METHOD OF PRODUCING GREEN HEAT-ABSORBING GLASS FOR VEHICLES AND CONSTRUCTION Russian patent published in 2014 - IPC C03C4/02 C03C3/87 

FIELD: chemistry.

SUBSTANCE: method of producing green heat-absorbing glass is carried out by controlling the redox potential of glass mass by adding a mixture of oxidising agents and reducing agents to the charge mixture: oxidising agents - sodium sulphate and sodium nitrate (Na₂SO₄+NaNO₃) in total amount of 10.0-12.5 kg per ton of glass mass, with the ratio (Na₂SO₄:NaNO₃)=(4-2):1 and a carbon (C) reducing agent with the ratio (Na₂SO₄+NaNO₃):C=1:(0.02-0.025). Additional dyes from the family Cr₂O₃, CuO, Pr₂O₃, V₂O₅ can also be added to the charge mixture, with the following content thereof in the glass, wt%: Cr₂O₃ - 0-0.03; CuO - 0-0.25; Pr₂O₃ - 0-0.07; V₂O₅ - 0-0.08 and mixtures thereof. Said glass has a visible light transmission coefficient (T_V)≥70% and full solar energy transmission coefficient (T_S)≤50% with dominant wavelength λd of 498-530 nm and degree of reduction of Fe₂O₃ therein to FeO of 25-30%.

EFFECT: obtaining green heat-absorbing glass for vehicles and construction.

3 cl, 1 tbl, 5 ex