Porous Thermoelectric Materials with Functionally Graded Structures
Year: 1999
Type: article
Abstract: Porous thermoelectric devices utilizing heat convection by gas flow through the porous device has been proposed. Functionally gradation of thermoelectric and porous properties can satisfy with the requirment for the porous device. However, because many thermoclectric materials such as FeSi 2 , (Bi,Sb) 2 Te 3 and PbTe are generally brittle, development of processing of porous thermoelectric devices has been hoped. A novel hot press method was developed to form porous medium of the brittle FeSi 2 , (Bi,Sb) 2 Te 3 and PbTe materials. In this method, porosity ratio was controlled upto 35% and permeability in order of 10 -9 or 10 -10 m 2 , and functional gradation of porous properties can he achieve. By this method, the functionally graded porous devices was also formed for FeSi 2 /(Bi,Sb) 2 Te 3 and (Bi,Sb) 2 Te 3 /PbTe systems.
Source: Materials science forum
Institutions: The University of Osaka, Tokyo Institute of Technology
Language: English
Subfield: Materials Chemistry
Field: Materials Science
Domain: Physical Sciences
Open Access status: hybrid
OpenAlex ID: W2025399297