High temperature and high energy density dielectric materials

Clive A. Randall, Hideki Ogihara, Jeong Ryeol Kim, Gai Ying Yang, Craig S. Stringer, Susan E. Trolier-McKinstry, Michael T. Lanagan

Research output: Chapter in Book/Report/Conference proceedingConference contribution

67 Scopus citations


This paper summarizes some of the recent work that has been conducted in search of new dielectric ceramic materials that can operate at temperatures between 180 to 350°C. High temperature perovskite relaxor materials were developed with compositions close to morphotropic phase boundaries (MPB) within xBi(Me'Me'')O3-yPb(Mg 1/3 Nb 2/3)O 3-zPbTiO3 ternary solid solutions. These materials show classical relaxor behavior with relative permivittivies ∼12,000, and T max∼270 to 300°C. Binary solid solutions with (1-x) BaTiO3-xBi(Me'Me'')O3, e.g: 0.35 BaTiO3-.0.65 BiScO3 have a much suppressed relaxor characteristic with relative permittivities ∼1000, and these materials have relatively weak voltage saturation, and therefore can maintain relatively stable energy densities ∼8 J/cm3 in multilayer form up to relatively high temperatures ∼200°C. Other opportunities for dielectrics is in non-ferroelectric dielectrics, here commercial COG dielectric capacitors with a relative permittivity ∼35, that are cofired with nickel multilayer electrodes and based on 0.95CaZrO3-0.05 SrTiO3 binary solutions are contrasted against commercial polymer capacitors. It is found in the COG capacitors the energy density ∼ 5 J/cm3 and high temperature performance∼200°C with capacitors approaching 1microFarad. With recoverable energy density as a key parameter, the dielectric breakdown strength is very important, recently we have considered the use of an alkali free glass when the thickness is of the order 20 microns and below. Here the energy densities have been observed as high as 35 J/cm3, the other attractive characteristics noted is preliminary evidence of graceful failure processes in these dielectric glasses.

Original languageEnglish (US)
Title of host publicationPPC2009 - 17th IEEE International Pulsed Power Conference
Number of pages6
StatePublished - 2009
Event17th IEEE International Pulsed Power Conference, PPC2009 - Washington, DC, United States
Duration: Jun 28 2009Jul 2 2009

Publication series

NamePPC2009 - 17th IEEE International Pulsed Power Conference


Other17th IEEE International Pulsed Power Conference, PPC2009
Country/TerritoryUnited States
CityWashington, DC

All Science Journal Classification (ASJC) codes

  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering


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