Processing Conditions and Aging Effect on the Morphology of PZT Electrospun Nanofibers, and Dielectric Properties of the Resulting 3–3 PZT/Polymer Composite

Lead zirconate titanate (PZT) nanofibers are obtained by electrospinning a sol–gel based solution and polyvinyl pyrrolidone (PVP) polymer, and by subsequent sintering of the electrospun precursor fibers. The average diameter of the precursor PZT/PVP green fibers has increased with the aging of the precursor solution along with an increase in the viscosity. Bead-free uniform green PZT/PVP fibers were collected at about an ∼230 nm average fiber diameter using a 28 wt% PVP ratio solution with a viscosity of 290 mPa. Shrinkage of 40% was recorded on the fiber diameter after sintering. The X-ray diffraction pattern of the annealed PZT fibers exhibits no preferred orientation and a perovskite phase. Preparation of 3–3 nanocomposites by the infusion of polyvinylester into the nanofiber mat facilitates successful handling of the fragile mats and enables measurements of the dielectric properties. The dielectric constant of the PZT/polyvinylester nanocomposite of about 10% fiber volume fraction was found to be fairly stable and vary from 72 to 62 within the measurement range. The dielectric loss of the composite is below 0.08 at low frequencies and reaches a stable value of 0.04 for most of the measured frequencies.

[1]  D. Schüler,et al.  Synthesis and Characterization , 2009 .

[2]  Y. Wang,et al.  Synthesis and characterization of micro/nanoscopic Pb(Zr0.52Ti0.48)O3 fibers by electrospinning , 2004 .

[3]  B. Lee,et al.  Effects of complex doping on microstructural and electrical properties of PZT ceramics , 2006 .

[4]  S. Komarneni,et al.  Sol-gel processing of PbTiO_3 and Pb(Zr_0.52Ti_0.48)O_3 fibers , 1992 .

[5]  E. M. Alkoy,et al.  The effect of crystallographic orientation and solution aging on the electrical properties of sol–gel derived Pb(Zr0.45Ti0.55)O3 thin films , 2007 .

[6]  R. B. Cass,et al.  Fabrication of continuous ceramic fiber by the viscous suspension spinning process , 1991 .

[7]  Jiyan Dai,et al.  Synthesis and piezoresponse of highly ordered Pb(Zr0.53Ti0.47)O3 nanowire arrays , 2004 .

[8]  Ryutaro Maeda,et al.  Piezoelectric Microactuator Devices , 2004 .

[9]  Yong Shi,et al.  Fabrication and mechanical property of nano piezoelectric fibres , 2006 .

[10]  L. E. Cross,et al.  Connectivity and piezoelectric-pyroelectric composites , 1978 .

[11]  W. Sigmund,et al.  Processing and Structure Relationships in Electrospinning of Ceramic Fiber Systems , 2006 .

[12]  E. M. Alkoy,et al.  Microstructure and Crystallographic Orientation Dependence of Electrical Properties in Lead Zirconate Thin Films Prepared by Sol–Gel Process , 2005 .

[13]  P. Ermanni,et al.  Ferroelectric Characterization of Single PZT Fibers , 2009 .

[14]  Mohammed Es-Souni,et al.  Structural and functional properties of screen-printed PZT–PVDF-TrFE composites , 2008 .

[15]  S. Ramakrishna,et al.  Giant strain in PbZr0.2Ti0.8O3 nanowires , 2007 .