Method of producing glass-ceramic blank, and glass-ceramic blank
AssigneeGC Corporation
InventorsKenji Kojima, Koji Yamamoto
Life of this patent
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Abstract
Provided is a method of producing a glass-ceramic blank including: preparing plural glass-ceramic powders, laminating the glass-ceramic powders, so that colors of any adjacent layers of the powders are the same as or approximate to each other, and so that said any adjacent layers are different in total light transmittance, and pressure-molding the laminated powders; heating, at 500° C. to 800° C., a laminate obtained by the pressure molding to degrease the laminate; immersing an entire of the laminate after the degreasing in a colorant solution including a single-colored metal ion; and heat-treating, at higher than 750° C. and 1000° C. or lower, the laminate having immersed in the colorant solution.
Claims4
A method of producing a glass-ceramic blank formed by laminating plural layers, the method comprising:
- preparing plural glass-ceramic powders,
- laminating the glass-ceramic powders, so that colors of any adjacent layers of the powders are the same as or approximate to each other, and so that said any adjacent layers are different in total light transmittance, and pressure-molding the laminated powders;
- heating, at 500° C. to 800° C., a laminate obtained by the pressure molding to degrease the laminate;
- immersing an entire of the laminate after the degreasing in a single-colored colorant solution, the colorant solution includes a metal ion as a coloring agent;
- and
- heat-treating at higher than 750° C. and lower than 1000° C. so that the coloring agent has a uniform concentration in the glass-ceramic blank, wherein
- in the pressure molding, a color difference between said any adjacent layers is at most 5.5, and
- the glass-ceramic blank being a block-like material configured for dental restoration.
Dependencies are inferred from the claim text.