Optical properties and zero photoelastic constant of ns2-type metal cation containing oxide glasses

Colorless SnO- and Sb2O3-containing borate and borosilicate glasses with small photoelastic and high refractive properties

“…The unexpected Al 2 O 3 components from the aluminum crucible contaminated the binary systems within the levels of ∼3 to 5 mol%. 6,8) The density of bulk samples was determined using the Archimedes method with kerosene as an immersion liquid for the glasses at room temperature. The error range of the measured densities was within ±0.02 g cm −3 .…”

“…4) The 6s electron wavefunctions of Pb 2+ deform to the pressure-induced polarization of the oxygen 2p electrons for the PbO-SiO 2 glasses accompanying with zero or negative PEC. 5,6) However, Pb 2+ containing glasses should be eliminated from the toxicity perspective. We aim for visibly transparent, high refractive index, and zero photoelastic oxide glasses without using hazardous elements.…”

“…The SnO-or Sb 2 O 3 -containing silicate glasses with chemical compositions of SnO-SiO 2 , 7,8) Sb 2 O 3 -SiO 2 , 6) SnO-B 2 O 3 , 9) and Sb 2 O 3 -B 2 O 3 8) with high refractive index and very small PEC have been reported. Among them, the drawback of the silicate glasses was the colorization of a pale yellow.…”