Infrared electromagnetic waves in is defined in physics science as a part of electromagnetic waves that their amplitude of wavelength is upper than that of visible red light and is lower than that of invisible microwave waves. The amplitude of these waves is varying approximately between 1000 microns to 740 nano meters (limit of visible light), so they are classified as waves possessing shorter amplitudes than conventional radio waves. Infrared waves have found many application in many majors of science (judicial science, finger print, chemistry, physics) and engineering majors (medical, aerospace).
For instance we can get help from these waves in medical fields such as tomography, pain relief, muscle spasms, increased blood supply, and so many others. Also infrared waves can be used in astronomy science, night vision devices, and measuring devices.
The main application of these waves can be summarized in manufacturing and production industries (such as cooking, welding/brazing or heat treatment of materials), and recognition and analysis of materials. Nowadays infrared waves have found its position in many of industries as a modern and safe source of heating. Heating technology by using infrared waves transfers a large amount of energy in a short time.Infrared waves are famous as sources of radiant heat generation, and in order to warm any surfaces, these electromagnetic waves should be absorbed by the surface with any wavelengths. Infrared radiation could function as sources of heating just like the furnace. Their heating systems could be used in performance of industrial processes like coating oblate operations, annealing, welding and hard brazing of metals and ceramics.
In this plan, for the first time in the country, design method and production of a tubular furnace by use of infrared lamps, will be implemented, that could provide a very high rate of heating (~ 400 °C/min) up to 1600-1700 °C In accordance with the lack of such furnaces in the country and also the urgent need and in order to address the technological challenges in a wide area of industrial and collegiate researches, the use of this furnace has become inevitable (figure 1).
It is worth noting that the infrared furnace produced in the research laboratory of advanced furnaces of mechanical engineering faculty as the first existing sample in the country could lead to the large and wide positive changes in the heating systems of collegiate and industrial furnaces.