عنوان مقاله [English]
B2O3-PbO, La2O3, Nb2O5 base glasses have uses in electro-optics, special reflective glazes and semi-mirror glasses. The aim of utilising of these glass systems as glaze bases is to attain special optical properties, for example, ultra high refractive index and low dispersion. In this research, B2O3, as a strong glass-former, hosted great amounts of PbO, La2O3 and Nb2O5. They were mostly colourless, or had low colour shades. The challenge was to achieve ultra-high optical properties stable glasses. Thermal Differential Analysis, DTA, experiments were carried out to determinate the glass stability. From the stable glasses, accurate slabs, circular bars and prisms were prepared for measuring optical properties. High refractive index and light dispersion were measured by minimum angle of deviation in prism. Results indicated that the stable glasses were limted. The light dispersion was low i.e. Abbe No.>10, and the relative reflection was 8-14.