Articles
  • Analysis of the phase transformation of aluminum formate Al(O2CH)3 to α-alumina by Raman and infrared spectroscopy 
  • Simón Yobanny Reyes-Lópeza,*, Rosa Saucedo Acuñaa, Rigoberto López-Juárezb and Juan Serrato Rodríguezc
  • a Departamento. de Ciencias Químico Biológicas, Instituto de Ciencias Biomédicas, Universidad Autónoma de Ciudad Juárez. Anillo Envolvente del PRONAF y Estocolmo s/n, C.P. 32300,Cd. Juárez Chih, México b Instituto de Investigaciones en Materiales, Universidad Nacional Autónoma de México, Ciudad Universitaria, A.P. 70-360, C.P. 04510, México D.F, México c Instituto de Investigaciones Metalúrgicas, Universidad Michoacana de San Nicolás de Hidalgo, Santiago Tapia 403, C.P. 58000, Morelia, Mich, México
Abstract
A new simplified route to prepare crystalline alpha-alumina powders is proposed from the decomposition of aluminum formate Al(O2CH)(3) precursor following a process of gelation of Al(O2CH)(3) in an aqueous medium. Heat treated powders were characterized by XRD, Raman and infrared spectroscopy showing the presence of eta-Al2O3 at 1000 degrees C and the transformation to alpha-Al2O3 at 1100 degrees C, where SEM images of alpha-Al2O3 reveled an size of 1-2 mu m by the aggregated particles, and TEM images confirm a particles size of 200-300 nm. By other hand BET study showed that the specific surface area of eta-Al2O3 and the alpha-Al2O3 obtained is higher than the specific surface area reported for these materials (until 118 m(2)/g), ratify that this new route process at low temperature promote to obtain the powers with an excellent superficial area.

Keywords: alpha-alumina; Aluminum formate; Raman; Infrared spectroscopy

This Article

  • 2013; 14(5): 627-631

    Published on Oct 31, 2013