Authors: Huiyuan Geng Takahiro Ochi Shogo Suzuki Masaaki Kikuchi Satoru Ito Junqing Guo
Publish Date: 2013/03/02
Volume: 42, Issue: 7, Pages: 1999-2005
Abstract
Bulk multifilled n and ptype skutterudites with La as the main filler were fabricated using the spark plasma sintering SPS method The thermoelectric properties and thermal stability of these skutterudites were investigated It was found that the interactions among the filling atoms also play a vital role in reducing the lattice thermal conductivity of the multifilled skutterudites ZT = 076 for ptype La08Ba001Ga01Ti01Fe3CoSb12 and ZT = 10 for ntype La03Ca01Al01Ga01In02Co375Fe025Sb12 skutterudites have been achieved Furthermore the differential scanning calorimetry DSC results show that there is no skutterudite phase decomposition till 750°C for the La08Ba001Ga01Ti01Fe3CoSb12 sample The thermal stability of the La08Ba001Ga01Ti01Fe3CoSb12 skutterudite is greatly improved Using the developed multifilled skutterudites the fabricated module with size of 50 mm × 50 mm × 76 mm possesses maximum output power of 32 W under the condition of hot/cold sides = 600°C/50°C
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