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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
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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

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