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Dielectric and tunable properties of columnar Ba0.6Sr0.4TiO3-MgO composites prepared by spark plasma sintering.

Authors :
Liao, Wanfang
Liang, Ruihong
Wang, Genshui
Cao, Fei
Dong, Xianlin
Source :
Applied Physics Letters; 11/14/2011, Vol. 99 Issue 20, p202905, 3p, 1 Black and White Photograph, 1 Chart, 2 Graphs
Publication Year :
2011

Abstract

The ferroelectric Ba0.6Sr0.4TiO3 (BST) and dielectric MgO composites with three different structures: columnar, layered, and spherical inclusion were prepared by spark plasma sintering (SPS). The microstructure and dielectric properties were investigated. Results show that the columnar composite exhibits an appreciable tunability (44.3%) as high as that of pure BST while the permittivity has been reduced from 5872 to 3998 at 10 kHz at room temperature, leading to a reduction of permittivity without deterioration of tunability in the bulk ceramics. This is a feasible way to balance the permittivity and the tunability, which is very promising for tunable devices application. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
00036951
Volume :
99
Issue :
20
Database :
Complementary Index
Journal :
Applied Physics Letters
Publication Type :
Academic Journal
Accession number :
67327880
Full Text :
https://doi.org/10.1063/1.3663566