Thermoelectric conversion module
The present invention aims at providing a thermoelectric conversion module with low toxicity, which exhibits conversion efficiency equivalent to that of BiTe. The thermoelectric conversion module of the present invention employs a full Heusler alloy as the material for forming the P-type thermoelectric conversion unit and the N-type thermoelectric conversion unit. The material for forming the N-type thermoelectric conversion unit contains at least any one of Fe, Ti, and Si and Sn.
1. A thermoelectric conversion module comprising:
a P-type thermoelectric conversion unit and an N-type thermoelectric conversion unit; and
a substrate on which the P-type thermoelectric conversion unit and the N-type thermoelectric conversion unit are mounted,
wherein a full Heusler alloy is used as a material for forming the P-type thermoelectric conversion unit and the N-type thermoelectric conversion unit,
wherein the full Heusler alloy forming the N-type thermoelectric conversion unit consists of Fe, Ti, at least one of Si or Sn, and an additive material of at least one of Nb, V, Mo, W, or Zr,
wherein an amount of the additive material is smaller than an amount of Ti in the full Heusler alloy forming the n-type thermoelectric conversion unit,
wherein the full Heusler alloy forming the P-type thermoelectric conversion unit is different from the full Heusler alloy forming the N-type thermoelectric conversion unit,
wherein a ratio of a cross-section area of the P-type thermoelectric conversion unit on a plane orthogonal to a normal direction of the substrate to a sum total of the cross-section area of the P-type thermoelectric conversion unit on the plane and a cross-section area of the N-type thermoelectric conversion unit on the plane is in a range from 0.42 to less than 0.5,
wherein the cross-section area of the N-type thermoelectric conversion unit is larger than the cross-section area of the P-type thermoelectric conversion unit, and
wherein a length of the P-type thermoelectric conversion unit in the normal direction of the substrate and a length of the N-type thermoelectric conversion unit in the normal direction are in a range from 6 mm to 14.5 mm.
2. The thermoelectric conversion module according to claim 1 ,
wherein a ratio of the length of the P-type thermoelectric conversion unit in the normal direction of the substrate to a square root of the cross-section area of the N-type thermoelectric conversion unit on the plane or a ratio of the length of the N-type thermoelectric conversion unit in the normal direction to the square root of the cross-section area of the N-type thermoelectric conversion unit on the plane is in a range from 0.6 to 1.8.
3. The thermoelectric conversion module according to claim 1 ,
wherein the P-type thermoelectric conversion unit and the N-type thermoelectric conversion unit are electrically connected in series via an electrode.
4. The thermoelectric conversion module according to claim 3 , wherein Cu, Au or Ta is used as a material for forming the electrode.
5. The thermoelectric conversion module according to claim 3 , wherein the full Heusler alloy forming the P-type thermoelectric conversion unit contains Fe, V, and Al.
6. A thermoelectric conversion module comprising:
a P-type thermoelectric conversion unit and an N-type thermoelectric conversion unit; and
a substrate on which the P-type thermoelectric conversion unit and the N-type thermoelectric conversion unit are mounted,
wherein a full Heusler alloy is used as a material for forming the P-type thermoelectric conversion unit and the N-type thermoelectric conversion unit,
wherein the full Heusler alloy forming the P-type thermoelectric conversion unit contains Fe, V, and Al,
wherein the full Heusler alloy forming the N-type thermoelectric conversion unit consists of Fe, Ti, at least one of Si or Sn, and an additive material of at least one of Nb, V, Mo, W, or Zr,
wherein an amount of the additive material is smaller than an amount of Ti in the full Heusler alloy forming the n-type thermoelectric conversion unit,
wherein the full Heusler alloy forming the P-type thermoelectric conversion unit is different from the full Heusler alloy forming the N-type thermoelectric conversion unit,
wherein a ratio of a cross-section area of the P-type thermoelectric conversion unit on a plane orthogonal to a normal direction of the substrate to a sum total of the cross-section area of the P-type thermoelectric conversion unit on the plane and a cross-section area of the N-type thermoelectric conversion unit on the plane is in a range from 0.42 to less than 0.5,
wherein the cross-section area of the N-type thermoelectric conversion unit is larger than the cross-section area of the P-type thermoelectric conversion unit, and
wherein a length of the P-type thermoelectric conversion unit in the normal direction of the substrate and a length of the N-type thermoelectric conversion unit in the normal direction are in a range from 0.5 mm to 14.5 mm.
7. The thermoelectric conversion module according to claim 6 ,
wherein a ratio of the length of the P-type thermoelectric conversion unit in the normal direction of the substrate to a square root of the cross-section area of the N-type thermoelectric conversion unit on the plane or a ratio of the length of the N-type thermoelectric conversion unit in the normal direction to the square root of the cross-section area of the N-type thermoelectric conversion unit on the plane is in a range from 0.6 to 1.8.
8. A thermoelectric conversion module comprising:
a P-type thermoelectric conversion unit and an N-type thermoelectric conversion unit; and
a substrate on which the P-type thermoelectric conversion unit and the N-type thermoelectric conversion unit are mounted,
wherein a full Heusler alloy is used as a material for forming the P-type thermoelectric conversion unit and the N-type thermoelectric conversion unit,
wherein the full Heusler alloy forming the N-type thermoelectric conversion unit consists of Fe, Ti, at least one of Si or Sn, and an additive material of at least one of Nb, V, Mo, W, or Zr,
wherein an amount of the additive material is smaller than an amount of Ti in the full Heusler alloy forming the n-type thermoelectric conversion unit,
wherein a ratio of a length of the P-type thermoelectric conversion unit in a normal direction of the substrate to a square root of a cross-section area of the N-type thermoelectric conversion unit on a plane orthogonal to the normal direction or a ratio of a length of the N-type thermoelectric conversion unit in the normal direction to the square root of the cross-section area of the N-type thermoelectric conversion unit on the plane is in a range from 0.6 to 1.8,
wherein a cross-section area of the N-type thermoelectric conversion unit on the plane orthogonal to the normal direction is larger than the cross-section area of the P-type thermoelectric conversion unit, and
wherein the length of the P-type thermoelectric conversion unit in the normal direction of the substrate or the length of the N-type thermoelectric conversion unit in the normal direction is in a range from 0.5 mm to 14.5 mm.