Colored glass-ceramics having petalite and lithium silicate structures

    公开(公告)号:US11840475B2

    公开(公告)日:2023-12-12

    申请号:US17864693

    申请日:2022-07-14

    CPC classification number: C03C10/0027 C03C1/04 C03C4/02 C03C2204/00

    Abstract: A glass-ceramic article comprises a petalite crystalline phase and a lithium silicate crystalline phase. The weight percentage of each of the petalite crystalline phase and the lithium silicate crystalline phase in the glass-ceramic article are greater than each of the weight percentages of other crystalline phases present in the glass-ceramic article. The glass-ceramic article has a transmittance color coordinate in the CIELAB color space of: L*=from 20 to 90; a*=from −20 to 40; and b*=from −60 to 60 for a CIE illuminant F02 under SCI UVC conditions. In some embodiments, the colorant is selected from the group consisting of TiO2, Fe2O3, NiO, Co3O4, MnO2, Cr2O3, CuO, Au, Ag, and V2O5.

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