Muffle Furnace
Muffle Furnace
Objective
It is used for high-temperature applications such as: Fusing glass, creating enamel coatings, Ceramics, Soldering, Brazing and They are also used in many research facilities.
Operating Mechanism
A precious metal thermocouple senses the temperature in the chamber and transmits this information to the temperature control in millivolts. The control section consists of a temperature controller, a current controller, a transformer, a contactor (relay), a circuit breaker. The temperature controller senses the furnace temperature (by means of the thermocouple) and adjusts electricity to the heating elements by means of the current controller. The current controller controls electricity to the heating elements by adjusting the magnitude of the electrical current (rather than turning the electricity completely on or off). This is the preferred method of controlling electricity to molybdenum disilicate heating elements. When all the necessary work is done and the current is controlled then sample gets heated to the desired temperature and then removed.
There is usually no combustion involved in the temperature control of the system, which allows for much greater control of temperature uniformity and assures isolation of the material being heated from the by-products of fuel combustion.