14. Ionic Distribution and Microwave Dielectric Properties for Tungstenbronze-Type Like Ba6-3xR8+2xTi18O54 (R = Sm, Nd and La) Solid Solutions

  1. Sheng Yao,
  2. Bruce Tuttle,
  3. Clive Randall and
  4. Dwight Viehland
  1. H. Ohsato,
  2. M. Suzuki and
  3. K. Kakimoto

Published Online: 26 MAR 2008

DOI: 10.1002/9780470291252.ch14

Advances in Electronic Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 26, Number 5

Advances in Electronic Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 26, Number 5

How to Cite

Ohsato, H., Suzuki, M. and Kakimoto, K. (2005) Ionic Distribution and Microwave Dielectric Properties for Tungstenbronze-Type Like Ba6-3xR8+2xTi18O54 (R = Sm, Nd and La) Solid Solutions, in Advances in Electronic Ceramic Materials: Ceramic Engineering and Science Proceedings, Volume 26, Number 5 (eds S. Yao, B. Tuttle, C. Randall and D. Viehland), John Wiley & Sons, Inc., Hoboken, NJ, USA. doi: 10.1002/9780470291252.ch14

Author Information

  1. Materials Science and Engineering, Nagoya Institute of Technology, Gokiso-cho, Showa-ku, Nagoya 466-8555, Japan

Publication History

  1. Published Online: 26 MAR 2008
  2. Published Print: 1 JAN 2005

ISBN Information

Print ISBN: 9781574982350

Online ISBN: 9780470291252

SEARCH

Keywords:

  • solutions;
  • dielectric properties;
  • compositional;
  • crystal;
  • distribution

Summary

Ba6-3xR8+2xTi18O54 (R = Sm, Nd and La) solid solutions have been applied to microwave resonators and filters for mobile phone because of their high dielectric constant ϵr, high quality factor Q·f and near zero temperature coefficient of resonant frequency τf. In this paper, relationships between cation distribution and microwave dielectric properties in this compound are presented in four following cases: case 1 is the improvement of quality factor by compositional ordering; case 2 does more compositional ordering result in higher quality factors; case 3 the quality factor dependence on R-cations; and case 4 the correlation of trigonal site occupation with microwave dielectric properties.