Improved Breakdown Strength in (Ba0.6Sr0.4)0.85Bi0.1TiO3 Ceramics with Addition of CaZrO3 for Energy Storage Application |
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| Authors: | Xiaohong Wang Zhenlin Li Fangyuan Chen Junxiong Gao Wenzhong Lü |
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| Affiliation: | 1.School of Optical and Electronic Information,Huazhong University of Science and Technology,Wuhan,China;2.Key Lab of Functional Materials for Electronic Information(B), MOE,Huazhong University of Science and Technology,Wuhan,China |
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| Abstract: | (Ba0.6Sr0.4)0.85Bi0.1TiO3 ceramics doped with x wt%CaZrO3 (x= 0-10) were synthesized by solid-state reaction method. The effects of CaZrO3 amount on the dielectric properties and structure of (Ba0.6Sr0.4)0.85Bi0.1TiO3 ceramics were investigated. X-ray diffraction results indicated a pure cubic perovskite structure for all samples and that the lattice parameter increased till x=5 and then slightly decreased. A homogenous microstructure was observed with the addition of CaZrO3. Dielectric measurements revealed a relaxor-like characteristic for all samples and that the diffusivity γ reached the maximum value of 1.78 at x=5. With the addition of CaZrO3, the dielectric constant dependence on electric field was weakened, insulation resistivity enhanced and dielectric breakdown strength improved obviously and reached 19.9 kV/mm at x=7.5. In virtue of low dielectric loss (tan δ<0.001 5), moderate dielectric constant (εr >1 500) and high breakdown strength (Eb >17.5 kV/mm), the CaZrO3 doped (Ba0.6Sr0.4)0.85Bi0.1TiO3 ceramic is a potential candidate material for high power electric applications. |
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