| Te对Bi0.85Sb0.15低温热电性能的影响 |
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| 引用本文： | 宋春梅.Te对Bi0.85Sb0.15低温热电性能的影响[J].遵义师范学院学报,2007,9(4):57-59. |
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| 作者姓名： | 宋春梅 |
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| 作者单位： | 遵义师范学院,物理系,贵州,遵义,563002 |
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| 摘 要： | 采用机械合金化法在553K、6Gp下压制30分钟获得Bi_(0.85)Sb_(0.15) x%Te(其中,x=0.1、0.2、0.5、1和2)的纳米晶热电材料,并对Bi_(0.85)Sb_(0.15) x%Te材料的热电性能进行了研究。通过对样品的X-ray衍射实验分析,证实已形成了单相合金。在80-300K温区测量了样品的Seebeck系数、热导率和电导率,并计算出材料的优质参数。结果表明:Bi_(0.85)Sb_(0.15) x%Te材料在80-300K温区表现出金属特征。Bi_(0.85)Sb_(0.15) 0.1%Te样品的电导率要比Bi_(0.85)Sb_(0.15)样品电导率高2-3倍,而Seebeck系数绝对值比Bi_(0.85)Sb_(1.15)样品减少了近80%。表明掺入Te可以提高Bi_(0.85)Sb_(0.15)纳米晶粉末材料的电导率。
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| 关 键 词： | 热电材料 掺杂 高压 优质参数 |
| 文章编号： | 10093583（2007）-04-0057-03 |
| 修稿时间： | 2007-05-11 |
Effect of Te on the low temperature thermoelectric properties of Bi0.85Sb0.15 |
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| SONG Chun-Mei.Effect of Te on the low temperature thermoelectric properties of Bi0.85Sb0.15[J].Journal of Zunyi Normal College,2007,9(4):57-59. |
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| Authors: | SONG Chun-Mei |
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| Institution: | Department of physics, Zunyi Normal College, Zunyi 563002,, China |
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| Abstract: | Nano crystallite Bie_(0.85)Sb_(0.15) x%Te(x=0.1,0.2,0.5 and 2)powders were prepared by mechanical alloying method. The powders were pressed into pellets and then pressed to form bulk samples under high pressure of 6 GPa at 553K for 30 minutes.The X-ray diffraction analysis indicated that single phase was formed.Seebeck coefficient,electrical conductivity and thermal conductivity were measured in the temperature range of 80-300 K.The figure-of-merits of all samples were calculated.All samples show the feature of metal.The electrical conductivity of Bi_(0.85)Sb_(0.15) 0.1% Te is 2-3 times larger than that of Bi_(0.85)Sb_(0.15),however,the Seebeck coefficient of Bi_(0.85)Sb_(0.15) 0.1% Te is 80% lower than that of Bi_(0.85)Sb_(0.15).The re- suits shows that dopant of Te can improve the electrical conductivity of Bi_(0.85)Sb_(0.15). |
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| Keywords: | thermoelectric material doping high press figure of merit |
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