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J. Korean Ceram. Soc. > Epub ahead of print

doi: https://doi.org/10.4191/kcers.2019.56.1.02    [Epub ahead of print]
Linear and Nonlinear Dielectric Ceramics for High-Power Energy Storage Capacitor Applications
Mahesh Peddigari1, Haribabu Palneedi1, Geon-Tae Hwang1, Jungho Ryu2
1Functional Ceramics Group, Korea Institute of Materials Science, Changwon 51508, Korea
2School of Materials Science and Engineering, Yeungnam University, Gyeongsan 38541, Korea
Correspondence  Jungho Ryu ,Tel: +82-53-810-2474, Email: jhryu@ynu.ac.kr
Received: August 13, 2018;  Accepted: August 28, 2018.  Published online: December 19, 2018.
Dielectric materials with inherently high power densities and fast discharge rates are particularly suitable for pulsed power capacitors. The ongoing multifaceted efforts on developing these capacitors are focused on improving their energy density and storage efficiency, as well as ensuring their reliable operation over long periods, including under harsh environments. This review article summarizes the studies that have been conducted to date on the development of high-performance dielectric ceramics for employment in pulsed power capacitors. The energy storage characteristics of various lead-based and lead-free ceramics belonging to linear and nonlinear dielectrics are discussed. Various strategies such as mechanical confinement, self-confinement, coreshell structuring, glass incorporation, chemical modifications, and special sintering routes have been adopted to tailor the electrical properties and energy storage performances of dielectric ceramics. In addition, this review article highlights the challenges and opportunities associated with the development of pulsed power capacitors.
Key words: Dielectric ceramic, Capacitor, Energy storage density, Electric polarization, Breakdown strength
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