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A practical capacitive type CO 2 sensor composed of CeO 2 /BaCO 3 /CuO mixed oxides has been developed for the IAQ (indoor air quality) monitoring system. Sensing detectors were fabricated as follows. The pressed pellets of CeO 2 /BaCO 3 /CuO mixed oxides were sintered at 800-900 o C for 5 h, then RuO 2 electrode was formed on both sides of the...
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