Abstract:

With BaO-TiO₂ -SiO₂ -R_m O_n glasses as the research object,large-sized titanate glasses with a refrac-tive index of 1.8338~1.9189 were prepared by the melting method.In the preparation process,the mass fractions of SiO₂ were respectively controlled at 15%,12% and 10%;the sums of the mass fractions of BaO and TiO₂ were respectively controlled at 73%,76% and 78% with different ratios of BaO to TiO₂.The refractive indexes and the
densities of the prepared glasses were respectively measured by using a W YV-V prism and by means of the Archi-medes method.The results show that,with the increase of the mass ratio of BaO to TiO₂,the refractive indexes of the glasses decrease,while the densities first increase and then decrease.At the mass ratio of 2.077,the density shows a maximum .The above-mentioned results were finally qualitatively analyzed according to the rules of additive and polarization.

Key words: titanate glass, component, refractive index, density