Title :
DC breakdown phenomena in BaTiO3-based multilayer ceramic capacitors
Author :
Zhou, Yuanxiang ; Cheng, Zixia ; Yan, Ping ; Liang, Xidong ; Guan, Zhicheng
Author_Institution :
Dept. of Electr. Eng. & Appl. Electron. Technol., Tsinghua Univ., Beijing, China
Abstract :
In this paper, DC breakdown in BaTiO3-based multilayer ceramic capacitors is studied. It was found that the current-voltage curves during the short-time DC breakdown test change after prestressing at room and Curie temperatures, while the current-voltage curves does not show any change at high temperature. After measuring the breakdown voltage before and after prestressing, it was confirmed that homo space charge is accumulated near the cathode at room and Curie temperature. This causes the increase and decrease of current with and without polarity reversal after prestressing, respectively. No space charge effect can be observed at high temperature is due to the considerable thermal effect on DC breakdown in multilayer ceramic capacitors
Keywords :
barium compounds; ceramic capacitors; electric breakdown; ferroelectric Curie temperature; ferroelectric capacitors; space charge; BaTiO3; BaTiO3 multilayer ceramic capacitor; Curie temperature; DC breakdown; current-voltage characteristics; homo space charge; polarity reversal; prestressing; room temperature; thermal effect; Capacitors; Ceramics; Charge measurement; Current measurement; Electric breakdown; Nonhomogeneous media; Space charge; Temperature; Testing; Voltage measurement;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 2001 Annual Report. Conference on
Conference_Location :
Kitchener, Ont.
Print_ISBN :
0-7803-7053-8
DOI :
10.1109/CEIDP.2001.963490
