Grain size effect on the structural and dielectric properties of Pb0.85La0.15TiO3 ferroelectric ceramic compound
| Contribuinte(s) |
UNIVERSIDADE DE SÃO PAULO |
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| Data(s) |
16/09/2013
16/09/2013
2012
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| Resumo |
This paper presents a study of the influence of particle size on the structural and dielectric properties of Pb0.85La0.15TiO3 (PLT15) ferroelectric ceramic samples. The samples were prepared with average grain size of 1.69 +/- 0.08 mu m and 146 +/- 8 nm using, respectively, conventional and spark plasma sintering techniques. A decrease in the tetragonality degree as the crystallite size decreased was explained by an internal stress caused by the existence of a large amount of grain boundaries. The local structure exhibited no significant modification and the dielectric measurements showed a diffuse phase transition and a reduction in the permittivity magnitude at T-m as the average grain size decreased. The nanostructured ceramic sample prepared at a relatively lower temperature and sintering time presented a dielectric constant value of approximately 2000 at room temperature. (c) 2012 Elsevier Ltd and Techna Group S.r.l. All rights reserved. FAPESP FAPESP CNPq CNPq |
| Identificador |
CERAMICS INTERNATIONAL, OXFORD, v. 38, n. 7, supl. 4, Part 1-2, pp. 5879-5887, SEP, 2012 0272-8842 http://www.producao.usp.br/handle/BDPI/33375 10.1016/j.ceramint.2012.04.039 |
| Idioma(s) |
eng |
| Publicador |
ELSEVIER SCI LTD OXFORD |
| Relação |
CERAMICS INTERNATIONAL |
| Direitos |
closedAccess Copyright ELSEVIER SCI LTD |
| Palavras-Chave | #GRAIN SIZE #FERROELECTRICS #PLT #SPARK PLASMA #RAMAN #XANES #X-RAY-DIFFRACTION #PHASE-TRANSITION #TITANATE CERAMICS #ABSORPTION SPECTROSCOPY #SOLID-SOLUTIONS #FINE-STRUCTURE #THIN-FILMS #DISORDER #PBTIO3 #TEMPERATURE #MATERIALS SCIENCE, CERAMICS |
| Tipo |
article original article publishedVersion |
