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Microstructure and Phase Composition of Yttria-Stabilized Zirconia Nanofibers Prepared by High-Temperature Calcination of Electrospun Zirconium Acetylacetonate/Yttrium Nitrate/Polyacrylonitrile Fibers

Institute for Nanotechnology and Nanomaterials, Derzhavin Tambov State University, Internatsionalnaya str.33, 392000 Tambov, Russia
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Fibers 2019, 7(10), 82; https://doi.org/10.3390/fib7100082
Received: 14 August 2019 / Revised: 7 September 2019 / Accepted: 19 September 2019 / Published: 25 September 2019
For the first time, dense nanofibers of yttria-stabilized tetragonal zirconia with diameter of ca. 140 nm were prepared by calcination of electrospun zirconium acetylacetonate/yttrium nitrate/polyacrylonitrile fibers at 1100–1300 °C. Ceramic filaments were characterized by scanning electron microscopy, X-ray diffractometry, and nitrogen adsorption. With a rise in the calcination temperature from 1100 to 1300 °C, the fine-grain structure of the nanofibers transformed to coarse-grain ones with the grain size equal to the fiber diameter. It was revealed that fully tetragonal nanofibrous zirconia may be obtained at Y2O3 concentrations in the range of 2–3 mol% at all used calcination temperatures. The addition of 2–3 mol% yttria to zirconia inhibited ZrO2 grain growth, preventing nanofibers’ destruction at high calcination temperatures. Synthesized well-sintered, non-porous, yttria-stabilized tetragonal zirconia nanofibers can be considered as a promising material for composites’ reinforcement, including composites with ceramic matrix. View Full-Text
Keywords: electrospinning; ceramic nanofibers; yttria doped zirconia; microstructure; phase composition; composites reinforcement electrospinning; ceramic nanofibers; yttria doped zirconia; microstructure; phase composition; composites reinforcement
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Rodaev, V.V.; Razlivalova, S.S.; Tyurin, A.I.; Zhigachev, A.O.; Golovin, Y.I. Microstructure and Phase Composition of Yttria-Stabilized Zirconia Nanofibers Prepared by High-Temperature Calcination of Electrospun Zirconium Acetylacetonate/Yttrium Nitrate/Polyacrylonitrile Fibers. Fibers 2019, 7, 82.

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