CHARGE FOR PRODUCING GLASS CERAMIC MATERIAL Russian patent published in 1999 - IPC

FIELD: ceramics technology; corundum base glass ceramics; materials for mechanical engineering, food and building industries. SUBSTANCE: charge for producing environmentally friendly glass ceramics incorporates in its composition corundum and glass in following proportion, mass percent: corundum - 50-75; glass - 25-50; glass is taken in powdered condition obtained by crushing broken glass of food containers or glass wastes in following composition, mass percent: SiO₂ - 67.73; Al₂O₃ - 3.2-10; CaO - 6.5-6.9; MgO - 4.3- 5.1; R₂O(Na₂O+K₂O) - 14-14.3; Fe₂O₃ - 0.1-1.5. EFFECT: reduced shrinkage of material during its sintering and improved crack resistance. 4 tbl, 2 ex