Lithium aluminosilicate glass with high modulus of elasticity, and method for producing same

摘要

A lithium aluminosilicate glass and a method for producing such lithium aluminosilicate glass are provided. The glass has a composition, in mol %, of: SiO2 60-70; Al2O3 10-13; B2O3 0.0-0.9; Li2O 9.6-11.6; Na2O 8.2-less than 10; K2O 0.0-0.7; MgO 0.0-0.2; CaO 0.2-2.3; ZnO 0.0-0.4; ZrO2 1.3-2.6; P2O5 0.0-0.5; Fe2O3 0.003-0.100; SnO2 0.0-0.3; and CeO2 0.004-0.200. Further, the composition complies with the following relations and conditions: (Li2O+Al2O3)/(Na2O+K2O) greater than 2; Li2O/(Li2O+Na2O+K2O) greater than 0.47 and less than 0.70; CaO+Fe2O3+ZnO+P2O5+B2O3+CeO2 greater that 0.8 and less than 3, where at least four out of the six oxides are included. The glass exhibits a modulus of elasticity of at least 82 GPa and has a glass transition point below 540° C. and/or a working point below 1150° C.

主权项

1. A lithium aluminosilicate glass, comprising a composition, in mol %, of:SiO260-70;Al2O310-13;B2O30.0-0.9;Li2O 9.6-11.6;Na2O8.2-less than 10;K2O0.0-0.7;MgO0.0-0.2;CaO0.2-2.3;ZnO0.0-0.4;ZrO21.3-2.6;P2O50.0-0.5;Fe2O30.003-0.100;SnO20.0-0.3; andCeO20.004-0.200, wherein said composition is in compliance with the following relations:
(Li2O+Al2O3)/(Na2O+K2O) greater than 2;Li2O/(Li2O+Na2O+K2O) greater than 0.47 and less than or equal to 0.586;CaO+Fe2O3+ZnO+P2O5+B2O3+CeO2 greater than 0.8 and less than 3 with at least four out of six oxides included; and wherein said lithium aluminosilicate glass exhibits a modulus of elasticity of at least 82 GPa and has a glass transition point Tg of less than 540° C. and/or a working point of less than 1150° C.