The term muffle furnace is mostly used for furnaces that are not fixed to the place of use, have a smaller volume than industrial furnaces and have a maximum operating temperature of around 1000°C and above.
Muffle furnaces generally work with electrical energy. They consist of a sheet metal casing outside.
Inside this outer case is a heating chamber, usually made of brick or similar material. The part between the outside of this heating chamber and the outer case is filled with insulation layers.
Muffle furnaces are used in many different areas. They are used in the determination of ash content by burning the sample in the food industry, in the analysis of raw material quality in the plastics industry, as a heat treatment furnace in the metal industry, in sample preparation in the ceramic industry, and for experimentation in university laboratories.
