Fabrication of lead-free semiconducting ceramics using a BaTiO3-(Bi1/2Na1/2)TiO3 system by adding CaO

• TATEISHI Takashi

  Graduate School of Science and Technology, Tokyo Institute of Technology

• HOSHINA Takuya

  Graduate School of Science and Technology, Tokyo Institute of Technology

• TAKEDA Hiroaki

  Graduate School of Science and Technology, Tokyo Institute of Technology

• TSURUMI Takaaki

  Graduate School of Science and Technology, Tokyo Institute of Technology

Abstract

BaTiO₃–(Bi_1/2Na_1/2)TiO₃ (abbreviated as BT–BNT) solid solution semiconducting ceramics, as a candidate for a lead-free PTC (Positive Temperature Coefficient of resistivity) thermistor usable over 130°C, were synthesized by adding CaO into the calcined powder. The CaO added BT–BNT ceramics showed semiconducting behavior with the resistivity at room temperature ρ_RT = 10³ Ω cm and a resistivity change near Curie temperature. Chemical composition analysis suggested that Ca²⁺ acted as a donor by substituting for Na⁺ in the BT–BNT ceramics.

Journal

• Journal of the Ceramic Society of Japan

  Journal of the Ceramic Society of Japan 119 (1395), 828-831, 2011

  The Ceramic Society of Japan

Keywords

• Semiconducting ceramics
• Barium titanate
• Bismuth sodium titanate
• Lead-free

Details

• CRID: 1390282680263934848
• NII Article ID: 130001310509
• NII Book ID: AA12229489
• DOI: 10.2109/jcersj2.119.828
• COI: 1:CAS:528:DC%2BC3MXhsVOrsr%2FM
• ISSN: 13486535
• ISSN: 18820743
• NDL BIB ID: 11291082
• Web Site: https://ndlsearch.ndl.go.jp/books/R000000004-I11291082
• Web Site: http://www.jstage.jst.go.jp/article/jcersj2/119/1395/119_1395_828/_pdf
• Text Lang: en
• Data Source:
  • JaLC
  • NDL
  • Crossref
  • CiNii Articles
  • KAKEN
• Abstract License Flag: Disallowed