Investigation of the relations between structure and microwave dielectric properties of divalent metal tungstate compounds

Sung Hun Yoon, Dong Wan Kim, Seo Yong Cho, Kug Sun Hong

Research output: Contribution to journalArticle

200 Citations (Scopus)

Abstract

The microwave dielectric characteristics of AWO4 (A = Mg, Zn, Mn, Ca, Sr, Ba) compounds and their relations with structure have been investigated as a function of A cations. Crystal structure was investigated by XRD; the structure changed from wolframite to scheelite with increasing size of A cation. Dielectric properties such as permittivity, temperature coefficient of resonant frequency (τf), and quality factors (Q × f) were found to be correlated with the size of A cations and the structure of compounds. Permittivity decreased with the size of A cations, and temperature coefficient of resonant frequency was correlated with unit cell volume. AWO4 compounds are suitable for the applications of low-k dielectric materials; permittivity = 8-15, τf = -50 to -70, and Q × f = 60,000-70,000.

Original languageEnglish
Pages (from-to)2051-2054
Number of pages4
JournalJournal of the European Ceramic Society
Volume26
Issue number10-11
DOIs
Publication statusPublished - 2006
Externally publishedYes

Keywords

  • Dielectric properties
  • Microwave processing
  • Sintering
  • Substrates
  • Tungstate

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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