Multicolor light-storing ceramic for fire-protection indication and preparation method thereof

A preparation method of a multicolor light-storing ceramic for fire-protection indication, comprising:

• step (1) adding a glass based raw material, a light-storing powder, a dispersant and an alumina powder into a granulator, adding water mixed with a pore-forming agent into the granulator, and then mechanically stirring for granulation by the granulator;
• adding a plasticizer into the granulator after the stirring of 4˜8 hours (h), and continuing the stirring for 1˜3h to thereby obtain a mixture;
• wherein a stirring speed of the stirring is in a range from 100 radians per minute (rad/min) to 300rad/min, and the glass based raw material comprises a recycled float glass waste or a recycled industrial waste glass;
• step (2) packing the mixture obtained in the step (1) into a mold, performing tabletting to the mixture packed into the mold by an automatic tablet presser, and then demolding to obtain a green body and subsequently delivering the green body to a kiln for drying and firing;
• wherein a shape of the mold is required for target product requirements, a pressure during performing the tabletting is in a range from 5 megapascals (MPa) to 40 MPa, and a pressure holding time during performing the tabletting is in a range from 5 seconds (s) to 20s;
• step (3) drying and firing the green body in the kiln, comprising:
• heating from room temperature to 200 Celsius degrees (° C.) at a rate of 2˜5 Celsius degrees per minute (° C./min) and then holding for 10˜30 minutes (min), then continuing to heat up to 400˜900° C. and holding for 60˜120 min, and subsequently cooling down to below 100° C. with the kiln and taking out to obtain a light-storing self-luminous quartz ceramic;
• and
• step (4) printing a pattern onto a surface of the light-storing self-luminous quartz ceramic, and then curing the light-storing self-luminous quartz ceramic with the pattern under a temperature in a range from 300° ° C.to 600° C. for 20˜40 min to obtain a light-storing ceramic for indication sign.