Proceedings of the Korean Powder Metallurgy Institute Conference (한국분말야금학회:학술대회논문집)
- 2006.09a
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- Pages.358-359
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- 2006
Preparation of Ru-C Nano-composite Film by MOCVD and Electrode Properties for Oxygen Gas Sensor
- Kimura, Teiichi (Institute for Materials Research, Tohoku University) ;
- Goto, Takashi (Institute for Materials Research, Tohoku University)
- Published : 2006.09.24
Abstract
Ru-C nano-composite films were prepared by MOCVD, and their microstructures and their electrode properties for oxygen gas sensors were investigated. Deposited films contained Ru particles of 5-20 nm in diameter dispersed in amorphous C matrix. The AC conductivities associating to the interface charge transfer between Ru-C composite electrode and YSZ electrolyte were 100-1000 times higher than that of conventional paste-Pt electrodes. The emf values of the oxygen gas concentration cell constructed from the nano-composite electrodes and YSZ electrolyte showed the Nernstian theoretical values at low temperatures around 500 K. The response time of the concentration cell was 900 s at 500 K.
Keywords
- catalytic electrode;
- oxygen gas sensor;
- nano-composite;
- metal organic chemical vapor deposition;
- AC impedance spectroscopy