Thermoelectric transducing material, and method for producing the same
AssigneeMatsushita Electric Industrial Co., Ltd.
InventorsHideaki Adachi, Akihiro Odagawa
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Abstract
A thermoelectric transducing material according to this invention includes a layered cobaltite based substance represented by the chemical formula AxCoO2, wherein A consists of an element or element group selected from alkali metal elements and alkali earth group elements and is compositionally modulated in a thickness-wise direction of layers in a structure of the layered cobaltite based substance.
Claims23
A thermoelectric transducing material comprising a layered cobaltite based substance represented by the chemical formula AxCoO2, wherein x is not less than 0.2 and not more than 1 and wherein A consists of an element selected from the group consisting of Na, K, Sr, Ca and Ba, and is compositionally modulated in a thickness-wise direction of layers in a structure of the layered cobaltite based substance.
The thermoelectric transducing material according to claim 3, wherein x is not less than 0.4 and not more than 0.6.
A thermoelectric transducing material comprising a plural layered cobaltite based substance, at least one layer represented by the chemical formula A′xCoO2 and at least one other layer represented by the formula A″xCoO2, wherein x is not less than 0.2 and not more than 1 and wherein A′ and A″ each consists of an element selected from the group consisting of Na, K, Sr, Ca and Ba, the layered cobaltite based substance is structured such that at least one A′xCoO2 layer and at least one A″xCoO2 layer are stacked in a layer thickness direction, and is compositionally modulated in a thickness-wise direction of layers in a structure of the layered cobaltite based substance and A′ and A″ are different elements.
Dependencies are inferred from the claim text.