Ultralow dielectric constant nickel-zinc ferrites using microwave sintering

Ramesh Peelamedu, Craig Grimes, Dinesh Agrawal, Rustum Roy, Purushotham Yadoji

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90 Scopus citations


Ultralow dielectric constant values were measured on Ni-Zn ferrites prepared using Fe2O3 as a starting material and sintered in a microwave field. Significant differences in microstructure, magnetic, and dielectric properties were observed between microwave-sintered Ni-Zn ferrites prepared using Fe3O4 (T34) and those starting with Fe 2O3 (T23) ingredients. Higher magnetization values observed in T23 ferrite are attributed to large grain size, possibly containing abundant domain walls and the presence of fewer Fe2+ ions. The ultralow dielectric constant values observed on T23 ferrites show that this procedure is highly suitable to prepare Ni-Zn ferrites for high-frequency switching applications.

Original languageEnglish (US)
Pages (from-to)2292-2295
Number of pages4
JournalJournal of Materials Research
Issue number10
StatePublished - Oct 2003

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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