Abstract
Orthorhombic polycrystalline Ca2Si sintered compact bulk crystals were synthesized via a two-step treatment, and the experimental evaluation of the electrical and thermoelectric properties of Ca2Si is reported for the first time. First, single-phase Ca2Si powders were synthesized by the heat treatment of Mg2Si powders under a Ca vapor. Then Ca2Si sintered compacts were synthesized by the spark plasma sintering technique using the Ca2Si powders. It was found that single-phase Ca2Si sintered compacts were obtained when the sintering was carried out at temperatures lower than 673 K with high pressure of 300 MPa. The structural, electrical and thermoelectric properties of the Ca-silicide sintered compacts and their dependence on process conditions are discussed.
References
[1] T.Dasgupta, A.M.Umarji: J. Alloys Comp.461 (2008) 292.Search in Google Scholar
[2] Q.R.Hou, Z.M.Wang, Y.J.He: Appl. Phys. A80 (2005) 1807.Search in Google Scholar
[3] S.W.Kim, M.K.Cho, Y.Mishima, D.C.Choi: Intermetallics11 (2003) 399.Search in Google Scholar
[4] M.Akasaka, T.Iida, K.Nishio, Y.Takanashi: Thin Solid Films515 (2007) 8237.Search in Google Scholar
[5] J.Tani, H.Kido: J. Alloys Comp.466 (2008) 335.Search in Google Scholar
[6] Y.Imai, A.Watanabe, M.Mukaida: J. Alloys Comp.358 (2003) 257.Search in Google Scholar
[7] D.B.Migas, L.Miglio, V.L.Shaposhnikov, V.E.Borisenko: Phys. Rev. B67 (2003) 2052031.Search in Google Scholar
[8] L.I.Ivanenko, V.L.Shaposhnikov, A.B.Filonov, A.V.Krivosheeva, V.E.Borisenko, D.B.Migas, L.Miglio, G.Behr: Thin Solid Films461 (2004) 141.Search in Google Scholar
[9] Y.Warashina, Y.Ito, T.Nakamura, H.Tatsuoka, J.Snyder, M.Tanaka, T.Suemasu, Y.Anma, M.Shimomura, Y.Hayakawa: e-J. Surf. Sci. Nanotech.7 (2009) 129.Search in Google Scholar
[10] Y.Imamura, H.Muta, K.Kurosaki, S.Yamanaka, in: C. Uher, Y. Grin, Ballreich, Sugiwara, G. Pastorino, M. Cauchy, M. Udagawa (Eds.), 25th International Conference on Thermoelectrics (2006) 535.Search in Google Scholar
[11] H.Matsui, M.Kuramoto, T.Ono, H.Nose, H.Tatsuoka, H.Kuwabara: J. Cryst. Growth237/239 (2002) 2121.Search in Google Scholar
[12] Y.Mizuyoshi, R.Yamada, T.Ohishi, Y.Saito, T.Koyama, Y.Hayakawa, T.Matsuyama, H.Tatsuoka: Thin Solid Films508 (2006) 70.Search in Google Scholar
[13] T.Hosono, M.Kuramoto, Y.Matsuzawa, Y.Momose, Y.Maeda, T.Matsuyama, H.Tatsuoka, Y.Fukuda, S.Hashimoto, H.Kuwabara: Appl. Surf. Sci.216 (2003) 620.Search in Google Scholar
[14] N.Takagi, Y.Sato, T.Matsuyama, H.Tatsuoka, M.Tanaka, F.Chu, H.Kuwabara: Appl. Surf. Sci.244 (2005) 330.Search in Google Scholar
[15] H.W.Zhang, R.Gopalan, T.Mukai, K.Hono: Scripta Mater.53 (2005) 863.Search in Google Scholar
[16] X.L.Shi, G.Q.Shao, X.L.Duan, R.Zh.Yuan, H.H.Lin: Mater. Sci. Eng. A392 (2005) 335.Search in Google Scholar
[17] O.Mamoru: Mater. Sci. Eng. A287 (2000) 183.Search in Google Scholar
[18] R.Nakamura, K.Fujita, Y.Iijima, M.Okada: Acta Mater.51 (2003) 3861.Search in Google Scholar
[19] D.Subramanyam, M.R.Notis, J.I.Goldstein: Metal. Trans. A16 (1985) 605.Search in Google Scholar
[20] K.N.Tu, G.Ottaviani, R.D.Thompson, J.W.Mayer: J. Appl. Phys.53 (1982) 4406.Search in Google Scholar
[21] S.Lebègue, B.Arnaud, M.Alouani, P.E.Bloechl: Phys. Rev. B67 (2003) 155208.Search in Google Scholar
[22] J.Hu, A.Kato, T.Sadoh, Y.Maeda, K.Galkin, T.Turchin, H.Tatsuoka: to be published in Int. J. Mod. Phys. B, 2010.Search in Google Scholar
[23] T.Inaba, A.Kato, K.Miura, M.Akasaka, T.Iida, Y.Momose, H.Tatsuoka: Thin Solid Films515 (2007) 8226.Search in Google Scholar
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