SINTERING PROCESS FOR CERAMIC SHEETS

摘要

Disclosed is a sintering process for ceramic sheets. After biscuit firing and glazing, a green body is placed in a kiln, wherein the temperature of the kiln is controlled such that: when the kiln temperature is 100-400° C., the temperature rise duration is 1-2 hours when the kiln temperature is 400-900° C., the temperature rise duration is 2-3 hours; when the kiln temperature is 900-1100° C., the temperature rise duration must reach 3 hours or more; when the kiln temperature is 1100-1350° C. the temperature rise duration is controlled to be 3-4 hours; and after the temperature reaches 1350° C., heat-preservation cooling is conducted; when the temperature drops to 1230-1270° C., the temperature is raised again to 1290-1310° C.; when the temperature drops again to 880-920° C., the kiln cover is opened for cooling, and the finished product is taken out.

主权项

1. A sintering process for ceramic sheets, putting a green body after biscuit firing and glazing into a kiln, characterized in that, the temperature control of the kiln comprises the following steps in sequence:
a. heating up slowly when the temperature of the kiln ranges from 100 to 400° C., the temperature rise duration ranges from 1 to 2 hours; b. heating up rapidly when the temperature of the kiln ranges from 400 to 900° C., the temperature rise duration ranges from 2 to 3 hours; c. heating up very slowly when the temperature of the kiln ranges from 900 to 1100° C., the temperature rise duration is longer than 3 hours; d, when the temperature of the kiln ranges from 1100 to 1350° C., controlling the temperature rise duration ranges from 3 to 4 hours; e. when the temperature of the kiln reaches 1350° C., cooling with a very slow cooling rate; f. when the temperature of the kiln falls to 1230 to 1270° C., raising the temperature to 1290 to 1310° C.; g. opening, the kiln and taking the product out of the kiln after re-cooling the kiln down to the range from 880 to 920° C.