Glass ceramic with transmittance close to that of glass precursor and preparation method of glass ceramic

Abstract

The invention provides a glass ceramic with transmittance close to that of a glass precursor. The glass ceramic comprises the following components in percentage by mole: 60 to 75 mol% of SiO2, 2 to 10mol% of Al2O3, 0 to 5 mol% of P2O5, 0.5 to 3 mol% of ZrO2, 0.5 to 6 mol% of Na2O, 15 to 28 mol% of Li2O, at least one of 0 to 5 mol% of B2O3, 0 to 5 mol% of MgO, and 0 to 5 mol% of ZnO, and at leastone of 0 to 2 mol% of HfO2, 0 to 2 mol% of Ta2O5, and 0 to 2 mol% of Y2O3, wherein the sum of the amounts of HfO2, Ta2O5 and Y2O3 is more than 0 and less than or equal to 2 mol%, and the difference between the visible light transmittance of the glass ceramic and the transmittance of the glass precursor for preparing the glass ceramic is 0.3-5%. According to the invention, the regulation and control difficulty of the visible light transmittance of the glass ceramic is reduced, so that the difference between the visible light transmittance of the glass ceramic and the visible light transmittanceof the glass precursor is only 0.3-5%.

Description

technical field [0001] The invention relates to glass ceramics, in particular to a glass ceramic with a transmittance close to that of a glass precursor and a preparation method thereof. Background technique [0002] Glass-ceramics, also known as glass-ceramic, is a kind of composite material combined with crystal phase and glass made through high-temperature melting, molding, and heat treatment. In recent years, glass ceramics have been widely used in machinery manufacturing, optics, electronics and microelectronics, aerospace, Chemical, industrial, biomedical and construction fields. [0003] Ordinary glass has not undergone heat treatment, chemical strengthening and other processes. Although it has relatively high transmittance, its various characteristics, such as mechanical properties, chemical stability, electrical properties, etc., are inferior to glass ceramics. However, glass ceramics can The above performance requirements are met, but its transmittance is quite d...

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a glass ceramic with a transmittance close to that of a glass precursor and a preparation method thereof, aiming at solving the problem that the transmittance of the existing glass ceramic is different from that of the glass precursor during the preparation process. The problem of large difference in pass rate

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