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

Dielectric and tunable properties of columnar Ba0.6Sr0.4TiO3-MgO composites prepared by spark plasma sintering
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放电等离子烧结柱状Ba0.6Sr0.4TiO3-MgO复合材料的介电性能和可调性能

DOI:
10.1063/1.3663566
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发表时间:
2011-11
影响因子:
4
通讯作者:
Dong, Xianlin
Dong, Xianlin
中科院分区:
物理与天体物理2区
文献类型:
--
作者:
Liao, Wanfang;Liang, Ruihong;Wang, Genshui;Cao, Fei;Dong, Xianlin

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采用放电等离子烧结(SPS)方法制备了具有柱状、层状和球形夹杂物3种结构的Ba0.6Sr0.4TiO3(BST)/MgO复合铁电材料。研究了其微观结构和介电性能。结果表明,柱状复合材料表现出可观的可调谐性(44.3%)的纯BST的高,而介电常数已从5872降低到3998在10 kHz在室温下,导致介电常数的降低,而不恶化的可调谐性的块体陶瓷。这是一种可行的方法来平衡介电常数和可调谐性,这是非常有前途的可调谐器件的应用。
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.
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