| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide an electron type thermoelectric conversion material which simultaneously shows a high Seebeck coefficient S, a low electric resistivity ρand a low thermal conductivity κ and which stably shows a high figure of merit in a high-temperature atmosphere. <P>SOLUTION: The electron type thermoelectric conversion material has a layer-like perovskite (A<SB>n+1</SB>B<SB>n</SB>O<SB>3n-1</SB>) structure and contains a manganese oxide of a composition represented by the formula: (AE<SB>1-y</SB>M1<SB>y</SB>)<SB>n+1</SB>(Mn<SB>1-z</SB>M2<SB>z</SB>)<SB>n</SB>O<SB>3n+1-δ</SB>(wherein A, E are each two or more types of alkali earth metal elements, M1 is a rare earth element and one or more types of Bi, Sn, Sb, In and Pb, M2 is one or more types of elements of Ru, Nb, M, W and Ta, 0≤y≤0.5, 1≤n≤5, 0≤z≤0.5, y+z>0, and -0.5≤δ≤+0.5), and a latitude factor is 0.9 to 1.0. <P>COPYRIGHT: (C)2004,JPO |
