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- W1547501412 abstract "Single-phase Ba0.3In0.2Ni0.05Co3.95Sb12 bulk materials were synthesized by melting and spark plasma sin- tering (SPS) methods. Ba0.3In0.2Ni0.05Co3.95Sb12/SiO2 nanocomposite material with nano-SiO2 coating was prepared by wet chemical coating processing. Emphases were given on the evolution of microstructure, chemical composi- tion, and thermoelectric properties of two kinds of (Ba,In) double-atom filled skutterudite based bulk materials dur- ing periodic thermal cycling 2000 times in the range of 300-723-300 K. It was found that the thermal stability of (Ba,In) double-atom filled skutterudite was remarkably improved after nano-SiO2 coated. The microstructure and chemical composition along the grain boundaries of single-phase Ba0.3In0.2Ni0.05Co3.95Sb12 bulk material obviously changed, while the thermal cycling had no effect on Ba0.3In0.2Ni0.05Co3.95Sb12/SiO2 nanocomposite. Thus the nano-SiO2 stabilized the grain boundary and prevented the elements diffusing and volatilizing from intra-grain. The ZT values of two kinds of materials were very close and kept unchanged at 300 K and 500 K during the thermal cy- cling. The ZT values of single-phase bulk materials gradually decreased at 800 K. However, the ZT values of nano- composite mainly depended on the complex changes in thermal conductivity and increased with prolonging of quenching time, then reached 1.12 at 800 K after quenching for 1800 times, which was even higher than those of" @default.
- W1547501412 created "2016-06-24" @default.
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- W1547501412 date "2010-01-01" @default.
- W1547501412 modified "2023-09-24" @default.
- W1547501412 title "Enhancement of Thermal Stability of Filled Skutterudite Thermoelectric Materials through Nano-SiO2 Coating" @default.
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