Microstructure and microwave dielectric properties of Bi 12SiO 20 ceramics

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

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Bi 12SiO 20 ceramics were well sintered at 800°C after calcination at 700°C. A liquid phase of composition Bi 2O 3 was formed during the sintering at temperatures ≥800°C and assisted the densification of the Bi 12SiO 20 ceramics. When the sintering temperature exceeded 800°C, however, the relative density, ε r, and Q × f values of the Bi 12SiO 20 ceramics decreased, probably due to the formation of a large amount of the liquid phase. The Bi 12SiO 20 ceramics sintered at 800°C for 5.0 h exhibited excellent microwave dielectric properties with a high ε r of 43, a high Q × f of 86,802 GHz and a small τ f of -10.39 ppm/°C.

Original languageEnglish
Pages (from-to)4510-4513
Number of pages4
JournalMaterials Research Bulletin
Volume47
Issue number12
DOIs
Publication statusPublished - 2012 Dec 1

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering

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