Fabrication and properties of nonreducible lead-free piezoelectric Mn-doped (Ba,Ca)TiO3 ceramics

Wataru Sakamoto, Kouta Noritake, Hiroki Ichikawa, Koichiro Hayashi, Toshinobu Yogo

Research output: Contribution to journalArticle

3 Citations (Scopus)

Abstract

Nonreducible lead-free (Ba,Ca)TiO3 piezoceramics were fabricated by controlling the level of Mn doping. Similar to Mn-doped (Ba0.85Ca0.15)TiO3 ceramics sintered in air, stable dielectric properties with temperature change were achieved for the nonreducible sample by stabilizing the tetragonal phase of BaTiO3 over a wide temperature range. In addition, optimization of the level of Mn doping was very effective in improving the sintered density and electrical resistivity for (Ba0.85Ca0.15)TiO3 ceramics sintered under a low oxygen partial pressure. The valence state of doped Mn in nonreducible (Ba,Ca)TiO3 after sintering was confirmed to be Mn2+ or Mn3+ by electron spin resonance analysis. Sintered bodies of 1 mol% Ba excess and 1 mol% Mn-doped (Ba0.85Ca0.15)TiO3, which were sintered at 1350 °C in a H2(0.3%)/Ar atmosphere, exhibited sufficient sintered density and resistivity to allow the characterization of several electrical properties. The ferroelectric, field-induced strain, and piezoelectric properties of the nonreducible (Ba0.85Ca0.15)TiO3 ceramics sintered in the reducing atmosphere were comparable with those of (Ba0.85Ca0.15)TiO3 samples sintered in air.

Original languageEnglish
Pages (from-to)S166-S171
JournalCeramics International
Volume43
DOIs
Publication statusPublished - Aug 1 2017
Externally publishedYes

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Lead
Doping (additives)
Fabrication
Air
Partial pressure
Dielectric properties
Ferroelectric materials
Paramagnetic resonance
Electric properties
Sintering
Oxygen
Temperature

All Science Journal Classification (ASJC) codes

  • Electronic, Optical and Magnetic Materials
  • Ceramics and Composites
  • Process Chemistry and Technology
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this

Fabrication and properties of nonreducible lead-free piezoelectric Mn-doped (Ba,Ca)TiO3 ceramics. / Sakamoto, Wataru; Noritake, Kouta; Ichikawa, Hiroki; Hayashi, Koichiro; Yogo, Toshinobu.

In: Ceramics International, Vol. 43, 01.08.2017, p. S166-S171.

Research output: Contribution to journalArticle

Sakamoto, Wataru ; Noritake, Kouta ; Ichikawa, Hiroki ; Hayashi, Koichiro ; Yogo, Toshinobu. / Fabrication and properties of nonreducible lead-free piezoelectric Mn-doped (Ba,Ca)TiO3 ceramics. In: Ceramics International. 2017 ; Vol. 43. pp. S166-S171.
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