MICROCRYSTALLINE GLASS, MICROCRYSTALLINE GLASS ARTICLE AND METHOD FOR MANUFACTURE THEREOF Russian patent published in 2022 - IPC C03C10/04 C03C10/14 C03C3/85 

FIELD: glass.

SUBSTANCE: disclosed in the invention is microcrystalline glass, microcrystalline glass article suitable for display apparatuses or electronic apparatuses with high requirements for drop, compression and scratch resistance. The main crystalline phase of the microcrystalline glass contains lithium silicate and a crystalline phase of quartz. The strength of the microcrystalline glass article at four-point bending is therein greater than 600 MPa. The turbidity of the microcrystalline glass with a thickness of 0.55 mm is less than 0.6%. The microcrystalline glass contains the following components as a percentage by weight: SiO₂ 65 to 85; Al₂O₃ 6 to 11; Li₂O 5 to 15; ZrO₂ 0.1 to 10; P₂O₅ 0.3 to 3; K₂O 0 to 10; MgO 0 to 10; ZnO 0 to 10, wherein (SiO₂+Li₂O)/Al₂O₃ is 8.5 to 12 and (Al₂O₃+Li₂O)/P₂O₅ is 8.89 to 20. The microcrystalline glass article additionally contains the following components as a percentage by weight: SrO 0 to 5; and/or BaO 0 to 5; and/or TiO₂ 0 to 5; and/or Y₂O₃ 0 to 5; and/or B₂O₃ 0 to 3; and/or a brightening agent 0 to 2. The size of the microcrystals is less than 100 nm.

EFFECT: provided microcrystalline glass article with excellent mechanical properties.

37 cl, 12 tbl