C CHEMISTRY; METALLURGY
C03 GLASS; MINERAL OR SLAG WOOL
C03C CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
C03C10/00 Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
C03C10/0036 containing SiO2, Al2O3 and a divalent metal oxide as main constituents
C03C10/0045 containing SiO2, Al2O3 and MgO as main constituents