Catalytic combustion-type hydrogen sensor using BaTiO 3-based PTC thermistor

Masayoshi Yuasa, Takahito Nagano, Naoki Tachibana, Tetsuya Kida, Kengo Shimanoe

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

A catalytic combustion-type gas sensor using a positive temperature coefficient (PTC) thermistor, which shows a sharp resistance change around Curie temperature, was developed for the detection of hydrogen. La-doped BaTiO 3 (Ba0.998 La0.002 TiO3) was prepared through a solid-state method and an oxalic acid method. La-doped BaTiO3 obtained by the oxalic acid method showed improved PTC properties, due to the formation of fine particles, as compared to that prepared with the solid-state method. The resulting sensor device showed a fairly high H2 sensitivity in the range of 100-1000 ppm. In addition, the H 2 sensitivity and response speed were improved by coating a Pt/SiO2 catalyst on the sensor device because the catalytic combustion efficiency of H2 was improved by the catalyst coating.

Original languageEnglish
Pages (from-to)1789-1794
Number of pages6
JournalJournal of the American Ceramic Society
Volume96
Issue number6
DOIs
Publication statusPublished - Jun 2013

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

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