Advisory Committee Chair
Advisory Committee Members
Date of Award
Degree Name by School
Doctor of Philosophy (PhD) College of Arts and Sciences
Nanofibrous ceramics are some of the most promising nano-materials but current production methods are too expensive, too slow, and too inconsistent for applications outside of laboratory proof of concepts. The refractors, catalytic, and aerospace industries have long had an interest in these materials because of their superior thermal, physical, and chemical resistant properties. Ceramic nanofiber structures in the Al2O3-SiO2-MgO system were fabricated from polyvinyl butyral based precursor-nanofibers prepared using a novel free-surface alternating field electrospinning method (AFES). Precursor fibers were generated at rates up to 8.8 g/h and collected as 100–300 μm thick sheets suitable for direct conversion into the nanofibrous alumina, spinel, and mullite structures. The effects of annealing temperature and heating rate on the nanofiber diameter, morphology, and crystalline phase formation were investigated by Scanning Electron Microscopy (SEM) and X-ray diffraction (XRD). Mechanical properties of the fibrous ceramic sheets after calcination temperatures in the range of 600 °C to 1200 °C and heating rates of 1 °C/m and 5 °C/m were determined using linear tensile measurement.
Brayer, W Anthony, "Alternating Field Electrospinning for Fabrication of Inorganic Nanofibers in the AL2O3-SIO2-MGO System" (2022). All ETDs from UAB. 505.