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    Por favor, use este identificador para citar o enlazar este ítem: http://hdl.handle.net/10259/5056

    Título
    Local Piezoelectric Behavior of Potassium Sodium Niobate Prepared by a Facile Synthesis via Water Soluble Precursors
    Autor
    Senes, Nina .
    Iacomini, Antonio .
    Domingo, Neus .
    Enzo, Stefano
    Mulas, Gabriele
    Cuesta López, SantiagoAutoridad UBU Orcid
    Garroni, SebastianoAutoridad UBU Orcid
    Publicado en
    Physica status solidi (a). 2018, V. 215, n. 16, 1700921
    Editorial
    Wiley
    Fecha de publicación
    2018-08
    ISSN
    1862-6300
    DOI
    10.1002/pssa.201700921
    Resumen
    Due to the ever‐increasing restrictions connected to the use of toxic lead‐based materials, the developing of lead‐free piezoceramics has become one of the most urgent tasks. In this context, potassium sodium niobate materials (KNN) have attracted a lot of interest as promising candidates due to their excellent piezo properties. For this reason, many efforts have been addressed to optimize the synthesis process now suffering by several drawbacks including the high volatilization of potassium and sodium at the conventional high temperature treatments and the use of expensive metal precursors. To overcome these issues, a new modified Pechini method to synthesize single phase K0.5Na0.5NbO3 powders, from water soluble metal precursors, is presented. Microstructural and structural parameters are characterized by X‐ray diffraction (XRD). Depending on the amount of citric acid added to the starting reagents, two pure single‐phase K0.5Na0.5NbO3 (2 g citric acid) and K0.3Na0.7NbO3 (0.2 g citric acid), respectively, are obtained with a good crystallinity at a moderate temperature of 500 °C. The piezo responses of the as calcined systems are tested by piezoresponse force microscopy (PFM). K0.5Na0.5NbO3 exhibits a much higher response with respect to the other phase, which relates to the larger crystallinity and to the chemical composition.
    Palabras clave
    modified‐pechini method
    ead-free piezoceramics
    piezoresponse forcemicroscop
    potassium sodium niobate
    X-ray diffraction
    Materia
    Física
    Physics
    URI
    http://hdl.handle.net/10259/5056
    Versión del editor
    https://doi.org/10.1002/pssa.201700921
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    • Artículos ICCRAM
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    Nombre:
    PSSA-JOURNAL-S-17-01090.pdf
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