Liquid phase sintering and microwave dielectric properties of Ba(Mg1/3Ta2/3)O3 ceramics

Cheng Liang Huang, Ruei Jsung Lin

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)

Abstract

The effect of CuO addition on the microstructures and the microwave dielectric properties of barium magnesium tantalate Ba(Mg1/3Ta2/3)O3 ceramics has been investigated. It is found that low level-doping of CuO (up to 1 wt%) can significantly improve the density of the specimens and their microwave dielectric properties. The density of doped Ba(Mg1/3Ta2/3)O3 ceramics can be increased beyond 96% of its theoretical density by at sintering 1440°C due to the liquid phase effect of CuO addition observed by scanning electron microscopy. The second phase was not observed for ceramics with 0.25 to 1 wt% CuO additions. The dielectric constant (εr) and temperature coefficient of resonant frequency (τf) were not significantly affected, while the nonloaded quality factors Q were effectively promoted by CuO addition. The εr value of 24.2, Q × f value of 173000 (at 10 GHz) and τf value of 1.5 ppm/°C were obtained for Ba(Mg1/3Ta2/3)O3 ceramics with 0.5 wt% CuO addition sintered at 1470°C for 4 h.

Original languageEnglish
Pages (from-to)712-716
Number of pages5
JournalJapanese Journal of Applied Physics
Volume41
Issue number2 A
DOIs
Publication statusPublished - 2002 Feb

All Science Journal Classification (ASJC) codes

  • General Engineering
  • General Physics and Astronomy

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