Influence of V2O5 additions to Ba(Mg 1/3Ta2/3)O3 ceramics on sintering behavior and microwave dielectric properties

Cheng Liang Huang, Kuo Hau Chiang, She Cher Chuang

Research output: Contribution to journalArticle

18 Citations (Scopus)

Abstract

The microstructures and the microwave dielectric properties of barium magnesium tantalate ceramics prepared by conventional mixed oxide route have been investigated. The prepared Ba(Mg1/3Ta2/3)O 3 exhibited a mixture of cubic perovskite and a hexagonal superstructure with Mg and Ta showing 1:2 order in the B-site. It is found that low level doping of V2O5 (up to 0.5wt.%) can significantly improve densification of the specimens and their microwave dielectric properties. The density of doped Ba(Mg1/3Ta 2/3)O3 ceramics can be increased beyond 95% of its theoretical value by 1500°C-sintering, which is caused by the liquid-phase effect of V2O5 addition. The detected second phase Ta 2O5 was mainly the result of V5+ substitution in the ceramics. Dielectric constant (εr) and temperature coefficient of resonant frequency (τf) were not significantly affected, while the unloaded quality factors Q were effectively promoted by V2O5 addition due to the increase in B-site ordering. The εr value of 24.1, Q × f value of 149,000 (at 10GHz) and τf value of 7.2ppm/°C were obtained for Ba(Mg 1/3Ta2/3)O3 ceramics with 0.25wt.% V 2O5 addition sintered at 1500°C for 3h.

Original languageEnglish
Pages (from-to)629-636
Number of pages8
JournalMaterials Research Bulletin
Volume39
Issue number4-5
DOIs
Publication statusPublished - 2004 Apr 2

All Science Journal Classification (ASJC) codes

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

Fingerprint Dive into the research topics of 'Influence of V<sub>2</sub>O<sub>5</sub> additions to Ba(Mg <sub>1/3</sub>Ta<sub>2/3</sub>)O<sub>3</sub> ceramics on sintering behavior and microwave dielectric properties'. Together they form a unique fingerprint.

  • Cite this