Decorative enamel for glass-ceramics having low coefficients of thermal expansion

摘要

This invention is concerned with the preparation of thermally crystallizable enamels suitable for application to glass-ceramics, particularly glass-ceramics having coefficients of thermal expansion less than 15x10-7/ DEG C. The enamels are capable of being fired to maturity simultaneously with the precursor glass body being crystallized to a glass-ceramic. The enamels consist essentially, expressed in weight percent on the oxide basis, of: SiO2: 36-58 Al2O3: 8.5-16 CaO: 0.5-10 PbO: 27-40 K2