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Phase, microstructure and dielectric properties of BaSrZnSi 2 O 7 Ba 0.5 Sr 0.5 TiO 3 microwave tunable composite ceramics

MINGWEI ZHANG1,* , LE XIN2

Affiliation

  1. School of Materials Science and Engineering, Shandong University of Technology 12 Zhangzhou Road, Zibo 2 55049 Shandong People’s Republic of China
  2. Primary Education Education, Zibo Normal College College, 99 Tangjunouling Road Road, Zibo 2 55130 Shandong People’s Republic of China

Abstract

BaSrZnSi2O7-Ba0.5Sr0.5TiO3 composite ceramics were systematically characterized in terms of phase compo sition, microstructure and dielectric properties. It was found that dielectric permittivity peaks of the samples shifted to low temperatures initially and then kept invariable with increasing BaSrZnSi2O7 content. Tunability showed a similar trend to Curie temperature. The variation in Q value was mainly related to whether the ‘doping’ effect or ‘composite’ effect was dominated. The sample with 60 wt% BaSrZnSi2O7 possessed a high tunability of 16%(~10 kHz), a low dielectric permittivity of 152 and a high Q value of 417(~2.720 GHz), making it a promising candidate for applications as electrically tunable microwave devices..

Keywords

Composite ceramics, Tunability, Microwave dielectric properties, Cation ordering.

Citation

MINGWEI ZHANG, LE XIN, Phase, microstructure and dielectric properties of BaSrZnSi 2 O 7 Ba 0.5 Sr 0.5 TiO 3 microwave tunable composite ceramics, Optoelectronics and Advanced Materials - Rapid Communications, 9, 5-6, May-June 2015, pp.673-677 (2015).

Submitted at: June 26, 2014

Accepted at: May 7, 2015