Preparation of High-Quality Zirconia Fibers by Super-High Rotational Centrifugal Spinning of Inorganic Sol

摘要

A novel inorganic sol-gel method for preparation of high-quality zirconia fibers was proposed, with starting from the reaction between ZrOCl_2· 8H_2O (ZOC) and H_2O_2. The spinning solution with good spinnability was obtained by controlling the mole ratio of H_2O_2/ZOC to 4 for reaction, and the mole ratio of Cl/Zr remained close to 1 in the reacted solution. The double chain structure of the inorganic poly-zirconium molecule in the spinning solution was determined by elemental analysis and FT-IR. The precursor fibers were obtained by using a novel 30,000 rpm centrifugal spinning apparatus. Being heat-treated to 1300°C under steam atmosphere, the precursor fibers transformed to zirconia fibers which had relatively high strength and good flexibility, with length of more than 10cm and diameters of 5-10μm.