Wollastonite crystallized glass for artificial tooth and method for coloring same

A method for coloring a wollastonite-based crystallized glass for an artificial tooth, the method comprising:

• (a) drying, weighing and ball-milling raw glass powders and coloring additive powders, wherein the raw glass powders includes SiO2, CaO, CaF2 and Na2O;
• (b) introducing the ball-milled raw glass powders and coloring additive powders into a furnace, and calcining the powders therein at 950 to 1050° C. for 1 to 3 hours, and then cooling the powders to a room temperature;
• (c) melting the calcined powders to form a glass, comprising increasing the calcined powders to 1400 to 1500° C. at an increase rate of 8 to 12° C./min, and then performing melting of the powders at 1400 to 1500° C. for 30 to 120 minutes;
• (d) introducing the glass into a preheated mold at 450 to 550° C., preforming a thermal-stress removal heat-treatment of the glass at 450 to 550° C. for 1 to 3 hours, and cooling the glass to a room temperature;
• and
• (e) preforming a two-steps crystallization heat-treatment of the glass and then cooling the glass to a room temperature to form a crystallized glass, wherein the two-steps crystallization heat-treatment includes a first heat-treatment of the glass at a nucleation temperature, and a second heat-treatment of the glass at a crystallization temperature.