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Effect of microwave processes on the energy-storage properties of barium strontium titanate glass ceramics

Published online by Cambridge University Press:  15 January 2014

Jinwen Wang ,
Linjiang Tang ,
Bo Shen  and
Jiwei Zhai
Jinwen Wang
Affiliation:
Functional Materials Research Laboratory, Tongji University, Shanghai 200092, China
Linjiang Tang
Affiliation:
Functional Materials Research Laboratory, Tongji University, Shanghai 200092, China
Bo Shen*
Affiliation:
Functional Materials Research Laboratory, Tongji University, Shanghai 200092, China
Jiwei Zhai
Affiliation:
Functional Materials Research Laboratory, Tongji University, Shanghai 200092, China
*
a)Address all correspondence to this author. e-mail: [email protected]
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Abstract

Barium strontium titanate (BST) glass-ceramics were fabricated via controlled crystallization with different crystallization routes. Effects of the microwave crystallization and microwave treatment on the microstructure and energy storage properties of the glass-ceramics were systematically investigated. Results showed that microwave crystallization can increase the dielectric constant. In addition, it was found that the microwave process had little impact on the crystallinity (about 90 wt%), but preferred the crystallization of SrAl4O7. Most importantly, the dielectric breakdown strength (BDS) of the glass ceramics was significantly improved from 561.3 to 791.4 kV/cm by the microwave crystallization. And it can be further enhanced to 900.0 kV/cm by conventional crystallization combined with microwave treatment. The corresponding energy densities of samples derived from the microwave processes were increased to 1.05 and 1.13 J/cm3, respectively, compared with the sample fabricated by the conventional crystallization route (0.47 J/cm3).

Keywords

barium strontium titanateglass ceramicsbreakdown strengthenergy density
Type
Articles
Information
Journal of Materials Research , Volume 29 , Issue 2 , 28 January 2014 , pp. 288 - 293
Copyright
Copyright © Materials Research Society 2013 

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