期刊
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
卷 31, 期 15, 页码 2965-2973出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.jeurceramsoc.2011.07.013
关键词
Ferroelectric properties; Magnetic properties; High-energy ball milling
资金
- CNPq [476964/2009-1, 552900/2009-5]
- Fundacao Araucaria de Apoio ao Desenvolvimento Cientifico e Tecnologico do Parana [10779, 15727]
- CAPES [082/2007]
- FAPESP [2008/04025-0]
In this study, (1-x)BiFeO3-(x)PbTiO3 multiferroic ceramics, with x = 0, 0.1, 0.2, 0.25, 0.3 and 0.4, were processed through high-energy ball milling followed by reactive sintering in air atmosphere. The optimization of the procedure for the preparation of highly-dense (1-x)BiFeO3-(x)PbTiO3 ceramics was carefully investigated and structural/microstructural effects on ferroic properties were carefully addressed. Shrinkage dilatometric measurements revealed an expansion related to a sintering reaction that has occurred before densification. This sintering behaviour was highly PbTiO3 concentration-dependent. The sintering mechanism was found to be directly related with the aliovalent substitution of Pb and Ti ions on A and B sites of the perovskite structure. The obtained ceramics were confirmed as ferroelectric ordered in ferroelectric characterizations. Remnant polarizations and coercive fields greatly dependent on grain size distribution and aliovalent substitutions were revealed. The magnetic hysteresis displayed a weak-ferromagnetic behaviour in all studied samples. (C) 2011 Elsevier Ltd. All rights reserved.
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