Abstract :
I
n order to attain glasses with ultra dispersions properties, different heavy metal oxides were used. The desired glasses were obtained from the addition of high amounts of PbO and Bi2O3 to B2O3 based glasses. Refractive index measurements were carried out accurately at different wavelengths by ʹthe minimum angle of deviation in prismsʹ method employing a spectrometer. Results indicated that, as the amount of Bi2O3 increased in the glass system, the measured dispersions deviated from the commercial glass trend to the higher levels, due to the presence of higher number of non-bridging oxygen bonds. Since the research is genuine, and along with it, many families of glasses have been tried elsewhere, it may require more studies to be done, till better and higher optical quality glasses are conquered. These glasses can be employed in designing and constructing novel coatings or glazes, in which the incident white light entering, the coating layer, refracts out broadly in different colors. Therefore, these glazes will appear in different colors, when are observed at different angles.
