The influence of zirconia precursor/binding polymer mass ratio in the intermediate electrospun composite fibers on the phase transformation of final zirconia nanofibers
2019/11/27 21:26:43
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Nanofibrous zirconia was fabricated by calcination of electrospun zirconium oxychloride/polyethylene oxide (PEO) composite fibers with different mass fraction of the components. ZrO2 nanofibers were characterized by scanning electron microscopy (SEM), nitrogen adsorption at 77 K, and X-ray diffractometry (XRD). It was revealed that increase in ZrO-Cl-2/PEO mass ratio above the threshold value significantly decreases tetragonal phase (t-ZrO2) content and increases monoclinic phase (m-ZrO2) content in final ceramic nanofibers. Distinct t-ZrO2 -> m-ZrO2 transformation takes place when average ZrO2 grain size approaches to 30 nm. (C) 2016 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim
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