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Effect of Barium Titanate Seed Particles on the Sintering and Lattice Parameters in PbMg1/3Nb2/3O3 Ceramics

Published online by Cambridge University Press:  31 January 2011

P. D. Spagnol ,
M. A. Zaghete ,
C. O. Paiva-Santos ,
A. V. C. Andrade ,
A. A. Cavalheiro ,
S. M. Tebcherani  and
J. A. Varela
P. D. Spagnol*
Affiliation:
Chemistry Institute, Physics-Chemistry Department, UNESP PO Box 355, Araraquara (SP), Brazil, 14801-970
M. A. Zaghete
Affiliation:
Chemistry Institute, Physics-Chemistry Department, UNESP PO Box 355, Araraquara (SP), Brazil, 14801-970
C. O. Paiva-Santos
Affiliation:
Chemistry Institute, Physics-Chemistry Department, UNESP PO Box 355, Araraquara (SP), Brazil, 14801-970
A. V. C. Andrade
Affiliation:
Universidade Estadual de Ponta Grossa. Physics Department, Ponta Grossa (PR), Brazil, 84.030-000
A. A. Cavalheiro
Affiliation:
Chemistry Institute, Physics-Chemistry Department, UNESP PO Box 355, Araraquara (SP), Brazil, 14801-970
S. M. Tebcherani
Affiliation:
Universidade Estadual de Ponta Grossa. Chemistry Department, Ponta Grossa (PR), Brazil, 84.030-000
J. A. Varela
Affiliation:
Chemistry Institute, Physics-Chemistry Department, UNESP PO Box 355, Araraquara (SP), Brazil, 14801-970
*
a)Address all correspondence to this author. e-mail: priscilaspagnol@yahoo.com
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Abstract

PbMg1/3Nb2/3O3 (PMN) powder was prepared by citrate organic solution, and barium titanate (BT) seed particles were added to encourage the perovskite phase formation. Sintering was followed using the constant heating rate mode of a dilatometer, and it was observed that the seed concentration affected the PMN shrinkage rate and crystal structure. The study of the lattice parameters of the samples after the sintering process indicates that the diffusion of the titanium and of the barium inside perovskite and pyrochlore PMN phases occurs. Moreover, this substitution provoked a decrease of the lattice parameters as showed by the Rietveld refinement.

Type
Articles
Information
Journal of Materials Research , Volume 17 , Issue 3 , March 2002 , pp. 620 - 624
Copyright
Copyright © Materials Research Society 2002

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