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Journal of Materials Science

, Volume 32, Issue 6, pp 1449–1453 | Cite as

Calcium-doping effect on temperature coefficients of dielectric constants in SrTiO3 capacitors

  • S SHIBAGAKI
  • A KOGA
  • J TANAKA
Article

Abstract

SrTiO3 ceramic capacitors were studied to improve the temperature coefficient, τ, of dielectric constants without decreasing the dielectric constants. It was indicated that an addition of calcium in an insulating reagent improved τ. From scanning electron microscopy and energy-dispersive X-ray analysis measurements, the origin of this improvement was ascribed to the following layers: (1) the oxide layers which were formed at the grain boundaries, and (2) the bismuth-oxide layers which were formed on the sample surface.

Keywords

Dielectric Constant Calcium Content Sintered Sample Bismuth Oxide Sintered Body 

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Copyright information

© Chapman and Hall 1997

Authors and Affiliations

  • S SHIBAGAKI
    • 1
  • A KOGA
  • J TANAKA
    • 2
  1. 1.Advanced Technology Research LaboratorySumitomo Metal Industries LtdAmagasaki HyogoJapan
  2. 2.National Institute for Research in Inorganic MaterialsTsukuba IbarakiJapan

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