Microstructure and Crystallization Behavior of Glasses in the ZrO_2-ZnO-AI_2O_3-SiO_2 System

摘要

Crystallization behavior of ZrO_2-ZnO-Al_2O_3-SiO_2 glass has been studied by differential thermal analysis, X-ray diffraction analysis and scanning electronic microscope. ZrO_2 doped in the glass induces the phase separation effectively. The crystal phases obtained are gahnite (ZnAl_2O_4) and a small amount of ZrO_2 phase. SEM photographs show that the crystal phases distribute uniformly in the glass ceramics and the grain sizes of glass ceramics after different heat treatment are less than 60nm.