Computer simulation of direct-current field dependence of the dielectric constant of Al2O3-doped barium stronium titanate in the paraelectric state

Yih Chien Chen, Long Wu, Cheng Liang Huang, Yi Ping Chou, Yuan Tu Tsai

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6 Citations (Scopus)

Abstract

Effects of a DC field on the real part of the relative dielectric constant of Al2O3-doped barium strontium titanate for application in phased array antennas have been studied. The real part of the relative dielectric constant of the specimens decreases when the applied DC field is increased. The tunability is about 24% for barium strontium titanate doped with 1 wt% Al2O3. Curve fitting only works well for pure barium strontium titanate. The real part of the relative dielectric constant of Al2O3-doped barium strontium titanate decreases rapidly before 1.0kV/cm and slowly after 1.0kV/cm when compared to the data obtained by curve fitting. This can be explained by the space charge polarization theory.

Original languageEnglish
Pages (from-to)2690-2695
Number of pages6
JournalJapanese Journal of Applied Physics
Volume39
Issue number5 A
DOIs
Publication statusPublished - 2000 May 1

All Science Journal Classification (ASJC) codes

  • Engineering(all)
  • Physics and Astronomy(all)

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