エネルギー・リサイクル技術としての熱電変換技術 : SPS 法による高温域用熱電素子の作製 (<特集>環境問題)

概要

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Thermoelectric energy conversion systems, which are the simplest way to covert heat to electricity directly, are recognized important as one of energy recycle systems in order to establish an environmentally friendly, economical energy conversion system. In the paper the contribution of the reduction of CO_2 due to thermoelectric energy conversion system using the waste heat and the resent development of high temperature thermoelectric element are presented, Based on the present technology (ZT=0.77) and the advanced technology (ZT=2) on thermoelectric element the potential contribution was estimated several million Kl of oil equivalent by the usage of the waste heat from solid waste combustion and car and, trucks etc. High temperature metal silicides such as Chromium Silicide (M.P. 1763K) have been researched as the promising thermoelectric element. It is clarified that the spark plasma sintering method has been very useful to make a high temperature thermoelectric materials such as Chromium Silicides. The temperature dependense of thermoelectric properties such as the Seebeck coefficient, electrical resistively, power factor, thermal conductivity, carrier concentration was measured to find out the preferable preparation processing condition. The maximum power factor could be obtained 0.7×10^<-2>W/mK^2 at 900K.
湘南工科大学の論文
2000-03-25