What is a muffle furnace

Muffle Furnace is a kind of high-temperature heating equipment, which is mainly used for various heating, sintering, melting and other processes in a high-temperature environmentThe name of the muffle furnace derives from its design feature, which encloses the furnace chamber with a material with good heat retention to retain heat and achieve even distribution. The muffle furnace is capable of reaching high temperatures above 1000°C and is widely used in laboratory and industrial fields

Uses of muffle furnaces
Thermal processing: It is used for the thermal processing or treatment of small workpieces in the industrial workpiece handling, cement, and building materials industries.
Pharmaceutical industry: used for the inspection of drugs, pretreatment of medical samples, etc.
Analytical chemistry industry: It is used for sample processing in the fields of water quality analysis, environmental analysis, etc., and can also be used for petroleum and its analysis.
Coal quality analysis: used to determine moisture, ash, volatile matter, ash melting point analysis, ash composition analysis, elemental analysis, etc.
Food testing and pharmaceutical testing: for the drying or pre-treatment of samples.
Classification and characteristics of muffle furnaces
According to the appearance and shape, the muffle furnace can be divided into box furnace, tube furnace, crucible furnace, etc. The chamber furnace is suitable for handling large volumes, which is convenient for users to pick up and place samples; Tube furnaces are suitable for smaller sample volumes and can be treated with different atmospheres. Tube furnaces can also be divided into single-zone temperature-controlled tube furnaces and three-zone temperature-controlled tube furnaces, the latter can alleviate the heat loss at both ends of the furnace body and meet the requirements of sample gradient temperature control.

How the muffle furnace works
The working principle of a muffle furnace is based on resistance heating or induction heating, where heat is generated in a resistance wire by means of an electric current, and the heat is conducted to an object inside the furnace chamber. The design of the furnace allows the heat to be evenly distributed in the furnace chamber, ensuring that the sample is evenly heated at high temperatures.