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Microstructure and dielectric tunable properties of Ba0.6Sr0.4TiO3-Mg2SiO4-MgO composite

Authors :
Yanyan He
Chunlian Zeng
Ting Liu
Yebin Xu
Wanping Chen
Source :
IEEE transactions on ultrasonics, ferroelectrics, and frequency control. 57(7)
Publication Year :
2010

Abstract

Ba(0.6)Sr(0.4)TiO(3)-Mg(2)SiO(4)-MgO composite ceramics were prepared by a solid-state reaction method and their dielectric tunable characteristics were investigated for the potential application as microwave tunable materials. The addition of Mg(2)SiO(4)-MgO into Ba(0.6)Sr(0.4)TiO(3) forms ferroelectric (Ba(0.6)Sr(0.4)TiO(3))-dielectric (Mg(2)SiO(4)-MgO) composites and shifts the Curie temperature to a lower temperature. The dielectric constant and loss tangent of Ba(0.6)Sr(0.4)TiO(3)-Mg(2)Si(O4)- MgO composites have been decreased and the overall tunability is maintained at a sufficiently high level. The microwave dielectric properties of Ba(0.6)Sr(0.4)TiO(3)-Mg(2)Si(O4)-MgO composites were evaluated. Ba(0.6)Sr(0.4)TiO(3)-Mg(2)SiO(4)-MgO composites have tunability of 9.2 to 10.5% at 100 kHz under 2 kV/mm, indicating that it is a promising candidate material for tunable microwave applications requiring a low dielectric constant.

Details

ISSN :
15258955
Volume :
57
Issue :
7
Database :
OpenAIRE
Journal :
IEEE transactions on ultrasonics, ferroelectrics, and frequency control
Accession number :
edsair.doi.dedup.....16caa2e465eb9fb67e57f8c06e5a8f0f