Significantly enhanced energy-storage density in the strontium barium niobate-based/titanate-based glass-ceramics

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• 作者：Jinhua Liu ; Haitao Wang ; Bo Shen ; Jiwei Zhai ; Peng Li and Zhongbin Pan
• 刊名：Journal of the American Ceramic Society
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：100
• 期：2
• 页码：506-510
• 全文大小：953K
• ISSN：1551-2916

文摘

Two-step crystallization process was employed to improve microstructure and energy-storage density of the strontium barium niobate-based/titanate-based glass-ceramics. By using two-step crystallization process, the optimum nucleation temperature was obtained to improve dielectric breakdown strength. Compared to the breakdown strength by one-step crystallization process, the breakdown strength by two-step crystallization process is increased about 1.89 times with the optimum nucleation temperature. Energy-storage density of 7.73 ± 0.26 J/cm³ is significantly improved by two-step crystallization process and is about 2.9 times of 2.63 ± 0.17 J/cm³ by one-step crystallization process. This result is attributed to the homogeneous nucleation improving the microstructures of glass-ceramics. Identification and quantification of crystalline phases by using Rietveld refinement reveals the difference of dielectric constants for one-step and two-step crystallization processes.