Synthesis of BaCu(B2O5) ceramics and their effect on the sintering temperature and microwave dielectric properties of Ba(Zn 1/3Nb2/3)O3 ceramics

Min Han Kim, Jong Bong Lim, Jae Chul Kim, Sahn Nahm, Jong Hoo Paik, Jong Hee Kim, Kyeong Soon Park

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BaCu(B2O5) ceramics were synthesized and their microwave dielectric properties were investigated. BaCu(B2O 5) phase was formed at 700°C and melted above 850°C. The BaCu(B2O5) ceramic sintered at 810°C had a dielectric constant (εr) of 7.4, a quality factor (Q × f) of 50000 GHz and a temperature coefficient of resonance frequency (τf) of -32 ppm/°C. As the BaCu(B2O5) ceramic had a low melting temperature and good microwave dielectric properties, it can be used as a low-temperature sintering aid for microwave dielectric materials for low temperature co-fired ceramic application. When BaCu(B2O5) was added to the Ba(Zn1/3Nb2/3)O3 (BZN) ceramic, BZN ceramics were well sintered even at 850°C. BaCu(B 2O5) existed as a liquid phase during the sintering and assisted the densiflcation of the BZN ceramic. Good microwave dielectric properties of Q × f = 16000 GHz, εr = 35, and τ f = 22.1 ppm/°C were obtained for the BZN+6.0 mol% BaCu(B 2O5) ceramic sintered at 875°C for 2 h.

Original languageEnglish
Pages (from-to)3124-3128
Number of pages5
JournalJournal of the American Ceramic Society
Issue number10
Publication statusPublished - 2006 Oct 1


ASJC Scopus subject areas

  • Ceramics and Composites

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