Abstract:
The Ca
3Co
3.9Cu
0.1O
9 powder synthesized by solvent method was sintered with various Bi
2O
3 for Ca
3Co
3.9Cu
0.1O
9/Bi
2Ca
2Co
2O
y composites in this article, and the effects of Bi
2O
3 addition on the thermoelectric properties of the composite were studied. The study shows that the addition of Bi
2O
3 can get denser samples, and with the Bi
2O
3 increasing, the electrical resistivity decreases sharply while Seebeck coefficient changs little and this results in a maximum power factor of 3.27×10
-4 Wm
-1K
-2 in Ca
3Co
3.9Cu
0.1O
9 (Bi
2O
3)
0.2 sample at 973 K.