Low temperature sintering of BaO-Sm2O3-4TiO2 ceramics

Kyung Hoon Cho, Jong Bong Lim, Sahn Nahm, Hyo Tae Kim, Jong Hee Kim, Jong Hoo Paik, Hwack Joo Lee

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9 Citations (Scopus)

Abstract

The effect of B2O3 and CuO on the sintering temperature and microwave dielectric properties of BaSm2Ti4O12 ceramics was investigated. The BaSm2Ti4O12 ceramics were able to be sintered at 1000 °C when B2O3 was added. This decrease in the sintering temperature of the BaSm2Ti4O12 ceramics upon the addition of B2O3 is attributed to the BaB4O7 second phase, whose melting temperature is around 900 °C. The B2O3 added BaSm2Ti4O12 ceramics alone were not able to be sintered below 1000 °C, but were sintered at 875 °C when CuO was added. BaCu(B2O5) second phase might be responsible for the decrease in the sintering temperature of the CuO and B2O3 added BaSm2Ti4O12 ceramics. The BaSm2Ti4O12 + 10.0 mol% B2O3 + 20.0 mol% CuO ceramics sintered at 875 °C for 2 h have good microwave dielectric properties of εr = 61.47, Q × f = 4256 GHz and τf = -9.25 ppm/°C. The BaCu(B2O5) is also a good additive for decreasing the sintering temperature of the BaSm2Ti4O12 ceramics.

Original languageEnglish
Pages (from-to)1053-1058
Number of pages6
JournalJournal of the European Ceramic Society
Volume27
Issue number2-3
DOIs
Publication statusPublished - 2007

Keywords

  • Dielectric properties
  • Microstructure
  • Sintering

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry

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    Cho, K. H., Lim, J. B., Nahm, S., Kim, H. T., Kim, J. H., Paik, J. H., & Lee, H. J. (2007). Low temperature sintering of BaO-Sm2O3-4TiO2 ceramics. Journal of the European Ceramic Society, 27(2-3), 1053-1058. https://doi.org/10.1016/j.jeurceramsoc.2006.05.061