(Zr,Hf)3Ni3Sb4-based n-type thermoelectric conversion material
AssigneePanasonic Corporation
InventorsHiromasa Tamaki, Tsutomu Kanno, Akihiro Sakai, Kohei Takahashi, Hideo Kusada, Yuka Yamada
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Abstract
An n-type thermoelectric conversion material expressed in a chemical formula X3-xX′xT3-yCuySb4 (0≦x<3, 0≦y<3.0, and x+y>0), the X includes one or more element(s) of Zr and Hf, the X′ includes one or more element(s) of Nb and Ta, and the T includes one or more element(s) selected from Ni, Pd, and Pt, while including at least Ni, the n-type thermoelectric conversion material expressed in the chemical formula X3-xX′xT3-yCuySb4 has symmetry of a cubic crystal belonging to a space group I-43d.
Claims12
An n-type thermoelectric conversion material expressed in a chemical formula X3-xX′xT3-yCuySb4 (0≦x<3, 0≦y<3.0, and x+y>0), wherein
- the X comprises one or more element(s) of Zr and Hf,
- the X′ comprises one or more element(s) of Nb and Ta,
- the T comprises one or more element(s) selected from Ni, Pd, and Pt, while including at least Ni, and
- the material expressed in the chemical formula X3-xX′xT3-yCuySb4 has symmetry of a cubic crystal belonging to a space group I-43d.
A production method of an n-type thermoelectric conversion material, comprising:
- (1) a first step of weighing raw materials comprising one or more element(s) (X) of Zr and Hf, one or more element(s) (X′) of Nb and Ta, and one or more element(s) (T) selected from Ni, Pd, and Pt, while including at least Ni, Cu, and Sb for amounts corresponding to stoichiometric ratios in a chemical formula X3-xX′xT3-yCuySb4 (0≦x<3, 0≦y<3, and x+y>0), the material expressed in the chemical formula X3-xX′xT3-yCuySb4 having symmetry of a cubic crystal belonging to a space group I-43d;
- (2) a second step of acquiring an alloy “A” by alloying the raw materials that comprise the selected elements of Zr,Hf, Nb, Ta, Ni, Pd, Pt, and Cu;
- and
- (3) a third step of acquiring the n-type thermoelectric conversion material that comprises an alloy B, by melting and cooling the acquired alloy A and the raw material comprising Sb.
Dependencies are inferred from the claim text.