Temperature ceramic fuel directly related to the temperature of ripeness, the circumstances in which ceramic objects that have reached maturity precisely without changing shape. In order to turn into a ceramic clay, the clay which has been formed through the combustion process should the temperature exceed 600ºC. After going through this temperature, the clay will be transformed into a mineral dense, hard, and permanent, these changes are called ‘ceramic change’ atauperubahan ceramics.
Baked clay less than 600ºC not have the right ripeness despite changes ceramics, the temperature of ripeness is a vitrified clay or ceramic condition that has reached the proper temperature of ripeness without mengalamiperubahan form. For that before carrying out the combustion process, need to know in advance the type of clay used to form the ceramic objects.
Temperature maturity of clay have a fairly wide range, which is between 600ºC- 2000ºC.Apabila baked clay at low temperatures already mengkaca, means vitrified clay rendah.Dan to fix it can be done by adding kaolin or silica.
Picture 24.Efek vitrification.
Firing temperature affects the strength of the soil vitrification and high-temperature fuel liat.Semakin clay Earthenware and stonewaremaka closer vitrification and the higher power of fuel. However, if the fuel temperature has reached a total vitrifikasinya then the strength of the clay would be decreased and may even melt.
Figure 25. ceramic objects have undergone vitrification
In the following picture described the effect of the increase in fuel temperature and the strength of the vitrified clay Earthenware and stoneware.
26.Pengaruh image burn temperature of the vitrification and strength.