CPC C03C 3/097 (2013.01) [C03C 3/095 (2013.01); G02F 1/133305 (2013.01); H01L 31/03926 (2013.01); H10K 77/111 (2023.02); H10K 2102/311 (2023.02)] | 8 Claims |
1. A composition for glass, in molar percentage, in the composition, the total content of SiO2, B2O3, P2O5, GeO2 and TeO2 is 60˜85 mol %; the total content of Al2O3 and Ga2O3 is 3˜20 mol %; the total content of ZnO and Y2O3 is 0.1˜5 mol %; and the total content of alkaline earth metal oxide is 4˜30 mol %;
wherein, in molar percentage, the value D calculated by Formula (I) is within the range of from 2 to 19,
D=P1×(B2O3+P2O5+0.5×GeO2+0.5×TeO2)+P2×(1.5×Y2O3+ZnO)+P3×(MgO+BaO)+P4×(1.5×CaO+SrO)+P5×(Al2O3+Ga2O3)+P6×SiO2; Formula (I):
in Formula (I), P1 is −0.5, P2 is −3, P3 is −1.5, P4 is 1, P5 is 2, and P6 is 0.25;
wherein SiO2, B2O3, P2O5, GeO2, TeO2, Al2O3, Ga2O3, ZnO, Y2O3, MgO, CaO, SrO and BaO are all shown in molar percentage in the composition;
in molar content, the sum of the contents of B2O3 and P2O5 is greater than 0, and a ratio of the sum of the contents of B2O3 and P2O5 to the sum of the contents of B2O3, P2O5, GeO2 and TeO2 is 0.86˜1;
in molar content, the ratio of the content of Al2O3 to the sum of the contents of Al2O3 and Ga2O3 is 0.7˜1;
in molar content, the ratio of the sum of the contents of MgO and BaO to the sum of the contents of MgO, CaO, SrO and BaO is greater than 0.5;
for the aluminosilicate glass, a thermal expansion coefficient is less than 40×10˜7/° C. within the range of 50˜350° C., the difference between a forming temperature T4 and a liquidus temperature T1 is higher than 90° C., and the Young's modulus is lower than 80 GPa;
the fracture toughness KIC of the aluminosilicate glass is greater than 1.0 MPa·m1/2.
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