Formation and electrical conductivity of air-sinterable Nd(Cr sub(1 - x)Mg sub(x ))O sub(3)

In Mg super(2+)-substituted NdCrO sub(3), single-phase perovskite compounds Nd(Cr sub(1 - x)Mg sub(x))O sub(3), where x=0 to 0.25, have been formed at low temperatures by decomposition of Nd(Cr sub(1 - x)Mg sub(x))O sub(4), which crystallize from amorphous materials prepared by the hydrazine method....

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Published inSolid state ionics Vol. 149; no. 1-2; pp. 107 - 113
Main Authors Kunifusa, Yoshiyuki, Yoshinaka, Masaru, Hirota, Ken, Yamaguchi, Osamu
Format Journal Article
LanguageEnglish
Published 01.07.2002
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Summary:In Mg super(2+)-substituted NdCrO sub(3), single-phase perovskite compounds Nd(Cr sub(1 - x)Mg sub(x))O sub(3), where x=0 to 0.25, have been formed at low temperatures by decomposition of Nd(Cr sub(1 - x)Mg sub(x))O sub(4), which crystallize from amorphous materials prepared by the hydrazine method. Nd(Cr sub(1 - x)Mg sub(x))O sub(3) powders consisting of submicrometer-size particles are highly sinterable; dense materials can be fabricated by sintering for 4 h at 1800 degree C under atmospheric pressure. The relative densities, grain sizes, and electrical conductivities increase with increased Mg super(2+) content. Nd(Cr sub(0.75)Mg sub(0.25))O sub(3) materials show an excellent electrical conductivity of 1.4 x 10 super(3) S m super(-1) at 1000 degree C. copyright 2002 Published by Elsevier Science B.V.
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ISSN:0167-2738