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Synthesis of A1–xA'xNbO3 (A=Na+, K+; A'= La3+, Sr2+) and its Electrical Properties

Published online by Cambridge University Press:  15 February 2011

W. Sugimoto ,
T. Tahara ,
Y. Sugahara  and
K. Kuroda
W. Sugimoto
Affiliation:
Department of Applied Chemistry, Waseda University, Ohkubo 3, Shinjuku-ku, Tokyo 169, Japan
T. Tahara
Affiliation:
Department of Applied Chemistry, Waseda University, Ohkubo 3, Shinjuku-ku, Tokyo 169, Japan
Y. Sugahara
Affiliation:
Department of Applied Chemistry, Waseda University, Ohkubo 3, Shinjuku-ku, Tokyo 169, Japan
K. Kuroda
Affiliation:
Department of Applied Chemistry, Waseda University, Ohkubo 3, Shinjuku-ku, Tokyo 169, Japan
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Abstract

Polycrystalline samples of A1–xA'xNbO3 (A=Na+, K+; A'= La3+, Sr2+) were prepared by solid-state reactions and the relationship between the structure and electrical properties was examined. Single-phase products were obtained for Na1–xLaxNbO3 (x ≤0.1), K1–xLaxNbO3 (x ≤0.15), Na1–xSrxNbO3 (x ≤0.3), and K1–xSrxNbO3 (x ≤0.5). The structures of the sodium-containing compounds and potassium-containing compounds were indexed according to a pseudocubic and cubic symmetry, respectively. The resistivity measurements showed semiconductive behavior for the lanthanum-containing samples. The strontium-containing samples showed semiconducting properties for x ≤0.2, while a transition to metallic conduction at low temperature was observed for x >0.2.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 453: Symposium R – Solid State Chemistry of Inorganic Materials , 1996 , 361
Copyright
Copyright © Materials Research Society 1997

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