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N型La0.9NixCo4-xSb12化合物的制备及热电性能研究
Preparation and thermoelectric pro perties of n -type La0.9NixCo4-xSb12 compounds
【摘要】 采用放电等离子烧结(SPS)方法制备了N型La0.9NixCo4-xSb12(x=0.05-1.0)化合物热电材料。借助于先进的结构和性能表征手段,系统研究了Ni含量对化合物热电性能的影响规律。实验结果表明,随着Ni含量增加,La0.9NixCo4-xSb12化合物的电阻率和Seebeck系数减小。当Ni含量x<0.6时,化合物的热导率随Ni含量增大而降低,说明加入一定量的Ni能很好地降低材料的热导率。N型La0.9Ni0.4Co3.6Sb12化合物在温度773K时具有最大的热电性能优值(ZT)0.4558。
【Abstract】 The n -type La 0.9 Ni x Co 4-x Sb 12 (x =0.05-1.0)compounds was prepared by spark plasma sintering and the thermoelectric pr operties including Seebeck coeffic ient,specific resistance and therm al conductivity were tested on Ulvac -Riko ZEM-2and TC -7000.The experimen tal results show that the electrical resistivity and Seeb eck coefficient decrease with the ad dition of Ni.Also the thermal conductivity is dependent on the Ni c ontent.The maximum ZT value of 0.4558is obtained at 773K for n -type La 0.9 Ni 0.4 Co 3.6 Sb 12 compounds.
【Key words】 n -type thermoelectric materials; skutterudite compound; Ni substitu tion; thermoelectric properties;
- 【文献出处】 功能材料与器件学报 ,Journal of Functional Materials and Devices , 编辑部邮箱 ,2004年01期
- 【分类号】TB381
- 【被引频次】14
- 【下载频次】138