Fabrication of High‐Curie‐Point Barium‐Lead Titanate PTCR Ceramics

Shiang‐Hua ‐H Wang*, Ford‐Son ‐S Hwang, Tseung-Yuen Tseng

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

High‐Curie‐point semiconducting barium‐lead titanate positive temperature coefficient of resistivity (PTCR) ceramics of composition Ba0.897Pb0.1La0.003TiO3 and Ba0.5Pb0.5La0.003TiO3 were prepared. The starting powders were synthesized by reacting commercial BaTiO3, PbO, and TiO2. To avoid the nonstoichiometry due to the volatilization of Pb during the sintering process, a lead atmosphere sintering approach with PbTiO3 as packing powder was used. The samples being fabricated by this method show a PTCR effect of 3 to 4.5 orders of magnitude above the Curie point. The curie points were about 180°C for Ba0.897Pb0.1La0.003TiO3 and about 360°C for Ba0.497Pb0.5La0.003TiO3.

Original languageEnglish
Pages (from-to)2767-2770
Number of pages4
JournalJournal of the American Ceramic Society
Volume73
Issue number9
DOIs
StatePublished - Sep 1990

Keywords

  • barium titanate
  • Curie temperature
  • electrical properties
  • lead titanate
  • sintering

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