%0 Journal Article
%T Microstructure and Phase Composition of Yttria-Stabilized Zirconia Nanofibers Prepared by High-Temperature Calcination of Electrospun Zirconium Acetylacetonate/Yttrium Nitrate/Polyacrylonitrile Fibers
%J Fibers | An Open Access Journal from MDPI
%D 2019
%R https://doi.org/10.3390/fib7100082
%X 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¨C1300 ˇăC. 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 ˇăC, 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 Y 2O 3 concentrations in the range of 2¨C3 mol% at all used calcination temperatures. The addition of 2¨C3 mol% yttria to zirconia inhibited ZrO 2 grain growth, preventing nanofibersˇŻ destruction at high calcination temperatures. Synthesized well-sintered, non-porous, yttria-stabilized tetragonal zirconia nanofibers can be considered as a promising material for compositesˇŻ reinforcement, including composites with ceramic matrix. View Full-Tex
%U https://www.mdpi.com/2079-6439/7/10/82