| abstract |
(57) [Problem] To provide a novel material having excellent performance as an n-type thermoelectric conversion material. A general formula: La in 1-X M X NiO 2.7~3.3 (wherein, M represents, Na, K, Li, Zn , Pb, Ba, Ca, At least one element selected from Al, Nd, Bi and Y, and 0.01 ≦ x ≦ 0.8. Composition represented by), or the general formula: (La 1-X M X ) 2 NiO 3.6~4.4 (Wherein M and x are the same), and have a negative Seebeck coefficient at a temperature of 100 ° C. or higher. |