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CO2 sensors using BaCeO3-based ceramics

✍ Scribed by Takashi Hibino; Hiroyasu Iwahara

Book ID
103960890
Publisher
Elsevier Science
Year
1993
Tongue
English
Weight
260 KB
Volume
13
Category
Article
ISSN
0925-4005

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✦ Synopsis

The resistivuy of a Ba&,.ssY,,mOs_, ceramic element is very sensitive to CQ in a moist atmosphere. A reproducible linear relationship between the resistivity and the Co, concentration is observed in the range 200-3000 ppm.

In situ FT-IR spectra indicate that hydroxides are formed on the Ba(&,YO.MO+. surface in the moist atmosphere and react with CO, to form carbonates. From various electrochemical measurements, it is found that the carbonates formed do not increase the bulk resistivity of B~CQ.~~Y,,~O~-., but the resistivity of the interface between the electrolyte and tbe electrode.

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