Y3Al5O12-Sio2 Glasses: Structure And Polyamorphism

Aerodynamic levitation and CO2 laser melting have been used to synthesize the yttrium aluminosilicate glasses zY2O3yAl2O3-xSiO2 with z/y=3/5 corresponding to the YAG (Y3Al5O12) composition and x between ~5 and ~45 mol%. The low and high-density (LDA inclusion and HDA matrix) polyamorphic phases in glasses with less than ~14 mol% SiO2 were identified with backscattering electron imaging.