Abstract:Three flexible insulations made from different ceramic fibers were treated at 300益, 600益and 900益
for 30 min in atmosphere, respectively. Tensile strength was studied with a different variation of the heat treatment
temperature and fiber surface was observed by SEM. By analyzing the fracture mechanism of the fiber, the main rea鄄
son leading to the decrease of tensile strength at high temperature was suggested, which was the ablation of agent on
fiber surface and the crystal transition of amorphous fiber.