期刊
APPLIED PHYSICS LETTERS
卷 99, 期 20, 页码 -出版社
AMER INST PHYSICS
DOI: 10.1063/1.3663566
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资金
- National Natural Science Foundation (NSFC) of China [U0937603]
- NSFC project of China [50902141]
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. (C) 2011 American Institute of Physics. [doi: 10.1063/1.3663566]
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