We report the synthesis of Nd-filled and Fe substituted p-type Ndx Fe(3.2)Co(0.8)Fe(3.2)Co(0.8)Sb(12)(x=0.5,0.6,0.7,0.8,and 0.9)skutterudites by the solid-state reaction method.The influences of Nd filler ...We report the synthesis of Nd-filled and Fe substituted p-type Ndx Fe(3.2)Co(0.8)Fe(3.2)Co(0.8)Sb(12)(x=0.5,0.6,0.7,0.8,and 0.9)skutterudites by the solid-state reaction method.The influences of Nd filler on the electrical and thermal transport prop-erties are investigated in a temperature range from room temperature to 850 K.A lowest lattice thermal conductivity of 0.88 W·m^-1·K^-1 is obtained in Nd0.8Fe(3.2)Co(0.8)Fe(3.2)Co(0.8)Sb(12)at 673 K,which results from the localized vibration modes of fillers and the increase of grains boundaries.Meanwhile,the maximum power factor is 2.77 m W·m^-1·K^-2 for the Nd(0.9)Fe(3.2)Co(0.8)Fe(3.2)Co(0.8)Sb(12)sample at 668 K.Overall,the highest dimensionless figure of merit z T=0.87 is achieved at 714 Kfor Nd(0.9)Fe(3.2)Co(0.8)Fe(3.2)Co(0.8)Sb(12).展开更多
基金Project supported by the National Natural Science Foundation of China(Grant Nos.11674040,11404044,51472036,51672270,and 51401202)the Fundamental Research Funds for the Central Universities(Grant No.106112016CDJZR308808)+1 种基金the 100 Talent Program of the Chinese Academy of Sciences(Grant No.2013-46)the Project for Fundamental and Frontier Research in Chongqing,China(Grant No.CSTC2015JCYJBX0026)
文摘We report the synthesis of Nd-filled and Fe substituted p-type Ndx Fe(3.2)Co(0.8)Fe(3.2)Co(0.8)Sb(12)(x=0.5,0.6,0.7,0.8,and 0.9)skutterudites by the solid-state reaction method.The influences of Nd filler on the electrical and thermal transport prop-erties are investigated in a temperature range from room temperature to 850 K.A lowest lattice thermal conductivity of 0.88 W·m^-1·K^-1 is obtained in Nd0.8Fe(3.2)Co(0.8)Fe(3.2)Co(0.8)Sb(12)at 673 K,which results from the localized vibration modes of fillers and the increase of grains boundaries.Meanwhile,the maximum power factor is 2.77 m W·m^-1·K^-2 for the Nd(0.9)Fe(3.2)Co(0.8)Fe(3.2)Co(0.8)Sb(12)sample at 668 K.Overall,the highest dimensionless figure of merit z T=0.87 is achieved at 714 Kfor Nd(0.9)Fe(3.2)Co(0.8)Fe(3.2)Co(0.8)Sb(12).