以3+价的Y作为填充原子,在y=0~0.4的组成范围内,合成了填充式方钴矿化合物YyFexCo4-xSb12,系统研究了Y填充分数对p型YyFexCo4-xSb12化合物电性能和热性能的影响.所有样品均显示为p型传导,随着Y填充分数的增加,方钴矿化合物的电导率下降;塞贝克系数随着温度的升高和Y填充分数的增加而增大,同时峰值朝低温方向移动.晶格热导率随Y填充分数的增加先减小后增加,在一定填充分数y时达到最小值.填充在Sb的20面体空洞中的Ba、Ce、Y原子能显著降低其晶格热导率,且晶格热导率降低幅度按Ba、Ce、Y离子半径减小的顺序增大.无量纲热电性能指数ZT随温度的升高而增大,组成为Y0.08Fe0.7Co3.3Sb12的填充式方钴矿化合物在750K时其最大无量纲热电性能指数ZT达0.7.
参考文献
[1] | Sales B C;Mandrus D;Williams R K .[J].Science,1996,272:1325. |
[2] | Nolas GS.;Morelli DT.;Tritt TM.;Ehrlich AC.;Slack GA. .THE EFFECT OF RARE-EARTH FILLING ON THE LATTICE THERMAL CONDUCTIVITY OF SKUTTERUDITES[J].Journal of Applied Physics,1996(8 Pt.1):4002-4008. |
[3] | Sales BC.;Chakoumakos BC.;Keppens V.;Thompson JR.;Mandrus D. .FILLED SKUTTERUDITE ANTIMONIDES - ELECTRON CRYSTALS AND PHONON GLASSES[J].Physical Review.B.Condensed Matter,1997(23):15081-15089. |
[4] | Chakoumakos B C;Sales B C;Mandrus D .[J].Acta Crystallographica,1999,B55:341. |
[5] | Morelli DT.;Chen BX.;Hu SQ.;Uher C.;Meisner GP. .CERIUM FILLING AND DOPING OF COBALT TRIANTIMONIDE[J].Physical Review.B.Condensed Matter,1997(12):7376-7383. |
[6] | Nolas GS.;Slack GA.;Cohn JL. .Effect of partial void filling on the lattice thermal conductivity of skudderudites[J].Physical Review.B.Condensed Matter,1998(1):164-170. |
[7] | Sales B C;Chakoumakos B C;Mandrus D .[J].Physical Review,2000,B61:2475. |
[8] | Chen L D;Kawahara T;Tang X F et al.[J].Journal of Applied Physics,2001,90:1864. |
[9] | Nolas G S;Takizawa H;Endo T et al.[J].Applied Physics Letters,2000,77:52. |
[10] | Caillat T.;Fleurial JP.;Borshchevsky A. .PROPERTIES OF SINGLE CRYSTALLINE SEMICONDUCTING COSB3[J].Journal of Applied Physics,1996(8):4442-4449. |
[11] | Tang X F;Chen L D;Goto T et al.[J].Journal of Materials Research,2002,17:2953. |
[12] | TANG Xinfeng,CHEN Lidong,Takashi Goto,Toshio Hirai,YUAN Runzhang.Solid state reaction synthesis of filled skutterudite compounds (Ce or Y)yFexCo4-xSb12 and the effect of filling atoms Ce or Y on lattice thermal conductivity[J].中国科学B辑(英文版),2000(03):306-312. |
[13] | Tang X F;Chen L D;Goto T et al.[J].Journal of Materials Research,2001,16:837. |
[14] | Sharp J W;Jones E C;Willams R K et al.[J].Journal of Applied Physics,1995,78:1013. |
[15] | Caillat T.;Borshchevsky A.;Fleurial JP. .BRIDGMAN-SOLUTION CRYSTAL GROWTH AND CHARACTERIZATION OF THE SKUTTERUDITE COMPOUNDS COSB3 AND RHSB3[J].Journal of Crystal Growth,1996(1/4):722-726. |
[16] | Fleurial J P;Caillat T;Borshchevsky A.Proc 16th Inter Conf on Thermoelectrics[J].IEEE Piscataway Nj,1997 |
[17] | 唐新峰,陈立东,後藤 孝,平井 敏雄,袁润章.Fe对CeyFexCo4-xSb12化合物结构和热电传输性质的影响[J].物理学报,2000(12):2437-3442. |
[18] | 唐新峰,陈立东,後藤 孝,平井 敏雄,袁润章.Fe对CeyFexCo4-xSb12化合物结构和热电传输性质的影响[J].物理学报,2000(12):2437-3442. |
[19] | 唐新峰,陈立东,後藤 孝,平井 敏雄,袁润章.Ce填充分数对p型CeyFe1.5Co2.5Sb12化合物热电传输特性的影响[J].物理学报,2000(12):2460-2465. |
[20] | 唐新峰;陈立东;后藤孝 等.[J].物理学报,2001,50:965. |
[21] | 唐新峰,陈立东,後藤 孝,平井 敏雄,袁润章.填充式skutterudite化合物:BayFexCo4-xSb12的多步固相反应合成及结构[J].物理学报,2000(11):2196-2200. |
[22] | 唐新峰,陈立东,後藤孝,平井敏雄,袁润章.n型BayNixCo4-xSb12化合物的热电性能[J].物理学报,2002(12):2823-2828. |
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