Preparation of pyrochlore-free PMN by an alternative chemical method
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Data
2006-01-01
Autores
Guarany, C. A.
Reis, R. N.
Araujo, E. B.
Menezes, C. T.
Souza Filho, A. G.
Sasaki, J. M.
Mendes Filho, J.
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Editor
Taylor & Francis Ltd
Resumo
This work reports the synthesis of the MgNb(2)O(6) and the ferroelectric lead magnesium niobate Pb(Mg(1/3)Nb(2/3))O(3) (PMN) using fine precursor powders obtained from a chemical Oxide Precursor Method (OPM). To obtain pyrochlore-free PMN ceramics, the synthesis of the precursor MgNb(2)O(6) powders was studied for 2-25 mol% excess of MgO and 10 mol% excess of PbO. Structural and microstructural properties of the sintered ceramics obtained by the cited method and by the classical columbite method were studied and compared. Results lead to good quality, pyrochlore-free PMN ceramic prepared by OPM, presenting greater grain size if compared with ceramic prepared by columbite method.
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Palavras-chave
PMN, ceramics, structural properties
Como citar
Ferroelectrics. Abingdon: Taylor & Francis Ltd, v. 334, p. 147-155, 2006.