Patent ID: 9033703
Filing Date: 2015-05-19
Classification: A61C,C04B,F27B,F27D

Abstract:
1. A total firing method for sintering a dental material comprising: heating a heating chamber in a first heating-up period at a first heating-up rate of more than 50° K/min, which heats up the furnace to at least 1000° C., continuing to heat the chamber in an intermediated heating period, wherein the first heating-up period is followed by the intermediate heating period, which is at least five minutes long, and continuing to heat the chamber in an end heating-up period, wherein the intermediate heating period is followed by the end heating-up period, during which heating-up is effected at a heating-up rate of more than 20° K/min, wherein the end heating-up period has a rate that is slower than the first heating-up rate, and holding the temperature in the end heating period for at least five minutes, above a temperature that has been measured at the end of the first heating-up period, and force cooling the furnace after the end heating period, wherein the total firing method takes place over a time span from a start of the first heating-up period at room temperature to the cooling down of the heating chamber to room temperature, wherein the heating chamber has a temperature higher than 1100° C. at least 68% of the time span of the total firing method, wherein during the intermediate heating period about 90 percent of final density of the dental material being sintered is achieved.