1. High breakdown strength and enhanced energy storage performance of niobate-based glass-ceramics via glass phase structure optimization.
- Author
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Liu, Changshuai, Xie, Shufeng, Chen, Kaikai, Song, Baijie, Shen, Bo, and Zhai, Jiwei
- Subjects
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GLASS-ceramics , *GLASS structure , *ENERGY storage , *PULSED power systems , *POWER density , *ELECTRONIC systems , *ENERGY density - Abstract
The dielectric capacitors with excellent energy storage characteristics, high power density and temperature stability are strongly desired in modern pulse power system and electronic industry. Thus, BKNAS- x PbO glass-ceramics were designed and prepared. Free oxygen in the glass phase which weakens the glass network structure can be adsorbed by trace Pb2+, thus improving the breakdown strength (BDS) of BKNAS glass-ceramics. Extremely high BDS (~2089 kV/cm) and excellent energy storage density (~17.62 J/cm3) were achieved in 0.6 mol% PbO doped BKNAS glass-ceramics. Moreover, the permittivity variance of BKNAS-0.6PbO glass-ceramics was less than 4.39% in the ultrawide temperature range (−80–300 °C), suggesting excellent temperature stability. The single layer capacitor made by BKNAS-0.6PbO glass-ceramics also exhibited excellent charge-discharge performance, in which the underdamped discharge power density reached 133.69 MW/cm3 as well as the overdamped discharge power density reached 146.89 MW/cm3 with ultrashort discharge time (<18 ns). The above results show that BKNAS-0.6PbO glass-ceramics possesses great potentiality for pulse capacitors owning to excellent energy storage property, temperature stability and charge-discharge performance. [ABSTRACT FROM AUTHOR]
- Published
- 2021
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