Patent ID: 8739773

Claim:
A lubricious glass-coated metal cooking article capable of withstanding repeated heating and cooling between room temperature and at least 500° F. without chipping or cracking the glass coating, wherein: the glass coating includes about 0.1 to about 20% by weight of a homogeneously distributed dry refractory lubricant material, the dry refractory lubricant material consists of particles having a particle size less than 45 μm and an aspect ratio of less than 2:1, and the dry refractory lubricant material is selected from the group consisting of carbon; graphite; boron nitride; cubic boron nitride; molybdenum (IV) sulfide; molybdenum sulfide; molybdenum (IV) selenide; molybdenum selenide, tungsten (IV) sulfide; tungsten disulfide; tungsten sulfide; silicon nitride (Si 3 N 4 ); TiN; TiC; TiCN; TiO 2 ; TiAlN; CrN; SiC; diamond-like carbon; tungsten carbide (WC); zirconium oxide (ZrO 2 ); zirconium oxide and 0.1 to 40 weight % aluminum oxide; alumina-zirconia; antimony; antimony oxide; antimony trioxide; and mixtures thereof.