Muffle is a kind of furnace normally used for melting metals and for cooking materials using thermal energy. The operation of this equipment is based on high temperatures, this is possible thanks to the fact that it is made up of a closed chamber, which is covered with a refractory material that enables a uniform heat delivery inside, being able to reach temperatures of up to 1,700° C. On the other hand, the muffle operates in a more controlled way than that of a conventional oven, since it monitors and regulates the temperature at all times.