Investigation on some ceramic materials for electrochemical device applications
The recent developments in the field of high temperature technology demand materials with tailor-made electrical properties. These conductors play an important role in many practical applications. Energy conversion devices like fuel cells require solid electrolyte materials with ionic conductivity and electrodes with electronic conductivity. Mixed conductors are useful for high- temperature electrolysis of water vapor resulting in substantial energy savings in comparison with conventional electrolysis techniques. Because of their stability and reasonably high conductivity the cubic fluorite oxides of zirconia-ceria and chromite-based perovskites have received considerable attention for such applications. Ceramics based on tetragonal zirconia polycrystal (TZP) are being projected as potential fuel cell electrolyte materials. Microwave processing of these materials is a promising approach for the future development of ceramic devices for various electrochemical applications. As a part of the program designed to develop suitable materials for some of these applications, this paper will cover the method of preparation and electrical conductivity study performed on (ZrO2)0.85(CeO2)0.12(Y2O3)0.03 and doped chromites A1-xSrxCrO3 (A = La, Y). We have also successfully sintered the Y-TZP ceramics to density close to the theoretical by using microwave energy and a single mode applicator. Some of the results will be presented in this paper. © 1992.
Solid State Ionics
Investigation on some ceramic materials for electrochemical device applications.
Solid State Ionics,
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