Thermoelectric conversion material, method for producing the same and thermoelectric conversion device
AssigneeSumitomo Chemical Company, Limited
InventorsTetsuro Tohma, Kazuo Sadaoka, Yoshio Uchida
Life of this patent
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Abstract
A thermoelectric conversion material contains a metal oxide comprising M1, M2 and oxygen, wherein M1 is at least one selected from the group consisting of Ca, Sr and Ba and may contain an element selected from the group consisting of Li, Na, K, Mg, La, Ce, Nd, Sm, Bi and Pb, and wherein M2 comprises Cu as an essential element and may contain an element selected from the group consisting of Ti, V, Cr, Mn, Fe, Co and Ni. The mole ratio of M2 to M1 (M2/M1) is 1.2 to 2.2.
Claims4
A thermoelectric conversion material containing a metal oxide represented by the formula (2):
- (M11)14(Cu1-yM22y)24O41-z (2)
- wherein M11 is a combination of Sr and Ca, a Ca:Sr molar ratio is from 4:10 to 8:6,
- M22 is at least one selected from the group consisting of Ti, V, Cr, Mn, Fe, Co and Ni,
- 0≦y≦0.5, and
- 0≦z≦3.
A method for producing the thermoelectric conversion material comprising the step of sintering a mixture of metal compounds containing M1 and M2 at from 600 to 1000° C.,
- wherein M1 is a combination of Sr and Ca and a Ca:Sr molar ratio is from 4:10 to 8:6,
- M2 comprises Cu and may contain one selected from the group consisting of Ti, V, Cr, Mn, Fe, Co and Ni, and
- the mole ratio of M2 to M1 (M2/M1) is 24/14.
Dependencies are inferred from the claim text.