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Phase Transformation and Morphological Evolution of Electrospun Zirconia Nanofibers During Thermal Annealing by Luping Li; Peigen Zhang; Jiandong Liang; S.M. Guo is a Materials Science article available to read on EtoBox.

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Pure zirconia nanofibers were fabricated by electrospinning zirconia-polymer precursor and subsequent annealing. Fiber properties such as polymer decomposition, crystallization formation, phase transformation, surface morphologies, etc., were investigated by various techniques, including thermogravimetric analysis (TGA) and differential thermal analysis (DTA), high temperature differential scanning calorimeter (HTDSC), powder X-ray diffractometer (XRD), field emission scanning electron microscopy (FESEM), etc. It was found that the crystallization of as-spun fibers started at 450 8C and the initial crystallized zirconia phase was tetragonal (t), which began transforming to monoclinic (m) phase at 650 8C as evidenced by XRD; HTDSC showed at different thermal circles, the m-to-t transformation temperatures remained virtually unchanged while the reverse t-to-m temperatures systematically shifted from 924.9 to 978.6 8C as the progress of thermal circles; FESEM examinations revealed that fibers calcined to 1000 8C went through thermal grooving due to surface diffusion during heat treatment; fibers heated to 1370 8C formed the so-called ''bamboo wires'', where volume diffusion was the do

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Author

Luping Li; Peigen Zhang; Jiandong Liang; S.M. Guo

Publisher

Elsevier Science; Elsevier ; Elsevier Ltd.; Elsevier BV (ISSN 0272-8842)

Published

2010

Language

EN

Field

Materials Science (Physical Sciences)