STEKLOKREMNEZIT: NEW STRUCTURAL GLASS- AND SILICON-BASED MATERIAL Russian patent published in 1997 - IPC

FIELD: building practice; production of facing slabs possessing superior physico-mechanical properties and intended to protect structures and process equipment against moisture and radiation. SUBSTANCE: proposed material comprises optical glass scrap in form of glass granules and magnesium fluoride, said components being taken in weight ratio, wt. %: optical glass scrap 85-95, magnesium fluoride 5-15. Optical glass has following composition, wt. %: PbO 70.71; SiO₂ 27.19; K₂O 1.0; Na₂O 0.5; Sb₂O₃ 0.30; Al₂O₃ 0.30. EFFECT: new promising structural material. 2 tbl