Reaction Sintering of Zinc Ferrite During Constant Rates of Heating
Green, David J. and Halloran, John and Johnson, David W. and Klein, Lisa
The reaction sintering of equimolar quantities of zinc oxide and ferric oxide was investigated under conditions of constant rates of heating and the data were compared with those for a calcined, single-phase zinc ferrite powder. For the heating rate of 1C/min, the densifications of the reaction-sintered sample and the calcined sample were approximately the same. However, as the heating rate increased, the density at any temperature increased slightly for the reaction-sintered sample but decreased slightly for the calcined powder. the factors responsible for this slight difference in sintering between the reaction-sintered sample and the calcined sample are discussed. For the constant heating rates used, the reaction was completed prior to any significant densification. Relative densities of >95% were obtained for both the reaction-sintered sample and the calcined sample under identical sintering conditions (1-10C/min to 1350C). Reaction sintering in a steep temperature gradient produced a nearly fully dense body prior to complete reaction; a composite microstructure consisting of fine zinc oxide grains in matrix of zinc ferrite was obtained.
M. N. Rahaman and L. C. De Jonghe, "Reaction Sintering of Zinc Ferrite During Constant Rates of Heating," Journal of the American Ceramic Society, Wiley-Blackwell, Jan 1993.
The definitive version is available at http://dx.doi.org/10.1111%2fj.1151-2916.1993.tb06642.x
Materials Science and Engineering
Keywords and Phrases
Iron; Iron Oxide; Magnetic Materials; Microstructures; Physical Properties; Relative Density; Temperature Gradient; Zinc; Zinc Oxide
Article - Journal
© 1993 Wiley-Blackwell, All rights reserved.