Estudio de la descomposición térmica de compuestos tipo hidrotalcita

  1. Nebot Díaz, Isaac 2
  2. Rives Arnau, Vicente 3
  3. Rocha, J. 1
  4. Carda Castelló, Juan Bautista 2
  1. 1 Universidade de Aveiro
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    Universidade de Aveiro

    Aveiro, Portugal

    ROR https://ror.org/00nt41z93

  2. 2 Universitat Jaume I
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    Universitat Jaume I

    Castelló de la Plana, España

    ROR https://ror.org/02ws1xc11

  3. 3 Universidad de Salamanca
    info

    Universidad de Salamanca

    Salamanca, España

    ROR https://ror.org/02f40zc51

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Revista:
Boletín de la Sociedad Española de Cerámica y Vidrio

ISSN: 0366-3175

Ano de publicación: 2002

Volume: 41

Número: 4

Páxinas: 411-414

Tipo: Artigo

DOI: 10.3989/CYV.2002.V41.I4.674 DIALNET GOOGLE SCHOLAR lock_openAcceso aberto editor

Outras publicacións en: Boletín de la Sociedad Española de Cerámica y Vidrio

Obxectivos de Desenvolvemento Sustentable

Resumo

Thermal decomposition of hydrotalcite-like compounds with formula Mgx Al1-x(CO3 )x/2·nH2 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 ºC 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 27Al Nuclear Magnetic Resonance (27Al-MAS-NMR) Main results show that the optimum molar ratio (x) to hydrotalcite phase formation is between 0.20 and 0.35, obtaining spinel (MgAl2 O4 ) and Periclase (MgO) as the decomposition compounds.

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Información de financiamento

Asimismo, al proyecto MAT-2000-1148- C02-01 del MCyT por el apoyo económico prestado.

Financiadores

  • MCYT Spain
    • MAT-2000-1148- C02-01

Referencias bibliográficas

  • F.Cavani, F.Trifiro, A.Vaccari “Hydrotalcite-type anionic clays: preparation, properties and applications” Catal.Today 11 pp.173-301 (1991).
  • A. de Roy, C.Forano, K.El-Malki, J.P.Besse, “Anionic Clays: Trends in Pillaring Chemistry” in Expanded Clays and Other Microporous Solids, ed. M.L.Ocelli and H.E.Robson, Van Nostrand Reinhold, New York pp.108-169 (1992).
  • V.Rives “Study of Layered Double Hydroxides by Thermal Methods” in Layered Double Hydroxides: Present and Future, ed. V.Rives, Nova Science Publisher Inc. New York pp.115-132 (2001).
  • S.Miyata “The synthesis of hydrotalcite-like compounds and their structures and physicochemical properties” Clays and Clay Minerals 23 pp.369-375 (1975).
  • M.del Arco, C.Martin, I.Martin, V.Rives, R.Trujillano “A FTIR spectroscopic study of surface acidity and basicity of mixed Mg,Al-oxides obtained by thermal decomposition of hydrotalcite” Spectrochimica acta 49A(11) pp.1575-1582 (1992).
  • M.J.Hudson, S.Carlino, D.C. Apperley “Thermal conversion of a layered (Mg/Al) double hydroxide to the oxide” J.Mater.Chem. 5(2) pp.323-329 (1995).
  • F.M.Labajos, V.Rives “Thermal evolution of chromium(III) ions in hydrotalcite-like compounds” Inorg.Chem. 35 pp.5313-5318 (1996).
  • M.del Arco, R.Trujillano, V.Rives “Cobalt-iron hydroxicarbonates and their evolution to mixed oxides with spinel structure” J.Mater.Chem. 8(3) pp.761- 767 (1998).
  • E.Kanezaki “Thermal behaviour 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” Solid State Ionics 106 pp.279-284 (1998).
  • M.Jitianu, M.Balasoiu, R.Marchidan, M.Zaharescu, D.Crisan, M.Craiu “Thermal behaviour of hydrotalcite-like compounds: study of the resulting oxidic forms” Int. Journal of Inorg. Mater. 2 pp.287-300 (2000).
  • J.Rocha, M. del Arco, V.Rives, M.A.Ulibarri “Reconstruction of layered double hydroxides from calcined precursors: a Powder XRD and 27AlMASNMR study” J.Mater.Chem. 9 pp.2499-2503 (1999).
  • I.Nebot-Díaz “Estudio y caracterización de compuestos tipo espinela mediante rutas de síntesis no convencionales. Aplicación a la industria cerámica” Tesis doctoral, Universitat Jaume I, Castellón (España) 2001.
Fonte de datos: Dialnet