http://www.cnr.it/ontology/cnr/individuo/prodotto/ID197657
Mapping local defects in PbO-based piezoceramics (Articolo in rivista)
- Type
- Label
- Mapping local defects in PbO-based piezoceramics (Articolo in rivista) (literal)
- Anno
- 2011-01-01T00:00:00+01:00 (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#doi
- 10.1016/j.jcrysgro.2010.11.029 (literal)
- Alternative label
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#autori
- E. Dimitriu (a,b); R. Ramer (c); F. Craciun (d) (literal)
- Pagina inizio
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- http://www.sciencedirect.com/science/article/pii/S0022024810010092 (literal)
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- Rivista
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- Note
- ISI Web of Science (WOS) (literal)
- Http://www.cnr.it/ontology/cnr/pubblicazioni.owl#affiliazioni
- a) REGO COM SRL, Calea 13 Septembrie 115, Bucharest-5, Romania
b) Interdisciplinary Research Institute for Micro and Nanostructures, University \"Ovidius\", Constanta, Romania
c) The School of Electrical Engineering and Telecommunication, The University of South Wales, Sydney 2052, Australia
d) CNR, Istituto dei Sistemi Complessi, Area della Ricerca di Roma--Tor Vergata, Via del Fosso del Cavaliere 100, I-00133 Rome, Italy (literal)
- Titolo
- Mapping local defects in PbO-based piezoceramics (literal)
- Abstract
- The effect of impurities and defects of various types on the properties of ferroelectric perovskites remains a subject of great interest and is investigated by increasingly sophisticated experimental techniques. The microscopic structure and defect chemistry of ferroelectric lead titanate ceramics with complex compositions (doped with Mn, Pr, Nd and Gd) prepared by standard solid-state oxide method were investigated in this study.
Phase formation and microstructure were examined by XRD and SEM, respectively. Grains with unusual shapes and sizes are observed in a homogeneous matrix. Agglomerations of chemical components randomly distributed in the samples are revealed using the energy dispersive X-ray analysis with the microprobe technique and the elemental distribution within bulk ceramics is profiled. At least two oxidation states of the titanium and manganese ions are evidenced from optical reflection spectra. All observed local defects in the ferroelectric ceramic depended on the composition, the sintering temperature and the annealing conditions, and affected the conductivity and the dielectric and piezoelectric properties. (literal)
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