INVESTIGADORES
FARFAN TORRES Elsa Monica
artículos
Título:
Zirconium Titanate from Sol-Gel Synthesis Thermal Decomposition and Quantitative Phase
Autor/es:
E.L. SHAM; M.A. GARCIA ARANDA; E.M. FARFAN TORRES; J.C. GOTTIFREDI; M. MARTINEZ-LARA; S. BRUQUE-GAMEZ
Revista:
JOURNAL OF SOLID STATE CHEMISTRY
Editorial:
ACADEMIC PRESS INC ELSEVIER SCIENCE
Referencias:
Lugar: Amsterdam; Año: 1998 vol. 139 p. 225 - 232
ISSN:
0022-4596
Resumen:
Oxides precursors ZrxTi1-xO2 (x 0 0.22, 0.39 and 0.60) were prepared by a hydrolytic sol-gel process. The amorphous mixed oxides are homogeneous as deduced from electron microscopy and XPS studies. The crystallization of these amorphous oxides was studied by TG-DTA and thermodiffractometry. Quantitative analysis of the crystalline phases, obtained at 1000ºC, was carried out by Rietveld method. The samples are mixtures of TiO2, Zr5Ti7O24, and ZrO2 oxides, and stoichiometry of the stable zirconium titanate phase was found to be Zr5Ti7O24 and not ZrTiO4 (=Zr6Ti6O24). In this work, the power of Rietveld refinements to determine phase ratios of very related (and thus very overlapped) phases is shown.
