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Título: | Effect of stoichiometry and milling processes in the synthesis and the piezoelectric properties of KNN-modified nanoparticles by solid state |
Autor: | Rubio Marcos, Fernando CSIC ORCID; Romero Fanego, Juan José CSIC ORCID; Martín-González, Marisol CSIC ORCID ; Fernández Lozano, José Francisco CSIC ORCID | Palabras clave: | Powders-solid state reaction Microstructure-prefiring Piezoelectric properties Perovskites |
Fecha de publicación: | 30-jun-2010 | Editor: | Elsevier | Citación: | Journal of the European Ceramic Society 30(13): 2763-2771 (2010) | Resumen: | Nanoparticles in the system (K,Na,Li)(Nb,Ta,Sb)O3, modified KNN, were synthesized following a solid state reaction procedure. Milling of the individual carbonate and oxide raw materials was carried out before mixing of the components to optimize particle size. These mixtures were calcined at 700 ◦C for 2 h, obtaining nanoparticles with size ranging between 50 and 200 nm. The optimization of the raw materials particle size and the particle refinement of the carbonates during their decomposition play a key role in the formation of the modified KNN nanoparticles by solid state route. The obtained nanoparticles show tetragonal and orthorhombic phases coexistence that could be attributed in part to the lack of homogeneity of cations distribution confirmed by EDS analysis. The K+ cation excess on the modified KNN system produces a displacement of Li+ cations from the perovskite structure that is the origin of the stabilization of the orthorhombic symmetry. These nanoparticles are used to sintered ceramics with good piezoelectric properties without needing of anisotropic preparation methods. The sintered ceramics show resistance to hygroscopicity and deliquescence. | Descripción: | 9 páginas, 10 figuras, 2 tablas. | Versión del editor: | http://dx.doi.org/10.1016/j.jeurceramsoc.2010.05.027 | URI: | http://hdl.handle.net/10261/30042 | DOI: | 10.1016/j.jeurceramsoc.2010.05.027 | ISSN: | 0955-2219 |
Aparece en las colecciones: | (IMN-CNM) Artículos |
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Rubio-Marcos, F. et al J. Eur. Ceram. Soc._30_2010.pdf | 792,6 kB | Adobe PDF | Visualizar/Abrir |
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