Structural characterization of 0.5PbMg(1/3)Nb(2/3)O(3)-0.5Ba(x)Pb((1-x))TiO(3) powders


Autoria(s): Bruno, J. C.; Boni, T. C.; Cavalheiro, A. A.; Zaghete, M. A.
Contribuinte(s)

Universidade Estadual Paulista (UNESP)

Data(s)

20/05/2014

20/05/2014

05/02/2008

Resumo

The present work reports the effects caused by barium on phase formation, morphology and sintering of lead magnesium niobate-lead titanate (PMN-50PT). Ab initio study of 0.5PbMg(1/3)Nb(2/3)O(3)-0.5Ba(x)Pb((1-x))TiO(3) ceramic powders, with x = 0, 0.20, and 0.40 was proposed, considering that the partial substitution of lead by barium can reestablish the equilibrium of monoclinic-tetragonal phases in the system. It was verified that even for 40 mol% of barium, it was possible to obtain pyrochlore-free PMN-PT powders. The increase of the lattice parameters of PMN-PT doped-powders confirmed dopant incorporation into the perovskite phase. The presence of barium improved the reactivity of the powders, with an average particle size of 120 nm for 40 mol% of barium against 167 mn for the pure sample. Although high barium content (40 mol%) was deleterious for a dense ceramic, contents up to 20 mol% allowed 95% density when sintered at 1100 degrees C for 4 h. (c) 2007 Elsevier Ltd. All rights reserved.

Formato

297-304

Identificador

http://dx.doi.org/10.1016/j.materresbull.2007.03.010

Materials Research Bulletin. Oxford: Pergamon-Elsevier B.V. Ltd, v. 43, n. 2, p. 297-304, 2008.

0025-5408

http://hdl.handle.net/11449/19157

10.1016/j.materresbull.2007.03.010

WOS:000252579800013

Idioma(s)

eng

Publicador

Pergamon-Elsevier B.V. Ltd

Relação

Materials Research Bulletin

Direitos

closedAccess

Palavras-Chave #ceramics #X-ray diffraction #phase equilibria
Tipo

info:eu-repo/semantics/article