Abstract
It is important to control dopant concentration with different amount for n-type PbTe thermoelement with graded structure. It was clarified that the starting materials by a gas transport method have quite homogeneous thermoelectric properties. PbTe sintered compacts were prepared by means of hot pressing technique. Hall mobility μH of the sintered compacts with the dopant amount of 0.20 mass% exceeded 0.1 m2Ns at room temperature. This value is comparative to those of single crystals. The high value of μH led to the high thermoelectric performance.
It is found that gas transport method is a promising method to prepare the starting materials for fabricating PbTe thermoelement with grade structure.
