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Preparation of phase homogeneous Mn–Zn ferrite powder by spray pyrolysis

Published online by Cambridge University Press:  31 January 2011

Xinyu Zhao ,
Baicun Zheng ,
Hongchen Gu ,
Chunzhong Li ,
Shi Chang Zhang  and
P. Darrell Ownby
Xinyu Zhao
Affiliation:
Institute of Technical Chemical Physics, East China University of Science and Technology, Shanghai, People's Republic of China
Baicun Zheng
Affiliation:
Institute of Technical Chemical Physics, East China University of Science and Technology, Shanghai, People's Republic of China
Hongchen Gu
Affiliation:
Institute of Technical Chemical Physics, East China University of Science and Technology, Shanghai, People's Republic of China
Chunzhong Li
Affiliation:
Institute of Technical Chemical Physics, East China University of Science and Technology, Shanghai, People's Republic of China
Shi Chang Zhang
Affiliation:
Department of Ceramic Engineering, University of Missouri–Rolla, Rolla, Missouri 65401
P. Darrell Ownby*
Affiliation:
Department of Ceramic Engineering, University of Missouri–Rolla, Rolla, Missouri 65401
*
a) Address all correspondence to this author.
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Abstract

Two kinds of aqueous precursor solutions are used to synthesize Mn–Zn ferrite powders: (i) nitrate (NO) precursor—derived from solutions of Mn(NO3)2, Zn(NO3)2, and Fe(NO3)3; and (ii) acetate (AC) precursor—derived from solutions of Mn(CH3COO)2, Zn(CH3COO)2, and Fe(NO3)3. The composition of the powders synthesized from the precursor AC is very uniform, whereas powders derived from the precursor NO have Mn and Zn segregated on the particle surfaces. In addition, the powders synthesized from precursor AC are solid spherical particles with fine porosity, whereas many hollow and fragmented particles are observed in the powder derived from precursor NO. Overall, the properties of Mn–Zn ferrite cores prepared from the precursor AC are superior to those prepared from the precursor NO. The reasons for the differences are explained and described in detail. The AC precursor powders synthesized by spray pyrolysis produced Mn–Zn ferrite cores with good magnetic properties.

Type
Articles
Information
Journal of Materials Research , Volume 14 , Issue 7 , July 1999 , pp. 3073 - 3082
Copyright
Copyright © Materials Research Society 1999

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