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

共 12 条

[1] HYDROTALCITE-TYPE ANIONIC CLAYS: PREPARATION, PROPERTIES AND APPLICATIONS
Cavani, F.
Trifiro, F.
Vaccari, A.
[J]. CATALYSIS TODAY, 1991, 11 (02) : 173 - 301
[2] de Roy A., 1991, Expanded Clays and Other Microporous Solids, P108, DOI [DOI 10.1007/978-1-4684-8866-1_7, 10.1007/978-1-4684-8866-1_7]
[3] Cobalt-iron hydroxycarbonates and their evolution to mixed oxides with spinel structure
del Arco, M
Trujillano, R
Rives, V
[J]. JOURNAL OF MATERIALS CHEMISTRY, 1998, 8 (03) : 761 - 767
[4] A FTIR SPECTROSCOPIC STUDY OF SURFACE-ACIDITY AND BASICITY OF MIXED MG, AL-OXIDES OBTAINED BY THERMAL-DECOMPOSITION OF HYDROTALCITE
DELARCO, M
MARTIN, C
MARTIN, I
RIVES, V
TRUJILLANO, R
[J]. SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY, 1993, 49 (11): : 1575 - 1582
[5] THERMAL-CONVERSION OF A LAYERED (MG/AL) DOUBLE HYDROXIDE TO THE OXIDE
HUDSON, MJ
CARLINO, S
APPERLEY, DC
[J]. JOURNAL OF MATERIALS CHEMISTRY, 1995, 5 (02) : 323 - 329
[6] Thermal behaviour of hydrotalcite-like compounds: study of the resulting oxidic forms
Jitianu, M
Balasoiu, M
Marchidan, R
Zaharescu, M
Crisan, D
Craiu, M
[J]. INTERNATIONAL JOURNAL OF INORGANIC MATERIALS, 2000, 2 (2-3): : 287 - 300
[7] Thermal behavior of the hydrotalcite-like layered structure of Mg and Al-layered double hydroxides with interlayer carbonate by means of in situ powder HTXRD and DTA/TG
Kanezaki, E
[J]. SOLID STATE IONICS, 1998, 106 (3-4) : 279 - 284
[8] Thermal evolution of chromium(III) ions in hydrotalcite-like compounds
Labajos, FM
Rives, V
[J]. INORGANIC CHEMISTRY, 1996, 35 (18) : 5313 - 5318
[9] SYNTHESES OF HYDROTALCITE-LIKE COMPOUNDS AND THEIR STRUCTURES AND PHYSICOCHEMICAL PROPERTIES .1. SYSTEMS MG2+-AL3+-NO-3,MG2+-AL3+-CL-,MG2+-AL3+-CLO-4,NI2P-AL3+-CL- AND ZN2+-AL3+-CL-
MIYATA, S
[J]. CLAYS AND CLAY MINERALS, 1975, 23 (05) : 369 - &
[10] NEBOTDIAZ I, 2001, THESIS U JAUME 1 CAS

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