Journal of Electroceramics

, Volume 21, Issue 1–4, pp 17–21 | Cite as

Mechanism of capacitance aging under DC-bias field in X7R-MLCCs

  • Takaaki Tsurumi
  • Motohiro Shono
  • Hirofumi Kakemoto
  • Satoshi Wada
  • Kenji Saito
  • Hirokazu Chazono
Article

Abstract

Capacitance aging under DC electric fields has been studied on multilayer ceramic capacitors (MLCCs) with the X7R characteristics. The capacitance change with time was divided into two stages, the first- and the second-stage. The first-stage was due to the nonlinear permittivity of dielectrics and it should not be involved in the aging phenomenon. The second-stage depended on the MnO content, grain size and firing condition of dielectrics. From the behavior of the second-stage, it was concluded that the capacitance aging was caused by the 90-degree domain switching in BaTiO3 in the core. The first-stage was due to the nonlinear permittivity but the domain switching was also included in the first-stage if the domain walls moved by the first application of DC field. The change in the aging behavior with the intensity of DC field could be explained by separating capacitance change into the nonlinear permittivity and the domain switching according to the mechanism proposed in this study.

Keywords

Multilayer ceramic capacitor Ferroelectric domain Barium titanate Nonlinear dielectricity X7R 

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Copyright information

© Springer Science+Business Media, LLC 2007

Authors and Affiliations

  • Takaaki Tsurumi
    • 1
  • Motohiro Shono
    • 1
  • Hirofumi Kakemoto
    • 1
  • Satoshi Wada
    • 1
  • Kenji Saito
    • 2
  • Hirokazu Chazono
    • 2
  1. 1.Graduated School of Science and EngineeringTokyo Institute of TechnologyTokyoJapan
  2. 2.Central R&D LaboratoryTaiyo Yuden Co., HarunaGunmaJapan

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