Deformation Control During Thermal Treatment of Electrospun PbZr0.52Ti0.48O3 Nanofiber Mats |
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| Authors: | Ofer Rozent Vadim V. Beilin Gennady E. Shter Gideon S. Grader |
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| Affiliation: | 1. Technion, The Nancy and Stephen Grand Technion Energy Program, Haifa, Israel;2. Technion, Chemical Engineering Department, Haifa, Israel |
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| Abstract: | This paper focuses on the deformation origin of PbZr0.52Ti0.48O3 (PZT) fiber mats obtained by electrospinning. The main cause of deformation of the green mats during heating was found to be a nonuniform relaxation of the stretched PVP polymer, due to nonuniform thermal decomposition of the Pb‐hexanoate in the fibers. This relaxation starts under 100°C, well below the polymer decomposition temperature. The shrinkage was found to accelerate above the polymer glass transition point, giving rise to an overall linear change of almost 50%. The “green” PZT mats were easily separated from the collector by first depositing a pure PVP sublayer on the collector. An optimal fabrication and slow multistep thermal treatment process that provides fiber mats with desired PZT phase and overcomes the nonuniform deformation is described. |
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