Processing, microstructure and electromechanical properties of Pb(Zr, Ti)O<inf>3</inf> fibers obtained by thermoplastic co-extrusion

Abstract

Using a torque-rheometer, ceramicpolymer extrudable mixtures were prepared to produce lead zirconate titanate (PZT) fibers through a coextrusion process. A 7.7 mm diameter PZT-polymer rod was coupled with a 24 mm diameter carbon blackpolymer shaped cylinder. This so called preform composite was extruded through a 1 mm die. By this method, 300 μm PZT fiber structures were successfully achieved. The microstructure and the electromechanical properties of these co-extruded sintered fibers were investigated and compared to 300 μm diameter fibers produced by simple thermoplastic extrusion. Although the co-extruded fibers showed similar microstructure properties and only a slightly higher porosity than the extruded ones, the electromechanical performance was noticeably inferior.

Small and large signal ferroelectric properties of single lead zirconium titanate fibers

“…In this region, the reflection peaks of the two phases overlap to some degrees, but it is possible to distinguish the tetragonal (002) T and (200) T peaks form the rhombohedral (200) R peak, shown by the raw powder. By sintering, an evolution toward a more tetragonal phase is observed, but by increasing the temperature, no significant change in composition can be observed: tetragonal phase is the main phase present in the extruded fibers, which is in good agreement with what has been reported by Ismael et al (2009).…”