材料科学
放电等离子烧结
介电常数
电介质
复合材料
微观结构
陶瓷
复合数
烧结
介电常数
等离子体
铁电性
铁电陶瓷
光电子学
量子力学
物理
作者
Wanfang Liao,Ruihong Liang,Genshui Wang,Fei Cao,Xianlin Dong
摘要
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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