A kind of glass ceramics with transmittance close to glass precursor and preparation method thereof

Abstract

The present invention provides a glass ceramic with a transmittance close to that of a glass precursor, which includes SiO in mole percent 2 : 60‑75mol%, Al 2 o 3 : 2‑10mol%, P 2 o 5 : 0‑5mol%, ZrO 2 : 0.5‑3mol%, Na 2 O: 0.5‑6mol%, Li 2 O: 15‑28 mol%, and B 2 o 3 : at least one of 0‑5mol%, MgO: 0‑5mol%, ZnO: 0‑5mol%, and HfO 2 : 0‑2mol%, Ta 2 o 5 : 0‑2mol%, Y 2 o 3 : at least one of 0‑2mol%, and satisfy 0<HfO 2 +Ta 2 o 5 +Y 2 o 3 ≤2mol%, the visible light transmittance of the glass ceramic is 0.3-5% different from the transmittance of the glass precursor for preparing the glass ceramic. The invention reduces the difficulty of regulating the visible light transmittance of the glass ceramics, so that the visible light transmittance of the glass ceramics is only 0.3-5% different from the visible light transmittance of the glass precursor.

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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