Hostname: page-component-848d4c4894-2xdlg Total loading time: 0 Render date: 2024-06-20T01:44:15.707Z Has data issue: false hasContentIssue false
  • English
  • Français

Synthesis of Na1-xLnxNbO3 (Ln=La, Nd, Sm, Gd) and their Structures and Electrical Properties

Published online by Cambridge University Press:  16 February 2011

Wataru Sugimoto ,
Masahiro Naito ,
Yoshiyuki Sugahara  and
Kazuyuki Kuroda
Wataru Sugimoto
Affiliation:
Department of Applied Chemistry, School of Science and Engineering, Waseda University, Ohkubo-3, Shinjuku-ku, Tokyo 169-8555, JAPAN
Masahiro Naito
Affiliation:
Department of Applied Chemistry, School of Science and Engineering, Waseda University, Ohkubo-3, Shinjuku-ku, Tokyo 169-8555, JAPAN
Yoshiyuki Sugahara
Affiliation:
Department of Applied Chemistry, School of Science and Engineering, Waseda University, Ohkubo-3, Shinjuku-ku, Tokyo 169-8555, JAPAN
Kazuyuki Kuroda
Affiliation:
Department of Applied Chemistry, School of Science and Engineering, Waseda University, Ohkubo-3, Shinjuku-ku, Tokyo 169-8555, JAPAN Kagami Memorial Laboratory for Materials Science and Technology, Waseda University, Nishiwaseda-2, Shirnjuku-ku, Tokyo 169-0051, JAPAN
Get access

Abstract

Polycrystalline samples of Na1-xLnxNbO3 (Ln=La, Nd, Sm, Gd) were synthesized by solid-state reactions. Reduced niobates were obtained as single-phase perovskites for x=0.05 and 0.1 when Ln=La and Nd and x=0.05 when Ln=Sm. The Gd-substituted samples could not be prepared under the synthetic conditions studied. Compositional analysis of the products revealed a slight amount of sodium loss during synthesis. The structural parameters obtained from Rietveld analysis revealed an increase in unit-cell volume. All of the obtained samples showed semiconducting behavior. Similar semiconducting behavior was observed for the same x value, suggesting the weak influence of the different Ln species to the electrical properties.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 547: Symposium DD – Solid-State Chemistry of Inorganic Materials II , 1998 , 267
Copyright
Copyright © Materials Research Society 1999

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1. Goodenough, J.B., Prog. Solid State Chem., 5, 145 (1972).Google Scholar
2. Cox, P.A., Transition Metal Oxides, Clarendon Press, Oxford, 1992.Google Scholar
3. Rao, C.N.R. and Raveau, B., Transition Metal Oxides, VCH, 1995.Google Scholar
4. Ridgley, D. and Ward, R., J. Am. Ceram. Soc., 77, 6132 (1955).Google Scholar
5. Hessen, B., Sunshine, S.A., Siegrist, T. and Jimenez, R., Mater. Res. Bull., 26, 85 (1991).Google Scholar
6. Isawa, K., Sugiyama, J., Matsuura, K., Nozaki, A. and Yamauchi, H., Phys. Rev. B, 47, 2849 (1993).Google Scholar
7. Kreiser, R.R. and Ward, R., J. Solid State Chem., 1, 368 (1970).Google Scholar
8. Casais, M.T., Alonso, J.A., Rasines, I. and Hidalgo, M.A., Mater. Res. Bull., 30, 201 (1995).Google Scholar
9. Ellis, B., Doumerc, J., Dordor, P., Pouchard, M. and Hagenmuller, P., Solid State Commun., 51, 913 (1984).Google Scholar
10. Kopnin, E.M., Istomin, S.Ya., D'yachenko, O.G., Antipov, E.V., Bordet, P., Capponi, J.J., Chaillout, C., Marezio, M., Brion, S.de, and Souletie, B., Mater. Res. Bull., 30, 1379 (1995).Google Scholar
11. Abakumov, A.M., Shpanchenko, R.V. and Antipoc, E.V., Mater. Res. Bull., 30, 97 (1995).Google Scholar
12. Sugimoto, W., Tahara, T., Sugahara, Y. and Kuroda, K., in Solid State Chemistry of'lnorganic Materials, edited by Jacobson, A., Davies, P., Vanderah, T. and Torardi, C. (Mater. Res. Soc. Proc. 453, Boston, MA 1997), p. 361–366.Google Scholar
13. For example; (a) Maclean, D.A., Ng, H.-K. and Greedan, J.E., J. Solid State Chem., 30, 35 (1979);Google Scholar
(b) Greedan, J.E., J. Less-Common Metals, 111, 335 (1985);Google Scholar
(c) Crandles, D.A., Timusk, T., Garret, J.D. and Greedan, J.E., Physica C, 201, 407 (1992).Google Scholar
14. Izumi, F., in The Rietveld Method, edited by Young, R.A., (Oxford University Press, Oxford 1993), p. 236–253.Google Scholar
15. Kim, Y.I. and Izumi, F., J. Ceram. Soc. Jpn. 102, 401 (1994).Google Scholar
16. Shannon, R.D., Acta Cryst., A32, 751 (1976).Google Scholar
17. Sakowski-Cowlcy, A.C.. Lukaszcwicz, K. and Megaw, H., Acta. Cryst., 1325, 851 (1969).Google Scholar
18. Ishikawa, K., Adachi, G. and Shiokawa, J., Bull. Chem. Soc. Jpn., 55, 3317 (1982).Google Scholar
19. Hamada, D., Sugimoto, W., Sugahara, Y. and Kuroda, K., J. Ceram. Soc. Jpn, 105, 284 (1997).Google Scholar