The viscositites and surface tensions of three MgO-Al2O3-Y2O3-SiO2-based oxynitride glass melts were measured. Glass transition temperature, Littleton temperature and sink-in temperature were obtained, and by using the Vogel-Fulcher-Tammann equation the viscosities were calculated from Tg (820 to 940 deg C) to 1600 deg C.
Origin
Tech Universitat Clausthal, Germany
Journal Title
J Am Ceram Soc 78 4 1995 1123-1124
Sector
Special Glass
Class
S 857