National Institute of Advanced Industrial Science and Technology

Yasuo Iwamura

Atsushi Yamamoto

Shigeo Yamaguchi

A nitrogen-containing thermoelectric material, which has an element composition represented by:AlGaInMRON&#x2003;&#x2003;(A)orAlGaInMRDN&#x2003;&#x2003;(B)(wherein M represents a transition element; R represents a rare earth element; D represents at least one element selected from elements of the Group IV or II; 0&#x2266;z&#x2266;0.7, 0&#x2266;y&#x2266;0.7, 0.2&#x2266;x&#x2266;1.0, 0&#x2266;u&#x2266;0.7, 0&#x2266;v&#x2266;0.05, 0.9&#x2266;s+t&#x2266;1.7, 0.4&#x2266;s&#x2266;1.2, 0&#x2266;w&#x2266;0.2 and 0.9&#x2266;m&#x2266;1.1; and x+y+z=1), and has an absolute value of a Seebeck coefficient of 40 &#x3bc;V/K or more at a temperature of 100&#xb0; C. or more. These thermoelectric materials comprise elements having low toxicity, are excellent in a heat resistance, a chemical resistance and the like, and have a high thermoelectric transforming efficiency.

Thermoelectric transportation material containing nitrogen

A nitrogen-containing thermoelectric material, which has an element composition represented by:AlGaInMRON&#x2003;&#x2003;(A)orAlGaInMRDN&#x2003;&#x2003;(B)(wherein M represents a transition element; R represents a rare earth element; D represents at least one element selected from elements of the Group IV or II; 0&#x2266;z&#x2266;0.7, 0&#x2266;y&#x2266;0.7, 0.2&#x2266;x&#x2266;1.0, 0&#x2266;u&#x2266;0.7, 0&#x2266;v&#x2266;0.05, 0.9&#x2266;s+t&#x2266;1.7, 0.4&#x2266;s&#x2266;1.2, 0&#x2266;w&#x2266;0.2, and 0.9&#x2266;m&#x2266;1.1; and x+y+z=1), and has an absolute value of a Seebeck coefficient of 40 &#x3bc;V/K or more at a temperature of 100&#xb0; C. or more. These thermoelectric materials comprise elements having low toxicity, are excellent in a heat resistance, a chemical resistance and the like, and have a high thermoelectric transforming efficiency.

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Ibaraki, Japan

Yasuo Iwamura