BaTiO3-Bi(Mg2/3Nb1/3)O3 Ceramics for High-Temperature Capacitor Applications

Raz Muhammad, Yaseen Iqbal, Ian M. Reaney, Clive A. Randall

Research output: Contribution to journalArticle

27 Citations (Scopus)

Abstract

Solid solutions of (1-x)BaTiO3-xBi(Mg2/3Nb1/3)O3 (0 ≤ x ≤ 0.6) were prepared via a standard mixed-oxide solid-state sintering route and investigated for potential use in high-temperature capacitor applications. Samples with 0.4 ≤ x ≤ 0.6 showed a temperature independent plateau in permittivity (ϵr). Optimum properties were obtained for x = 0.5 which exhibited a broad and stable relative ϵr ~940 ± 15% from ~25°C to 550°C with a loss tangent <0.025 from 74°C to 455°C. The resistivity of samples increased with increasing Bi(Mg2/3Nb1/3)O3 concentration. The activation energies of the bulk were observed to increase from 1.18 to 2.25 eV with an increase in x from 0 to 0.6. These ceramics exhibited excellent temperature stable dielectric properties and are promising candidates for high-temperature multilayer ceramic capacitors for automotive applications.

Original languageEnglish (US)
Pages (from-to)2089-2095
Number of pages7
JournalJournal of the American Ceramic Society
Volume99
Issue number6
DOIs
StatePublished - Jun 1 2016

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ceramics
Capacitors
dielectric property
permittivity
solid solution
activation energy
electrical resistivity
temperature
oxide
plateau
Ceramic capacitors
Temperature
Dielectric properties
Oxides
Solid solutions
Multilayers
Permittivity
Sintering
Activation energy
solid state

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Geology
  • Geochemistry and Petrology
  • Materials Chemistry

Cite this

Muhammad, Raz ; Iqbal, Yaseen ; Reaney, Ian M. ; Randall, Clive A. / BaTiO3-Bi(Mg2/3Nb1/3)O3 Ceramics for High-Temperature Capacitor Applications. In: Journal of the American Ceramic Society. 2016 ; Vol. 99, No. 6. pp. 2089-2095.
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BaTiO3-Bi(Mg2/3Nb1/3)O3 Ceramics for High-Temperature Capacitor Applications. / Muhammad, Raz; Iqbal, Yaseen; Reaney, Ian M.; Randall, Clive A.

In: Journal of the American Ceramic Society, Vol. 99, No. 6, 01.06.2016, p. 2089-2095.

Research output: Contribution to journalArticle

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