Phase Development and Dielectric Properties of Barium Strontium Titanate Based Glass Ceramics

Xiangrong Wang State Key Laboratory of New Ceramics and Fine Processing, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, P R China

Yong Zhang State Key Laboratory of New Ceramics and Fine Processing, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, P R China

Zongbao Yuan State Key Laboratory of New Ceramics and Fine Processing, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, P R China

Tao Ma State Key Laboratory of New Ceramics and Fine Processing, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, P R China

Changsheng Deng State Key Laboratory of New Ceramics and Fine Processing, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, P R China

Xiaming Dai State Key Laboratory of New Ceramics and Fine Processing, Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing, 100084, P R China

Abstract

The phase development, microstructural evolution, dielectric properties and energy storage characteristics were investigated as a function of crystallization temperature in barium strontium titanate-based glass ceramics. According to the XRD study, a majority phrase (Ba, Sr)TiO₃ and the minor phase BaAl₂Si₂O₈ were formed during the crystallization. Scanning electron microscopy investigations have revealed that with increasing crystallization temperature the volume faction of crystalline phases as well as their crystalline sizes increase. In addition, as the crystallization temperature increased, the dielectric constant of the glass ceramics increased and the dielectric breakdown strength decreased. The correlation between the dielectric properties and energy storage characteristics was qualitatively discussed.

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Acknowledgments

The authors are grateful to the Ministry of Sciences and Technology of China through 863-project under grant 2007AA03Z323, and National Natural Science Foundation of China (Grant No. 50977049) for financial support. Technical help by S. Q. Tong, C. L. Huang and D. H. Hao are recognized.

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Phase Development and Dielectric Properties of Barium Strontium Titanate Based Glass Ceramics

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