Read e-book online Advances in Solid Oxide Fuel Cells II, Ceramic Engineering PDF

By Andrew Wereszczak, Edgar Lara-Curzio, Narottam P. Bansal

Because of its many capability advantages, together with excessive electric potency and occasional environmental emissions, strong oxide gasoline telephone (SOFC) know-how is the topic of in depth study and improvement efforts by way of nationwide laboratories, universities, and personal industries. In those lawsuits, foreign scientists and engineers current contemporary technical development on materials-related points of gas cells together with SOFC part fabrics, fabrics processing, and cell/stack layout, functionality, and balance. rising traits in electrochemical fabrics, electrodics, interface engineering, long term chemical interactions, and extra are included.This ebook is compiled of papers provided on the court cases of the thirtieth foreign convention on complicated Ceramics and Composites, January 22-27, 2006, Cocoa seashore, Florida. geared up and subsidized through the yank Ceramic Society and the yankee Ceramic Society's Engineering Ceramics department together with the Nuclear and Environmental know-how department.

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Extra info for Advances in Solid Oxide Fuel Cells II, Ceramic Engineering and Science Proceedings, Cocoa Beach

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A) 20 pm mash giving a final thickness of 9 Fm b) 100 pm mash giving a final thichness of 21 pm and c) 100 km mask with tHo w e e n printed layers on top o f each other giring a final thichness of 60 pm. In Figure 4 the OCV o f a cell with a very thin anode (9 pm) is plotted as a function of time for three different CK-air flow. 76V with a period between 20 and 50 seconds. 81V. From the maximum voltage of a period there was a continuous decrease of the cell voltage and at a certain point it dropped massively but increased immediately again to a maximum.

All the measurements were done after slow heating ( 2 Kimin) to an anode temperature o f 733°C. The test rig furnace was always adjusted in such a way as to obtain a temperature of 733°C measured with the anode thermocouple placed very closely to the anode. When the Cb-air flow was increased usually the fiirnace temperature had to be lowered in order to maintain the same' anode temperature. When the flow was decreased the furnace temperature had to be raised. The anode gas flow was varied from 70-1000 mWmin.

During the majority of the test, the cell temperature was maintained at 750°C. In addition to investigating the effects of cathode atmosphere, the stack was thermally cycled once during the course of the stack element test at t = 2000 h and five times just prior to termination. mid' to room temperature and back to operating conditions. At the conclusion of the thermal cycles, the leak rate was measured to determine if any catastrophic fracturing had occurred within the glass seals or electrolyte.

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