Abstract :
Ultra optical glasses are proposed for attaining noble glazes of high reflection and shine. In addition, these glasses can be used as semi-mirrors and optical instruments. In this research, attempts were devoted mainly to introduce a glass system with the highest possible refractive index in which the highest reflection is desirable. Thus, different amounts of heavy metal oxides modifiers, such as PbO and Bi2O3 were compounded with Ga2O3 as a glass former, and were melted to determine the stable glass regions in the corresponding three oxide glass systems. Results suggested that the most stable glasses were located in the eutectic region of the above oxides three phase diagram, where the melting point was as low as 900OC. DTA measurements presented glass stability values as the differences between the glass crystallinity and transition temperatures, Tc-Tg. The “Minimum angle of deviation of light in a prism” was employed to measure refractive indices greater than 1.8, in which the highest results were above the diamond refractive index, i.e. 2.417. Dispersion property, as Abbe Number, was as low as 10 for the lowest content Ga2O3. Noble glazes or coats can be tailored and fabricated based on these ultra optical glass systems, which possess high reflection and optical non-linearity.
