j.jssc.2010.03.012

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

The specific signatures of alpha-Al2O3 by Fourier transform infrared (FIR) spectroscopy were investigated to estimate the intrinsic stress in this compound according to its elaboration mode. Thus, alpha-alumina was prepared either by calcination of boehmite or gibbsite and also generated by oxidation of a metallic FeCrAl alloy. FTIR results were mainly supported by X-ray diffraction (XRD) patterns that allowed to determine the crystallite size and the strain in the various alpha aluminas. Moreover, the infrared peak at 378.7 cm(-1) was used as a reference for stress free alpha-alumina and the shift of this peak allowed to estimate intrinsic stresses, which were related to the morphology and to the specific surface area of aluminas according to their elaboration mode. These interpretations were confirmed by results obtained by cathodoluminescence experiments. (C) 2010 Elsevier Inc. All rights reserved.

引用

页码：1063 / 1070

页数：8

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