Sr_(0.9)Ba_(0.1-x)Ti_(0.8)Nb_(0.2)O_3 ceramics(x=0,0.01,0.02 and 0.05) are prepared by solid state reaction,whose thermoelectric properties are investigated from 323 K to 1073 K.By introducing A-site nonstoichiometry,the absolute Seebeck coefficient is enhanced,while the electrical resistivity is surprisingly reduced due to the significantly enhanced carrier mobility.These results are dramatic in thermoelectric materials,effectively enhancing the power factor.Moreover,the thermal conductivity is reduced,thu...
【英文摘要】
Sr_(0.9)Ba_(0.1-x)Ti_(0.8)Nb_(0.2)O_3 ceramics(x=0,0.01,0.02 and 0.05) are prepared by solid state reaction,whose thermoelectric properties are investigated from 323 K to 1073 K.By introducing A-site nonstoichiometry,the absolute Seebeck coefficient is enhanced,while the electrical resistivity is surprisingly reduced due to the significantly enhanced carrier mobility.These results are dramatic in thermoelectric materials,effectively enhancing the power factor.Moreover,the thermal conductivity is reduced,thu...
【基金】
Supported by the National Basic Research Program of China under Grant No 2013CB632506;
the National Natural Science Foundation of China under Grant Nos 51202132,51002087 and 11374186;
the Independent Innovation Foundation of Shandong University under Grant No IIFSDU 2012TS028
【更新日期】
2024-04-14 12:20
【分类号】
TQ174.7
【正文快照】
Thermoelectric(TE)materials have attractedgreat interest because of their potential application insolid-state cooling and power generation from wasteheatJ1—3]The performance of a TE material is evalu-ated by the figure-of-merit ZT=S2T/where 5,T,and?are t
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