Title :
Preparation of p- and n-type SiC-based thermoelectric materials by spark plasma sintering
Author :
Kado, Naomi ; Kitagawa, Hiroyuki ; Ueda, Yu. ; Kanayama, Nobuyuki ; Noda, Yasutoshi
Author_Institution :
Dept. of Material Sci., Shimane Univ., Matsue, Japan
Abstract :
We report on the preparation of Si3N4 or Al4C3 added SiC by spark plasma sintering (SPS) and their thermoelectric properties. The relative densities of all the sintered materials were more than 80% of the theoretical value. The conduction types were controlled by the addition of Si3N4 for n-type and Al4C3 for p-type. The electrical resistivity decreased and the Seebeck coefficient increased with temperature. We also found that the power factor depends on the composition of the Si3N4 or Al4C3 and takes the maximum value at 7wt% addition at 973K.
Keywords :
Seebeck effect; aluminium compounds; density; electrical conductivity; electrical resistivity; plasma materials processing; semiconductor materials; silicon compounds; sintering; thermoelectricity; Seebeck coefficient; SiC-Al4C3; SiC-Si3N4; SiC-based thermoelectric materials; composition dependence; conduction type; electrical resistivity; n-SiC-Si3N4; p-SiC-Al4C3; power factor; relative density; spark plasma sintering; temperature dependence; thermoelectric properties; Conducting materials; Electric resistance; Plasma density; Plasma materials processing; Plasma properties; Plasma temperature; Reactive power; Silicon carbide; Sparks; Thermoelectricity;
Conference_Titel :
Thermoelectrics, 2002. Proceedings ICT '02. Twenty-First International Conference on
Print_ISBN :
0-7803-7683-8
DOI :
10.1109/ICT.2002.1190290
