Synthesis and characterization of NiFe2O4 nanopowders via spray pyrolysis

Dae Soo Jung, Hee Chan Jang, Man Jong Lee, Kyeong Youl Jung, Yun Chan Kang

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

NiFe2O4 powders with large-sized, hollow, and thin wall structures were directly prepared by spray pyrolysis from a spray solution containing citric acid. These as-prepared powders converted into nanosized NiFe2O4 powders after post-treatment at high temperatures between 600 and 1000°C. Phase-pure NiFe2O4 powders were obtained at post-treatment temperatures between 700 and 1000°C. When the post-treatment temperatures were increased from 700 to 1000°C, the BET surface areas of the NiFe2O4 powders decreased from 23.4 to 11.8 m2/g and their mean sizes increased from 47.8 to 94.7 nm, respectively. The saturation magnetizations of the powders changed from 32 to 44 emu/g according to changes in the post-treatment temperatures. The coercivities of the powders post-treated at temperatures of 700 and 800°C were 118 and 130 Oe, respectively.

Original languageEnglish
Pages (from-to)1069-1073
Number of pages5
JournalJournal of the Ceramic Society of Japan
Volume117
Issue number1370
DOIs
Publication statusPublished - 2009 Oct

Keywords

  • Nano powder
  • Nickel ferrite
  • Spray pyrolysis

ASJC Scopus subject areas

  • Ceramics and Composites
  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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