Significantly enhanced energy‐storage density in the strontium barium niobate‐based/titanate‐based glass‐ceramics |
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| Authors: | Jinhua Liu Haitao Wang Bo Shen Jiwei Zhai Peng Li Zhongbin Pan |
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| Affiliation: | 1. Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Functional Materials Research Laboratory, School of Materials Science & Engineering Tongji University, Shanghai, China;2. School of Physics and Electronic Science, Guizhou Normal University, Guiyang, China |
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| Abstract: | 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. |
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| Keywords: | energy‐storage density glass‐ceramics strontium barium niobate/titanate two‐step crystallization method |
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