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The Ba and Ag co-doped BaxAgyCa2.8Co4O9 thermoelectric bulk materials are fabricated by acid sol-gel and spark plasma sintering method. The phase compositions, microstructures and thermal transport properties of the resulting bulk materials are analyzed by X-ray diffraction, scanning electron microscopy and the thermal transport constant measurement apparatus. The results show that the thermal conduction behavior for the titled system can be effectively tuned by Ba and Ag co-doping, and the thermal conductivity could be reduced by increasing the Ba doping content. The analysis results show that the total thermal conduction suppressing comes from the lattice thermal conduction confinement. The Ba0.1Ag0.1Ca2.8Co4O9 bulk material is found to have the lowest thermal conductivity with total thermal conductivity and lattice thermal conductivity reaching 1.43 W/mK and 1.10 W/mK at 973 K, respectively.
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Keywords:
- Ca3Co4O9 /
- double substitution /
- thermal conductivity
[1] Terasaki I, Sasago Y, Uchinokura K 1997 Phys. Rev. B 56 12685
[2] Shikano M, Funahashi R 2003 Appl. Phys. Lett. 82 1581
[3] Fergus J F 2012 J. Euro. Ceram. Soc. 32 525
[4] Zhang F P, Zhang X, Lu Q M, Zhang J X, Liu Y Q 2011 J. Alloys Compd. 509 4171
[5] Lu Q M, Zhang J X, Zhang Q Y, Liu Y Q, Liu D M 2006 25th International Conference on Thermoelectrics 2006 (New Jersey: IEEE Piscateway) p66
[6] Masset A C, Michel C, Maignan A, Hervieu M, Toulemonde O, Studer F, Raveau B 2000 Phys. Rev. B 62 166
[7] Zhang F P, Zhang X, Lu Q M, Zhang J X, Liu Y Q, Zhang G Z 2011 Solid State Sci. 13 1443
[8] Zhang X, Ma X Y, Zhang F P, Wu P X, Lu Q M, Liu Y Q, Zhang J X 2012 Acta Phys. Sin. 61 047201 (in Chinese) [张忻, 马旭颐, 张飞鹏, 武鹏旭, 路清梅, 刘燕琴, 张久兴 2012 物理学报 61 047201]
[9] Li J C, Wang C L, Wang M X, Peng H, Zhang R Z, Zhao M L, Liu J, Zhang J L, Mei L M 2009 J. Appl. Phys. 105 043503
[10] Shi X, Hong H, Li C P, Uher C, Yang J, Salvador J R, Wang H, Chen L, Zhang W 2008 Appl. Phys. Lett. 92 182101
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[1] Terasaki I, Sasago Y, Uchinokura K 1997 Phys. Rev. B 56 12685
[2] Shikano M, Funahashi R 2003 Appl. Phys. Lett. 82 1581
[3] Fergus J F 2012 J. Euro. Ceram. Soc. 32 525
[4] Zhang F P, Zhang X, Lu Q M, Zhang J X, Liu Y Q 2011 J. Alloys Compd. 509 4171
[5] Lu Q M, Zhang J X, Zhang Q Y, Liu Y Q, Liu D M 2006 25th International Conference on Thermoelectrics 2006 (New Jersey: IEEE Piscateway) p66
[6] Masset A C, Michel C, Maignan A, Hervieu M, Toulemonde O, Studer F, Raveau B 2000 Phys. Rev. B 62 166
[7] Zhang F P, Zhang X, Lu Q M, Zhang J X, Liu Y Q, Zhang G Z 2011 Solid State Sci. 13 1443
[8] Zhang X, Ma X Y, Zhang F P, Wu P X, Lu Q M, Liu Y Q, Zhang J X 2012 Acta Phys. Sin. 61 047201 (in Chinese) [张忻, 马旭颐, 张飞鹏, 武鹏旭, 路清梅, 刘燕琴, 张久兴 2012 物理学报 61 047201]
[9] Li J C, Wang C L, Wang M X, Peng H, Zhang R Z, Zhao M L, Liu J, Zhang J L, Mei L M 2009 J. Appl. Phys. 105 043503
[10] Shi X, Hong H, Li C P, Uher C, Yang J, Salvador J R, Wang H, Chen L, Zhang W 2008 Appl. Phys. Lett. 92 182101
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