BLUE GLASS AND A METHOD FOR PRODUCTION THEREOF Russian patent published in 2019 - IPC C03C3/87 C03C4/02 

FIELD: manufacturing technology.

SUBSTANCE: invention relates to blue glass. Blue glass contains the following components, wt%: SiO₂ – 65.0–75.0; Al₂O₃ – 0.9–5.0; CaO – 7.0–10.0; MgO – 3.0–5.0; K₂O – 0.3–0.6; Na₂O – 13.0–20.0; SO₃ – 0.2–0.4; Fe₂O₃ (total iron) – 0.65–0.95; FeO – 0.15–0.33; CoO – 0.003–0.03; Se – 0–0.011; Redox glass is within 0.23–0.35. Following components are introduced into the mixture for producing blue glass, kg/1 t of glass mass: iron oxide – crocus 2.5–4.5, iron powder 2.5–4.5, sodium nitrate NaNO₃ 3.5–5.0, sodium sulphate 5.0–8.0, where NaNO₃+NaCI+Na₂SO₄=11.0–13.0; Na₂SO₄:(NaNO₃+NaCI)=1:(0.7–1.3). Glass has a thickness of – 5 mm dominant wavelength (λ_DW,) in range of 480–489 nm, purity of color (C) – 7.0–12.0, optical and energy parameters, respectively, within the limits of, %: LTA – 30–70; TSUV – 29–41; TSIR – 20–33; TSET – 27–48.

EFFECT: obtaining blue sheet glass with lighting and power parameters, which provide improved comfort inside glazed spaces.

4 cl, 4 ex