Browsing by Subject "Piezoelectric sensors"

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    Piezoelectric properties of the new generation active matrix hybrid (micro-nano) composites
    (Elsevier B.V., 2014) Parali L.; Şabikoʇlu I.; Kurbanov M.A.
    A hybrid piezoelectric composite structure is obtained by addition of nano-sized BaTiO 3 , SiO 2 to the micro-sized PZT and polymers composition. Although the PZT material itself has excellent piezoelectric properties, PZT-based composite variety is limited. Piezoelectric properties of PZT materials can be varied with an acceptor or a donor added to the material. In addition, varieties of PZT-based sensors can be increased with doping polymers which have physical-mechanical, electrophysical, thermophysical and photoelectrical properties. The active matrix hybrid structure occurs when bringing together the unique piezoelectric properties of micro-sized PZT with electron trapping properties of nano-sized insulators (BaTiO 3 or SiO 2 ), and their piezoelectric, mechanic and electromechanic properties significantly change. In this study, the relationship between the piezoelectric constant and the coupling factor values of microstructure (PZT-PVDF) and the hybrid structure (PZT-PVDF-BaTiO 3 ) composite are compared. The d 33 value and the coupling factor of the hybrid structure have shown an average of 54 and 62% increase according to microstructure composite, respectively. In addition, the d 33 value and the coupling factor of the hybrid structure (PZT-HDPE-SiO 2 ) have exhibited about 68 and 52% increase according to microstructure composite (PZT-HDPE), respectively. © 2013 Elsevier B.V. All rights reserved.