Dielectric properties and tunability of (Ba 1-xSr x)TiO 3:MgO composites

Shashnk Agrawal, R. Guo, Dinesh Kumar Agrawal, A. S. Bhalla

Research output: Contribution to journalConference article

Abstract

Composites of ferroelectric (Ba 1-xSr x)TiO 3 (BST) and non-ferroelectric MgO were prepared using nano particles to study the dielectric properties for microwave applications. By using precursor compounds of nano-sized particle, considerable reduction in dielectric losses was obtained, which enhances the figure of merit, K-factor, in the resulted composites. (Ba 1-xSr x)TiO 3:MgO composites with various volume ratios of the two components were sintered in a temperature range from 1400°C to 1600°C. Dielectric properties were studied in the temperature range of-250°C to 100°C, with and without bias electric fields. The low dielectric constants and tangent losses combined with high tunability and K-factor were achieved in the resulted composites. Tunable dielectric properties in relation to microstructure of BST:MgO composites are also discussed.

Original languageEnglish (US)
Pages (from-to)271-276
Number of pages6
JournalCeramic Transactions
Volume167
StatePublished - Aug 22 2005
Event106th Annual Meeting of the American Ceramic Society - Indianapolis, IN, United States
Duration: Apr 18 2004Apr 21 2004

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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    Agrawal, S., Guo, R., Agrawal, D. K., & Bhalla, A. S. (2005). Dielectric properties and tunability of (Ba 1-xSr x)TiO 3:MgO composites. Ceramic Transactions, 167, 271-276.