High temperature properties of manganese modified CaBi4Ti4O15 ferroelectric ceramics

Shujun Zhang, Namchul Kim, Thomas R. Shrout, Masahiko Kimura, Akira Ando

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Abstract

The dielectric, piezoelectric and electromechanical properties of manganese modified CaBi4Ti4O15 (CBT) bismuth layer-structured ferroelectric ceramics were determined in the range of room temperature to ∼800 {ring operator}C. The room temperature dielectric permittivity and dielectric loss were found to be 148 and 0.2%, respectively. The piezoelectric coefficients, d33 and d15, were 14  pC/N and 9  pC/N, with electromechanical coupling factors k33 = 8.4 % and k15 = 5.5 %. The mechanical quality factor Q (sliver extensional mode) was 4300 at room temperature, decreasing with increasing temperature. The remnant polarization and coercive field were found to be 5.2 μC/cm2 and 88 kV/cm, respectively. The excellent piezoelectric, mechanical properties, together with its high Curie temperature (∼800 {ring operator}C) and high electrical resistivity (1 × 107 Ω cm at 500 {ring operator}C), demonstrated the potential of manganese modified CBT ceramics for ultra-high temperature sensing applications.

Original languageEnglish (US)
Pages (from-to)154-158
Number of pages5
JournalSolid State Communications
Volume140
Issue number3-4
DOIs
StatePublished - Oct 1 2006

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All Science Journal Classification (ASJC) codes

  • Chemistry(all)
  • Condensed Matter Physics
  • Materials Chemistry

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