PRODUCT MADE OF GLASS-CRYSTAL MATERIAL AND GLASS-CRYSTAL MATERIAL FOR THE CLOSING PLATE OF AN ELECTRONIC DEVICE Russian patent published in 2022 - IPC C03C10/04 C03C10/14 C03C3/85 

FIELD: electronic industry.

SUBSTANCE: present invention discloses a product made of a glass-crystal material and a glass-crystal material for the closing plate of an electronic device. The glass crystal material contains lithium silicate and quartz crystal phase as the main crystalline phase and is characterized by a composition containing the following, wt. %: SiO₂ 65-85, Al₂O₃ 1-15, Li₂O 5-15, ZrO₂ 0.1-10, P₂O₅ more than 0.79 and less than 2, K₂O 0-10, MgO 0-10, ZnO 0-10 и Na₂O 0-5, while the ratio (SiO₂+Al₂O₃+Li₂O+ZrO₂)/P₂O₅ is 40-90. When determining the impact strength by the falling ball method, the height is 700 mm or more.

EFFECT: due to the proper selection of components, the glass-crystal material and the glass-crystal material product according to the present invention have excellent mechanical properties and obtaining a glass-crystal material or a glass-crystal material product suitable for electronic equipment is accompanied by lower costs.

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