THERMOELECTRIC CONVERSION MATERIAL

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PROBLEM TO BE SOLVED : To provide a thermoelectric conversion material superior in heat resistance. SOLUTION : A thermoelectric conversion material has a composition represented by the following general formula : LkRrTt-mMmSbx, where L represents at least one element selected from rare earth elements; R represents two or more elements selected from a group consisting of alkali metal elements, alkali-earth metal elements, Group IV elements, and Group XIII elements; T represents at least one element selected from Fe and Co; M represents at least one element selected from a group consisting of Ru, Os, Rh, Ir, Ni, Pd, Pt, Cu, Ag and Au; 0.50≤k≤1.00, 0.1≤r≤0.5, 3.0≤t-m≤5.0, 0≤m≤0.5 and 10.0≤x≤11.5; and x/t<3.0 holds. SELECTED DRAWING : Figure 1 COPYRIGHT : (C)2019, JPO&INPIT