D. Kusano et al., Microstructure and thermoelectric properties of ZnO and (Zn0.98Al0.02)O thermoelectric material sintered from ultra fine oxide powder, J JPN METAL, 63(11), 1999, pp. 1429-1434
Thermoelectric properties of ZnO and (Zn0.98Al0.02)O alloys sintered under
different pressures, from ultra fine powder have been investigated. The sam
ples are with a grain size under 10 mu m. Electrical conductivity, Seebeck
coefficient and thermal conductivity of the samples are measured at tempera
tures ranging from 337 to 973 K. Electrical conductivity of the samples dec
reases with increasing temperature. Seebeck coefficient of the samples show
ed negative and the absolute value increased with increasing temperature. T
hermal conductivity of the samples decreased with increasing temperature. T
he electrical conductivity and Seebeck coefficient appeared relatively inse
nsitive to grain size, while the thermal conductivity did.