期刊
CERAMICS INTERNATIONAL
卷 47, 期 22, 页码 31229-31237出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2021.07.299
关键词
Glass-ceramics; Glass network structure; Breakdown strength; Power density
资金
- Ministry of Science and Technology of China through Project 973 [2015CB654601]
BKNAS-0.6PbO glass-ceramics exhibit high breakdown strength and energy storage density, with excellent temperature stability in an ultra-wide temperature range.
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-xPbO 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 (similar to 2089 kV/cm) and excellent energy storage density (similar to 17.62 J/cm(3)) 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 degrees 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/cm(3) as well as the overdamped discharge power density reached 146.89 MW/cm(3) 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.
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