采用高温高压方法,在900K的温度条件下,成功合成出CoSb2.750TexGe0.250-x(x=0.125,0.175,0.200)n型方钴矿化合物,并考察了不同的压力对其电输运性能的影响规律.室温下对样品的电阻率(ρ),Seebeck系数(S)进行了测试分析.电学性能测试表明,方钴矿CoSb2.750TexGe0.250-x化合物的导电类型为n型,电阻率和Seebeck系数的绝对值随着压力的升高而增加,随着Te掺杂量的增加而降低.功率因子随合成压力增大而降低,随Te掺杂量的增加而升高.CoSb2.750Te0.200Ge0.050在2GPa时具有最大的功率因子为7.59μW/(cm·K2).
参考文献
[1] | Sales B C;Mandrus D;Williams R K et al.[J].Science,1996,272:1325-1328. |
[2] | Bennett G L.CRC Handbook of Thermoelectric[M].New York:crc Press,1995:515-537. |
[3] | Slack G A.New Materials and Performance Limits of Thermoelectric Cooling[M].New York:crc Press,1995:407-440. |
[4] | Badding JV. .High-pressure synthesis, characterization, and tuning of solid state materials [Review][J].Annual review of materials research,1998(0):631-658. |
[5] | Pinwen Zhu;Yoshio Imai;Yukihiro Isoda .Electrical Transport and Thermoelectric Properties of PbTe Prepared by HPHT[J].Materials transactions,2004(11):3102-3105. |
[6] | Su T C;Zhu P W;Ma H A et al.[J].Journal of Alloys and Compounds,2006,422(01):328-331. |
[7] | Deng L;Ma H A;Su T C et al.[J].Materials Letters,2009,63:2139-2141. |
[8] | Polvani D A;Meng J F;Sharp J et al.[J].Chemistry of Materials,2001,13:2068-2071. |
[9] | Meng J F;Shekar N V C;Chung D Y et al.[J].Journal of Applied Physics,2003,94:4485-4487. |
[10] | Thonhauser T;Jeon G S;Mahan G D et al.[J].Physical Review B:Condensed Matter,2003,68:205-207. |
[11] | Borsshchevsky A;Fleurial J P.[A].,1999:31-33. |
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