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

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

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Bibliographic Details
Published inSolid state ionics Vol. 149; no. 1; pp. 107 - 113
Main Authors Kunifusa, Yoshiyuki, Yoshinaka, Masaru, Hirota, Ken, Yamaguchi, Osamu
Format Journal Article
LanguageEnglish
Published Elsevier B.V 01.07.2002
Subjects
Electrical conductivity
Hydrazine method
Magnesium oxide
Neodymium chromium oxide
Perovskite materials
81.20.E
Perovskite materials
Electrical conductivity
Magnesium oxide
Hydrazine method
Neodymium chromium oxide
81.05.J
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Summary:In Mg 2+-substituted NdCrO 3, single-phase perovskite compounds Nd(Cr 1− x Mg x )O 3, where x=0 to 0.25, have been formed at low temperatures by decomposition of Nd(Cr 1− x Mg x )O 4, which crystallize from amorphous materials prepared by the hydrazine method. Nd(Cr 1− x Mg x )O 3 powders consisting of submicrometer-size particles are highly sinterable; dense materials can be fabricated by sintering for 4 h at 1800 °C under atmospheric pressure. The relative densities, grain sizes, and electrical conductivities increase with increased Mg 2+ content. Nd(Cr 0.75Mg 0.25)O 3 materials show an excellent electrical conductivity of 1.4×10 3 S m −1 at 1000 °C.
ISSN:0167-2738
1872-7689
DOI:10.1016/S0167-2738(02)00112-1