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Strontium titanate
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Proceedings Papers
ITSC2014, Thermal Spray 2014: Proceedings from the International Thermal Spray Conference, 768-773, May 21–23, 2014,
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Lanthanum-doped strontium titanate (LST) and samarium-doped ceria (SDC) are promising materials for intermediate-temperature solid oxide fuel cells (IT-SOFCs). In this study, LST-SDC composite anodes are produced by suspension plasma spraying and the effects of annealing are assessed. XRD results show that the coatings and powders have the same phase structure. The coatings have a fine porous structure which is beneficial for gas permeability and long three-phase boundaries that facilitate anode reactions. A single cell based on the LST-SDC composite anode was found to perform well at 650-800°C. The results show that annealing improves interface bonding between particles in the anode and at the interface between the anode and electrolyte.
Proceedings Papers
ITSC 2008, Thermal Spray 2008: Proceedings from the International Thermal Spray Conference, 495-499, June 2–4, 2008,
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SrTiO x is an expected oxide thermoelectric material, which performance can be improved by doping Y 3+ in place of Sr 2+ . However, the maximum content of Y 3+ is limited to about 10% because of the phase transformation in the equilibrium sintered material. By contrast, plasma sprayed (Sr, Y)TiO x , which was essentially rapidly quenched, could solve Y up to 20% of Sr-site without the second phase, and produce the increase in the electric conductivity and the decrease in the thermal conductivity. But the absolute value of Seebeck coefficient decreased with an increase of Y content. As the result, the ZT value, which showed the performance for thermoelectric power generation, was reached only 0.1 in the Y content range 10% to 25% of Sr site.