摘要： p -Type Ca 1− x Eu x Zn 2 Sb 2 (0 ≤ x ≤ 1) polycrystalline specimens were prepared by direct solid-state reaction of elements followed by appropriate annealing, grinding and spark plasma sintering for densification. The thermoelectric (TE) properties of Zintl phase Ca 1− x Eu x Zn 2 Sb 2 were investigated by measuring resistivity, Seebeck coefficient and thermal conductivity from 300 K to 720 K. All Eu doped specimens show more than 50% decrease in electrical resistivity, while their Seebeck coefficient value only slightly decrease as compared to CaZn 2 Sb 2 . Furthermore, a reduction of thermal conductivity was achieved by the additional phonon scatterings of Eu dopants. The cationic substitution of rare earth element Eu in the Ca-site significantly increased the thermoelectric dimensionless figure of merit for all Europium substituted samples. Within this series, EuZn 2 Sb 2 shows a good thermoelectric property with a maximum zT value of 0.98 at 720 K. 其他題名： Journal of Elec Materi 出版者： New York: Springer US 出版日期： 2016-03-01 出處： Journal of electronic materials, 2016-03, Vol.45 (3), p.1942-1946 資源來源： EBSCOhost OmniFile Full Text Select 版權： The Minerals, Metals & Materials Society 2015 識別號： ISSN: 0361-5235 識別號： EISSN: 1543-186X 識別號： DOI: 10.1007/s11664-015-4303-6
