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1177 |
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Tuesday, June 03, 2008, Room 05 2:40 PM Case Studies and Further Applications 2 showing the broad variety of thermal spraying in different examples, special processes and also specialised materials apart from standard coatings offer new possibilities and also new markets |
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Thermoelectric properties of plasma sprayed (Sr, Y) TiOx thick film |
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Satoshi Sodeoka* / National Institute of Advanced Industrial Science and Technology, Japan Masato Suzuki / AIST, Japan Takahiro Inoue/ AIST, Japan Haruhiko Obara/ AIST, Japan |
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SrTiOx is an expected oxide thermoelectric material, which performance can be improved by doping Y3+ in place of Sr2+. However, the maximum content of Y3+ is limited to about 10% because of the phase transformation in the equilibrium sintered material. By contrast, plasma sprayed (Sr, Y)TiOx, 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. As the result, the ZT value, which showed the performance for thermoelectric power generation, was remarkably increased. |