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Polyparaphenylene/LiNi-ferrite nanocomposites are prepared by a novel rheological phase reaction method. The thermoelectric properties of the as-prepared nanocomposites are characterized and the effect of spark plasma sintering (SPS) conditions is investigated. The TEM images show that the size of LiNi-ferrite is around 100300 nm and the polyparaphenylene has diffused boundaries outside it. The negative value of Seebeck coefficient confirms the n-type conduction, and the n-type conduction is attributed to hopping of electrons from Fe2+ to Fe3+ ions. It is found that the electrical conductivity of nanocomposite does not change with sintering time whereas the Seebeck coefficient decreases and thermal conductivity increases with sintering time. Therefore the figure of merit decreases. Because of the high electrical conductivity and low thermal conductivity of organic material and high Seebeck coefficient of inorganic material, the figure of merit of nanocomposites is improved.
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Keywords:
- nanocomposites /
- thermoelectric /
- polyparaphenylene /
- LiNi0.5Fe2O4
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[45] -
[1] Li J B, Li J F 2005 New Energy Materials and Application Technology (Beijing: Tsinghua University Press) p333345 (in Chinese) [李建保, 李敬锋 2005 新能源材料及其应用 第一版 (北京:清华大学出版社) 第333--345页]
[2] [3] Majumdar A 2004 Science 303 777
[4] [5] Pei Y Z, Yang J, Chen L D Zhang W Q, Salvador J R 2009 Appl. Phys. Lett. 95 042101
[6] Tang X F, Chen L D, Goto T, Hirai T, Yuan R Z 2000 Acta Phys. Sin. 49 1120 (in Chinese) [唐新峰, 陈立东, 後藤孝, 平井敏雄, 袁润章 2000 49 1120]
[7] [8] Wang Y Y, Cai K F, Yin J L, An B J, Du Y, Yao X 2011 J. Nanopart. Res. 13 533
[9] [10] [11] Ohtaki M, Maehara S, Shinge S 2003 Proc. 22th Int. Conf. Thermoelectrics (France) 171
[12] [13] Pichanusakorn P, Bandaru P 2010 Materials Science and Engineering R 67 19
[14] Liu H, Wang J Y, Cui H M, Shi R J, Hu X B, Zi Z P 2004 Synth. Met. 145 75
[15] [16] Hostler S R, Kaul P, Day K, Qu V, Cullen C, Abranson A R, Xiao F Q, Burda C 2006 Proceedings of the intersociety conference onthermomechanical phenomena in electric systems p14001405
[17] [18] Pinter E, Fekete Z A, Berkesi O, Makra P, Patzko A, Visy C 2007 J. Phys. Chem. C 111 11872
[19] [20] [21] Yu C, Kim Y S, Kim D, Grunlan J C 2008 Nano Lett. 8 4428
[22] Hilli M F A, Li S, Kassim K S 2009 Materials Science and Engineering B 158 1
[23] [24] [25] Patrakeev M V, Mitberg E B, Lakhtin A A, Leonidov I A, Kozhevnikov V L, Kharton V V, Avdeev M, Marques F M B 2002 Journal of Solid State Chemistry 167 203
[26] Su X L, Tang X F, Li Y 2010 Acta Phys. Sin. 59 2860 (in Chinese)[苏贤礼, 唐新峰, 李涵 2010 59 2860]
[27] [28] Patrakeev, M V, Mitberg, E B, Lakhtin A A, Leonidov I A, Kozhevnikov V L, Kharton V V, Avdeev M, Marques F M B 2002 Journal of Solid State Chemistry 167 203
[29] [30] Chen L D, Xiong Z, Bai S Q 2010 Journal of Inorganic Materials 25 561 (in Chinese) [陈立东, 熊震, 柏胜强 2010 无机材料学报 25 561]
[31] [32] Zhang B, Sun J, Katz H E, Fang F, Opila R L 2010 ACS Applied Materials Interfaces 2 3170
[33] [34] Heremans J P, Jovovic V, Toberer E S, Saramat A, Kurosaki K, Charoenphakdee A, Yamanaka S, Snyder G J 2008 Science 321 554
[35] [36] [37] Mahan G D, Sofo J O 1996 Proc. Natl. Acad. Sci. 93 7436
[38] [39] Malen J A, Yee S K, Majumdar A, Segalman R A 2010 Chem.Phys. Lett. 491 109
[40] [41] Jiang J, Li Y L, Xu G J, Cui P, Wu T, Chen L D, Wang G 2007 Acta Phys. Sin. 56 2858 (in Chinese) [蒋俊, 李亚丽, 许高杰, 崔平, 吴汀, 陈立东, 王刚 2007 56 2858]
[42] Liu X J 2007 Mater. Rev. 2 27 (in Chinese) [刘显杰 2007 材料导报网刊 2 27]
[43] [44] Kharabe R G, Devan R S, Chougale B K 2008 Journal of Alloysand Compounds 463 67
[45]
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