Thermoelectric Properties of Bulk FeSb2 and the Composite of FeSb2 and CoSb3 Prepared by Sintering
For investigating the thermoelectric properties, bulk FeSb2 and the composite of CoSb3:FeSb2=7:3 was prepared via sintering. The phases of samples were analyzed by X-ray diffraction and their thermoelectric properties were tested by electric constant instrument and laser thermal constant instrument. Experimental results show that, bulk FeSb2 and the composite of CoSb3:FeSb2=7:3 are P-type semiconductor materials. The electric resistivity of bulk FeSb2 sample increases with temperature rising while that of the composite (CoSb3:FeSb2=7:3) decreases with temperature rising. The Seebeck coefficient of the composite (CoSb3:FeSb2=7:3) is evidently higher than that of bulk FeSb2. The thermal conductivities of the composite (CoSb3:FeSb2=7:3) are relatively lower than those of bulk FeSb2. The ZT values of bulk FeSb2 sample are lower than those of the composite (CoSb3:FeSb2=7:3), that of the later increases with temperature rising at 100~500°C, the maximum value is up to 0.1647.
Dongye Sun, Wen-Pei Sung and Ran Chen
K. G. Liu and J. Li, "Thermoelectric Properties of Bulk FeSb2 and the Composite of FeSb2 and CoSb3 Prepared by Sintering", Applied Mechanics and Materials, Vols. 71-78, pp. 3741-3744, 2011