Fe对CeyFexCo4-xSb12化合物结 构和热电传输性质的影响

用熔融法合成了单相填充式skutterudite化合物Ce_yFe_xCo_4-x Sb₁₂(x=0—3.0,y=0—0.74).对Ce的填充范围，置换Fe原子对化合物的结 构及热电传输特性的影响进行了研究，Ce的填充分数随Fe含量的增加而线性增加，当Fe含量 大约为3时，Ce的填充分数达到0.74.晶格常量a随Fe含量的增加而增加，Ce的填充使晶格常 量进一步增加.当Ce填充分数达到饱和状态时，Ce_y 关键词： 填充式skutterudite化合物 晶体结构 热电传输性质

EFFECT OF Fe CONTENT ON THE CRYSTAL STRUCTURE AND THE THERMOELECTRIC TRANSPORT P ROPERTIES OF CeyFexCo4-xSb12

Single-phase filled skutterudite compounds,Ce_yFe_xCo_{4- x}Sb₁₂(x=0—3.0，y=0—0.74)，were synthesized by a melting metho d.Effect of Fe content on Ce filling fraction,the crystal structure and the ther moelectric transport properties of Ce_yFe_xCo_4-xS b₁₂ saturated by Ce were investigated.Ce filling fraction increased l inearly with increasing Fe content.The lattice constants a of Ce_yFexCo_4-xSb₁₂ increased with increasing Fe content a nd Ce filling fraction.All samples showed p-type conduction.Hall coefficient RH decreased with increasing Fe content.Hole concentration p and electri cal conductivity σ increased with increasing Fe content.Seebeck coefficient α decreased with increasing Fe content.While Fe/Co ratio was about 1.5/2.5,the lat tice thermal conductivity (κ_l) reached the minimum values.