Formation process and microwave dielectric properties of the R 2V2O7 (R=Ba, Sr, and Ca) ceramics

Mi Ri Joung, Jin Seong Kim, Myung Eun Song, Sahn Nahm, Jong Hoo Paik

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52 Citations (Scopus)

Abstract

Formation process and microwave dielectric properties of the R 2V2O7 (R=Ba, Sr, and Ca) ceramics were investigated. Transient RV2O6 phases, which were formed at 300°∼500°C by the reaction of RCO3 and V 2O5, interacted with remnant RCO3 to form the homogeneous triclinic R2V2O7 phases at 600°-700°C. The Sr2V2O7 and Ca 2V2O7 ceramics sintered at 1000° and 950°C, respectively, for 10 h showed a dense microstructure with the microwave dielectric properties of εr=10.4-12.1, Q × f=15 200-19 520 GHz, and τf=-30.9-34.8 ppm/°C. However, the Ba2V2O7 ceramic was well sintered at 900°C for 10 h and it showed the good microwave dielectric properties of εr=10.1, Q × f=51 630 GHz, and τf=-26.5 ppm/°C.

Original languageEnglish
Pages (from-to)3092-3094
Number of pages3
JournalJournal of the American Ceramic Society
Volume92
Issue number12
DOIs
Publication statusPublished - 2009 Dec 1

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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