Sintering mechanism and microwave dielectric properties of Bi12 TiO20 ceramics

Byoung Jik Jeong, Mi Ri Joung, Jin Seong Kim, Sahn Nahm, Ji Won Choi, Seong Ju Hwang

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

A homogeneous Bi12TiO20 phase was developed in a specimen that was calcined at 700°C without the formation of a secondary phase. A small amount of the Bi12TiO20 phase melted during sintering and assisted the densification of the specimen. The Bi 2O3 and Bi8TiO14 secondary phases were found in all specimens. All the specimens that were sintered at temperatures ≥775°C exhibited high relative densities above 98% of the theoretical density. The Q × f value of the Bi12TiO 20 ceramics was influenced by the grain size. The Bi 12TiO20 ceramics sintered at 800°C for 5 h showed promising microwave dielectric properties of εr = 41, Q × f = 10 400 GHz, and τf = -10.8 ppm/°C.

Original languageEnglish
Pages (from-to)3742-3746
Number of pages5
JournalJournal of the American Ceramic Society
Volume96
Issue number12
DOIs
Publication statusPublished - 2013 Dec

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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