TRANSPARENT LOW-COLOR LITHIUM ALUMINUM SILICATE GLASS CERAMIC AND THE USE THEREOF

摘要

A transparent low-colour lithium aluminium silicate (LAS) glass ceramic and the use thereof are provided. The ceramic has an environmentally friendly composition with high-quartz mixed crystals as the main crystal phase. The glass ceramic contains the following components (in wt % on the basis of oxide): TiO2 1.6-<2.5; Nd2O3 0.005-0.15; MgO 0.2-1.0; ZnO 1-2.5; CaO+SrO 0-1.5; BaO 0-1.5 with the condition B1: MgO+ZnO>CaO+SrO+BaO. In some embodiments, the glass ceramic has a hue c* of less than 5.5, a light transmission Y greater than 81% and has no visually disruptive diffusion.

主权项

1. A transparent Li2O—Al2O3—SiO2-(LAS) glass ceramic, comprising high-quartz mixed crystals as the main crystal phase, free of arsenic and antimony except for unavoidable raw-material impurities, and components (in wt. % based on oxide):TiO21.6-<2.5, Nd2O30.005-0.15,  MgO0.2-1.0, ZnO1-2.5,CaO + SrO    0-1.5, andBaO0-1.5,wherein a condition B1 comprises MgO+ZnO>CaO+SrO+BaO.