Study on Mullite Transparent Ceramic Film Prepared by Sol-Gel

Mullite gel was prepared by sol-gel approach through controlled hydrolysis of isopropyl alumium and ethyl orthosilicate, the mullite transparent cereamic film of was sintered at the temperature lower than mullite melt. Mullite gel and transformation of crystal type and vibration spectrum of its high temperature produt and the coordination state of aluminumi on were studied by X-ray diffraction, IR spectera and nuclear magnetic resonance etc., and the changerule of its structure has been tentatively revealed.