Synthesis and characterization of nanocrystalline zinc ferrite

J.S. Jiang, X.L. Yang, L. Gao, J.K. Guo, Jianzhong Jiang

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Nanocrystalline zinc ferrite powders with a partially inverted spinel structure were synthesized by high-energy ball milling in a closed container at ambient temperature from a mixture of alpha-Fe2O3 and ZnO crystalline powders in equimolar ratio. From low-temperature and in-field Mossbauer measurements it is revealed that ZnFe2O4 particles prepared are in superparamagnetic state at ambient temperature. A doublet with an average quadrupole splitting of 0.8 nm/s is observed for the as-milled sample at 295 K, which is much larger than that for bulk ZnFe2O4 prepared by traditional ceramic method and that for ultrafine ZnFe2O4 particles prepared by the co-precipitation method. This indicates larger structural defects in the nanometer-sized ZnFe2O4 particles prepared by high-energy ball milling.
Original languageEnglish
JournalNanostructured Materials
Issue number1-4
Pages (from-to)143-146
Publication statusPublished - 1999

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