WHITE, OPAQUE, β-SPODUMENE/RUTILE GLASS-CERAMICS ; ARTICLES COMPRISING THE SAME ; AND METHODS FOR MAKING THE SAME

• Main Authors: SMITH CHARLENE MARIE, COMTE MARIE JACQUELINE MONIQUE, TIETJE STEVEN ALVIN, PINCKNEY LINDA RUTH, BEALL GEORGE HALSEY, STEWART RONALD LEROY, DALE GEORGE OWEN
• Format: Patent
• Language: English; Korean
• Published: 21.01.2015
• Subjects: CHEMICAL COMPOSITION OF GLASSES, GLAZES, OR VITREOUSENAMELS; CHEMISTRY; GLASS; JOINING GLASS TO GLASS OR OTHER MATERIALS; METALLURGY; MINERAL OR SLAG WOOL; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS,MINERALS OR SLAGS; SURFACE TREATMENT OF GLASS

Crystallizable glasses, glass-ceramics, IXable glass-ceramics, and IX glass-ceramics are disclosed. The glass-ceramics exhibit ²-spodumene ss as the predominant crystalline phase. These glasses and glass-ceramics, in mole%, include: 62-75 Si O 2 ; 10.5-17 Al 2 O 3 ; 5-13 Li 2 O; 0-4 ZnO; 0-8 MgO; 2-5 TiO 2 ; 0-4 B 2 O 3 ; 0-5 Na 2 O; 0-4 K 2 O; 0-2 ZrO 2 ; 0-7 P 2 O 5 ; 0-0.3 Fe 2 O 3 ; 0-2 MnOx; and 0.05-0.2 SnO 2 . Additionally, these glasses and glass-ceramics exhibit the following criteria: a. a ratio: [Li 2 O+Na 2 O+K 2 O+MgO+ZnO] [Al 2 O 3 +B 2 O 3 ] *between 0.7 to 1.5; b. a ratio: [TiO 2 +SnO 2 ] [SiO 2 +B 2 O 3 ] greater than 0.04. Furthermore, the glass-ceramics exhibit an opacity ‰¥ about 85% over the wavelength range of 400-700nm for an about 0.8mm thickness and colors an observer angle of 10° and a CIE illuminant F02 determined with specular reflectance included of a* between -3 and +3, b* between -6 and +6, and L* between 88 and 97.