【摘要】 用熔融法结合放电等离子快速烧结(SPS)制备出了单相的Sm和Ce复合掺杂的Skutterudite化合物SmmCenFe1.5Co2.5Sb12,研究了Sm和Ce复合掺杂总量对其热电性能的影响规律.结果表明随着Sm和Ce复合掺杂总量的增加,p型SmmCenFe1.5Co2.5Sb12化合物的Seebeck系数增加、电导率和热导率降低.当掺杂总量相近时,和Sm、Ce单原子掺杂相比,Sm和Ce复合掺杂使Skutterudite化合物的热导率低10%—40%.Sm0.22Ce0.20Fe1.54Co2.46Sb11.89化合物的最大热电性能指数ZTmax值在775K时为0.84.更多还原

【Abstract】 Multiple-doped skutterudites Sm_mCe_nFe_ 1.5 Co_ 2.5 Sb_ 12 were prepared by melting and spark plasma sintering method,and the effects of doping atoms Sm and Ce on the thermoelectric properties of these compounds were investigated. For p-type Sm_mCe_nFe_ 1.5 Co_ 2.5 Sb_ 12 ,with the Sm and Ce multiple-doping amount increasing,the electrical conductivity and the thermal conductivity decrease and the Seebeck coefficient increases. When the doping amount is similar,in comparison with the Sm or Ce doping,the Sm and Ce multiple-doping can lower the thermal conductivity of skutterudites 10%—40%. At 775K,the ZT_ max value of 0.84 was obtained for Sm_ 0.22 Ce_ 0.20 Fe_ 154 Co_ 2.46 Sb_ 11.89 .更多还原