摘要
采用高温熔融法结合固相反应法合成了一系列单相的SmyFexCo4-xSb12化合物,并探索了Sm填充分数对其热电性能的影响规律。结果表明,随着Sm填充分数的增加,载流子浓度及电导率降低;塞贝克系数随温度的升高和Sm填充分数的增加而增大;晶格热导率随Sm填充分数的增加先减小然后再增加,在某一填充分数时达到最小值。Sm0.19Fe1.47Co2.53Sb12化合物显示最大热电性能指数,在750 K时其最大无量纲热电性能指数ZTmax值达0.55。
The single-phase SmyFexCo4-xSb12 compounds were synthesized by using the solid-state reaction method and melting reaction method, and the thermoelectric properties of SmyFexCo4-xSb12 were investigated. Research results indicated that the electrical conductivity of SmyFexCo4-xSb12 decreased with increasing Sm filling fraction, which the carrier concentration dramatically depends on. Seebeck coefficient increased with increasing temperature and Sm filling fraction. The lattice thermal conductivity decreased evidently with increasing Sra filling fraction,and reached the minimum value at a certain Sm filling fraction. The maximum figure of merit ZTmax of Sm0.19Fe1.47Co2.53Sb12 is 0.55 at 750 K.
出处
《武汉理工大学学报》
CAS
CSCD
北大核心
2007年第2期1-4,共4页
Journal of Wuhan University of Technology
基金
国家自然科学基金(50372049)
高校博士点科研专项基金(20030497004)
关键词
填充式方钴矿
电导率
晶格热导率
热电性能
filled-skutterudite
electrical conductivity
lattice thermal conductivity
thermoelectric performance
