The effect of Hf doping on the dielectric and energy storage performance of barium titanate based glass ceramics

A series of (1-x) (BaO–TiO2–SiO2–Al2O3–B2O3)-xHfO2 (abbreviated as (1-x)BTSAB-xH) glass-ceramics were designed and prepared by traditional melt quenching and heat treatment method. The dielectric and energy storage properties of the glass-ceramics were studied systematically. The results of X-ray di...

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Bibliographic Details
Published in:Ceramics international 2021-04, Vol.47 (8), p.11581-11586
Main Authors: Wei, Juwen, Jiang, Denghui, Yu, Wenjie, Shang, Fei, Chen, Guohua
Format: Article
Language:English
Subjects:
Dielectric constant
Energy storage properties
Glass-ceramics
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Summary:A series of (1-x) (BaO–TiO2–SiO2–Al2O3–B2O3)-xHfO2 (abbreviated as (1-x)BTSAB-xH) glass-ceramics were designed and prepared by traditional melt quenching and heat treatment method. The dielectric and energy storage properties of the glass-ceramics were studied systematically. The results of X-ray diffraction indicate that the main crystal phase of (1-x) BTSAB-xH glass-ceramics is BaTiO3. It should be noted that the addition of HfO2 can not only increase the dielectric constant, but also enhance the breakdown dielectric strength, resulting in high theoretical energy storage density. The max theoretical energy storage density can reach up to 7.07 J/cm3. The discharged energy storage density is 0.73 J/cm3 measured at 300 kV/cm @ room temperature. These results show that Hf doped barium titanate-based glass-ceramics are promising materials for application in dielectric capacitor with high energy storage density.
ISSN:0272-8842
1873-3956
DOI:10.1016/j.ceramint.2020.12.290