Paper Title:
Fe K-Edge XAFS Study of Slate Powders Heat Treated up to 1000°C
  Abstract

The use of ultra-bright, highly directional, high and variable energy associated to synchrotron radiation beams at SPring-8 when compared with conventional X-Ray diffraction analysis applied to slate powders heat treated at temperatures in the range of 600°C up to 1000°C is reported. Fe K-edge XAFS measurements of the products formed upon heating slate showed that in the temperature range 600-800°C, conversion of FeO present in the as-received slate powder into a mixed -Fe2O3/-Fe2O3 has occurred providing useful information on the short-range order atomic structure of the slate. Above 800°C, mainly -Fe2O3 was identified to be present in the slate. The change of the Fe valences within the slate network is most likely responsible for the detected colour change with the increasing temperature.

  Info
Periodical
Materials Science Forum (Volumes 636-637)
Edited by
Luís Guerra ROSA and Fernanda MARGARIDO
Pages
922-927
DOI
10.4028/www.scientific.net/MSF.636-637.922
Citation
F. A. C. Oliveira, H. Nitani, T. Nakagawa, T.A. Yamamoto, N. Shohoji, "Fe K-Edge XAFS Study of Slate Powders Heat Treated up to 1000°C", Materials Science Forum, Vols. 636-637, pp. 922-927, 2010
Online since
January 2010
Export
Price
$32.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

  | Authors: F.M. Lucas, Bruno Trindade, Benilde F.O. Costa, Gerard Le Caër
631
Authors: T. Matsukawa, K. Sugawara, Satoshi Tanaka, Nozomu Uchida, Keizo Uematsu, Yoshikazu Shinohara, Masato Uehara
77
Authors: V. Rajković, D. Božić, D. Vračarić, E. Romhanji
Abstract:Prealloyed copper powder containing 2.5wt. %Al was processed in a planetary ball mill to evaluate matrix hardening due to formation of Al2O3...
493
Authors: Katsumi Yoshida, Hideki Hyuga, Naoki Kondo, Hideki Kita
Abstract:Graphite powder was treated with lanthanum, aluminum and magnesium phosphate solution, and oxidation resistance of the obtained graphite...
133
Authors: M.C. Ferreira, Wilson Acchar, Ana M. Segadães, Sonia Regina Homem de Mello-Castanho
Abstract:Brazil has one of the world’s most important Bauxite deposits, the raw material for the aluminium extraction metallurgy. This work is...
773