Powder characterization and sinterability of hydrothermally synthesized Mn-Zn ferrites

Wen Hao Lin, Shiuh Ke Jang Jean, Chii Shyang Hwang

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

Ultrafine Mn-Zn ferrite powders were synthesized under mild hydrothermal conditions by precipitation from metal nitrates with an aqueous ammonia. R value (alkalinity) was introduced to adjust the amount of added ammonia. A method of controlling the desired compositions and crystallite sizes of synthesized powders was proposed in this paper. In addition, the effect of R value and hydrothermal time on powder characterization, such as the Mn/Zn ratio in spinel structure of synthesized powders, variation of X-ray diffraction angle of spinel ferrites, crystallite size and the loss ratio of Zn2+ for different starting suspensions during hydrothermal process, was also investigated. Powders upon hydrothermal treatment exhibited superior sinterability as compared to powders which were not subjected to hydrothermal treatment. High densities, 99.4-99.8% of theoretical densities, were obtained upon sintering green ferrite powders at relatively low temperature (900-950°C) in N2 atmosphere without any sintering aids.

Original languageEnglish
Pages (from-to)10-16
Number of pages7
JournalJournal of the Ceramic Society of Japan
Volume108
Issue number1
DOIs
Publication statusPublished - 2000

All Science Journal Classification (ASJC) codes

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

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