Ce填充分数对p型CeyFe1.5Co2.5Sb12化合 物热电传输特性的影响

研究了Ce填充分数对富Co组成的填充式skutterudite化合物：Ce_yFe_{1.5Co2.5Sb12(y=0—0.46)的热电传输特性的影响.CeyFe1.5Co2.5Sb12有现为p型传导.霍尔系数ＲH随Ce填充分数的增加而增加，空穴浓度p和电导率σ随Ce填充分数的增加而减少.泽贝克 系数α随Ce填 关键词： 填充分数 载流子浓度 电导率 泽贝克系数 晶格热导率}

EFFECT OF Ce FILLING FRACTION ON THERMOELECTRIC TRANSPORT PROPERTIES OF p-TYPE C eyFe1.5Co2.5Sb12

Effect of Ce filling fraction on the thermoelectric transport properties of p-ty pe Co-rich filled skutteudite compounds:Ce_yFe_1.5Co_2.5 Sb₁₂ (y=0—0.46) were investigated. Ce_yFe_{1.5Co2.5Sb12 showed p-type conduction. Hall coefficient R< sub>H} increased with increasing Ce filling fraction. Hole concentration p and electrical conductivity σ decreased with increasing Ce filling fraction. Se ebeck coefficient α increased with increasing Ce filling fraction. when Ce fill ing fraction was about 0.3, the lattice thermal conductivity κ_l reac hed the minimum value.It indicated that the effect of Ce rattling on phonon scat tering was the strongest as Sb-dodecahedron partial voids were filled by Ce. A m aximum ZT value of 1.1 was obtained for Co-rich Ce_0.28Fe_{1.52Co2.48Sb12 at 750K.}