Microwave dielectric properties of

Yao Chung Chen, Cheng Liang Huang

Research output: Contribution to journalArticlepeer-review

19 Citations (Scopus)


Ba2-xSm4+2x/3Ti9O26 (x= 0-0.3) was selected as the formula for BaO-Sm2O3-4.5TiO2 ceramics based on the structure formula of the tungsten-bronze-type structure. The microstructure and microwave dielectric properties of Ba2-xSm4+2x/3Ti9O26 and the relationships between them were investigated in this study. The microstructure of Ba2-xSm4+2x/3Ti9O26 ceramics consists of a uniform matrix of primary BaO-Sm2O3-4TiO2 and BaO-Sm2O3-5TiO2 with small amounts of dispersed second phase, TiO2 and Ba2Ti9O20. Excellent dielectric properties of εr = 68-79, Q × f = 11 000-12 500 GHz and good temperature stability at the resonant frequency (τf = 0 ppm per °C) were obtained. The relationships between the microstructure, second phases and microwave dielectric properties were concerned. XRD patterns, energy dispersive X-ray spectrometer (EDS) analysis and scanning electron microscopy are also presented.

Original languageEnglish
Pages (from-to)250-256
Number of pages7
JournalMaterials Science & Engineering A: Structural Materials: Properties, Microstructure and Processing
Issue number1-2
Publication statusPublished - 2002 Sept 1

All Science Journal Classification (ASJC) codes

  • General Materials Science
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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