稀有金属（英文版）
稀有金屬（英文版）
희유금속（영문판）
RARE METALS
2012年
1期
43-47
,共5页
nanoparticles%composites%thermoelectric properties
Nano-TiO2/Co4Sb11.7Te0.3 composites were prepared by mechanical alloying (MA) and cold isostatic pressing (CIP) process.The phase composition,microstructure,and therrnoelectric properties were characterized.The diffraction spectra of all samples well corresponds to CoSb3 skutterudite diffraction plane.TiO2 agglomerates into irregular clusters.They locate at the grain boundaries or some are distributed on the surface of Co4Sb11.7Te0.3 particles.For composites with high TiO2 content (0.6％ and 1.0％ TiO2),the phonon scattering by TiO2 particle,pores,and small size grains can result in a remarkable reduction in thermal conductivity.The maximum value of ZTis 0.79 for sample with 0.6 wt.％ TiO2 at 700 K,which is 11％ higher than that of non-dispersed sample.
