How does a muffle furnace work?

A muffle furnace, also known as a retort furnace, is a piece of oven-type equipment that can reach high temperatures. It usually works by putting a high-temperature heating coil in an insulating material. The insulating material effectively acts as a muffle, preventing heat from escaping.

How does a muffle furnace work?
A Muffle furnace allows rapid high-temperature heating, recovery, and cooling in self-contained, energy-efficient cabinets. A muffle furnace separates the object to be heated from all byproducts of combustion from the heat source. In modern electrical furnaces, a radiation or convection energy applies heat to a chamber using a high-temperature heating coil inside insulated material. The insulating material effectively acts as a muffle, preventing heat from escaping
Muffle furnaces now use technology and design to achieve greater control of temperature uniformity and isolate heated materials from combustion contaminants. This makes muffle furnaces ideal for ashing samples, heat-treating applications, and materials research.

Laboratory environments commonly use muffle furnaces for high-temperature applications. These applications include:

Melting glass
Creating enamel coatings
Technical ceramics
Soldering and brazing

Infitek Muffle Furnace FNC-BX Series

1.1200℃- 1700°C maximum operating temperature;

2. High purity fibrous alumina insulation for maximum energy saving;

3. Double layer steel structure with air cooling fan to keep furnace’s exteriors safe to touch;

4. Safety interlock with automatic power off the furnace when door is opened;

5. PID automatic control via current limiting phase angle fired the resistor, e.g. SC R (Silicon Controlled Rectifier);

6. Power control with 30 segments programmable.