Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 20    No. 6    June 2010

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Structural macrokinetics of synthesizing ZnFe2O4 by mechanical ball milling
ZHAO Zhong-wei(赵中伟)1, OUYANG Kingsam(欧阳全胜)1, WANG Ming(王 明)1, 2

1. School of Metallurgical Science and Engineering, Central South University, Changsha 410083, China;
2. Changsha Engineering and Research Institute of Nonferrous Metallurgy, Changsha 410011, China

Abstract:Powder mixtures of Fe2O3 and ZnO were milled in a high-energy planetary ball mill to synthesize ZnFe2O4 and X-ray powder diffractometry was used to obtain the relative content of phases, crystallite size and microstrain of both Fe2O3 and ZnFe2O4. The lattice constants of Fe2O3 were obtained by cell refinement method. The macrokinetics and the structure evolution of matters were studied and the results show that the dynamics process of mechanochemical synthesis of ZnFe2O4 fits Avrami-Erofe’ev model and is controlled by a nucleation-growth mechanism, and the structural macrokinetics theory in combustion synthesis research area could be used to describe the kinetic process as well.

 

Key words: mechanochemistry; ball milling; combustion synthesis; structural macrokinetics; kinetics model; ZnFe2O4

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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