Thermal decomposition study of hydrotalcite-like compounds

被引：4

作者：

Nebot-Díaz, I ^{[1
]}

Rives, V

Rocha, J

Carda, JB

机构：

[1] Univ Jaume 1, Dept Quim Inorgan & Organ, Castellon, Spain

[2] Univ Salamanca, Dept Quim Inorgan, E-37008 Salamanca, Spain

[3] Univ Aveiro, Dept Quim, P-3800 Aveiro, Portugal

来源：

BOLETIN DE LA SOCIEDAD ESPANOLA DE CERAMICA Y VIDRIO | 2002年 / 41卷 / 04期

关键词：

hydrotalcite; spinel; thermal decomposition;

D O I：

10.3989/cyv.2002.v41.i4.674

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：

Thermal decomposition of hydrotalcite-like compounds with formula MgxAl1-x(CO3)(x/2)(.)nH(2)O has been studied varying the molar ratio (x) between Mg and Al cations. Compounds synthesized by coprecipitation method at fixed pH, have been fired at different temperatures between 500 and 1200 degreesC with different remaining times. This study has been carried out by Differential Thermal and Thermogravimetric Analysis (DTA/TG), X-Ray Diffraction (XRD), Scanning Electron Microscopy (SEM) and Al-27 Nuclear Magnetic Resonance (Al-27-MAS-NMR) Main results show that the optimum molar ratio (x) to hydrotalcite phase formation is between 0.20 and 0.35, obtaining spinel (MgAl2O4) and Periclase (MgO) as the decomposition compounds.

引用

页码：411 / 414

页数：4

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