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Thermal expansion and sintering studies of Nd2-xCexCuO4±δ (0 ≤ x ≤ 0.20)

Published online by Cambridge University Press:  01 May 2006

M. Soorie  and
S.J. Skinner
M. Soorie
Affiliation:
Department of Materials, Imperial College London, London SW7 2BP, United Kingdom
S.J. Skinner*
Affiliation:
Department of Materials, Imperial College London, London SW7 2BP, United Kingdom
*
a) Address all correspondence to this author. e-mail: [email protected]
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Abstract

Sintering behavior and thermal expansion properties of the solid solution series Nd2-xCexCuO4±δ (0 ≤ x ≤ 0.20) have been investigated over the temperature range of 298 to 1100 K. Significant anisotropy in the lattice expansion coefficient in the a/b and c crystallographic axes was noted on increasing Ce content, which is consistent with the tetragonal unit cell. The lattice expansion in the c axis was found to decrease on increasing temperature for compositions up to x = 0.10, which is likely to be from variations in the oxygen stoichiometry. A variation in the sintering behavior was also noted on varying Ce content, with the onset of sintering temperature reaching a maximum at x = 0.10. A secondary sintering stage was noted for compositions with x > 0.10. Associated with the introduction of a secondary stage on sintering is an overall increase in the temperature at which the sintering is at a maximum.

Keywords

LanthanideNdX-ray diffraction (XRD)
Type
Articles
Information
Journal of Materials Research , Volume 21 , Issue 5 , May 2006 , pp. 1248 - 1254
Copyright
Copyright © Materials Research Society 2006

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