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

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    16 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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