Sensing properties of an oxygen sensor using BaCe{sub 0.8}Gd{sub 0.2}O{sub 3{minus}{alpha}} ceramics as electrolytes
- Matsushita Electric Industry Co., Ltd., Moriguchi, Osaka (Japan)
Limiting-current-type oxygen sensors using BaCe{sub 0.8}Gd{sub 0.2}O{sub 3{minus}{alpha}} (BCG) ceramics as electrolytes were constructed on a trial basis and their sensing properties investigated in order to develop a new oxygen sensor to replace the zirconia type. BCG ceramics exhibited high conductivity in the temperature range 200--1,000 C, and it was verified that the oxide ion could be a conductive carrier in BCG in oxygen at low temperatures (300 C). The oxygen sensors using BCGs worked at 300 C, and their output currents linearly increased with an increase in oxygen concentration in the range 1--22%. They could respond within 30 s between 1 and 21%, and humidity only slightly affected sensing performance. BCG seems to be a promising electrolyte material for an oxygen sensor operating at low temperatures (300 C).
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 653265
- Journal Information:
- Journal of the Electrochemical Society, Vol. 145, Issue 5; Other Information: PBD: May 1998
- Country of Publication:
- United States
- Language:
- English
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