COLORED GLASS-CERAMICS HAVING PETALITE AND LITHIUM SILICATE STRUCTURES
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United States of America Patent
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Issued Date -
May 16, 2024
app pub date -
Nov 14, 2023
filing date -
May 29, 2019
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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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