Catalytic Combustion‐Type Hydrogen Sensor Using BaTiO3‐based PTC Thermistor. Issue 6 (12th February 2013)

• Record Type: Journal Article
• Authors: Yuasa, Masayoshi; Nagano, Takahito; Tachibana, Naoki; Kida, Tetsuya; Shimanoe, Kengo; Damjanovic, D.
• Is Part Of: Journal of the American Ceramic Society. Volume 96:Issue 6(2013)
• Page Start: 1789
• Page End: 1794
• Publication Date: 2013-02-12
• Subjects: Ceramics -- Periodicals; 620.1405
• DOI: 10.1111/jace.12217
• Languages: English
• ISSNs: 0002-7820

Abstract

<abstract abstract-type="main" id="jace12217-abs-0001"> <title> <x xml:space="preserve">Abstract</x> </title> <p>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 BaTiO₃ (Ba_0.998 La_0.002 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 H₂ 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.</p> </abstract>