Microwave material processing is a new processing technic that practicable to various type of materials such as claddings, metals, coatings, FRP, powder metallurgy, and ceramics. The main purpose of this processing technologies developments are increasing product features, diminish creation cost, accelerating product progress, and saving energy.

Microwave heating is a capability of the material to absorb high-frequency electromagnetic energy and change over it to heat. Microwave heating is prompted due to chemical bonding and in presence of excessive frequency electric field, they’re realigned. Realignment arise million of time per second because of excessive frequency which causes inner friction of molecules inflicting volumetric heating of the material.

Using microwaves in material handling has many advantages over traditional methods.

  • To enhance the product quality, the material is heated volumetrically and processed at low temperature.
  • Energy absorption can vary according to the design of applicator and properties of the dielectric.
  • Instant check facility.
  • Deep penetration.
  • Because of high energy densities, energy expenditure is 70% less than other methods.
  • Environmental pollution is decreased due to the clean transfer of energy to the product.
  • Because of the high energy density, and then through absorption of the energy, 20% smaller system needed.
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Figure 1. Material Handling

The material absorbs the microwave energy in the course of microwave processing. Material turns into some of this energy to heat, and this heat causes an increase in temperature of the material. Then, inner of the material gets warmer than the surface of the material because the surface loses more heat to the surrounding. The feature has the capability to heat a big phase of material integrity. There are some advantages of the opposite thermal effect in microwave heating.

  • The material can be warmed quickly without superheating the surface.
  • Elimination of gases from the poriferous material without fracture
  • The quality of the product increases.
  • The new substance is synthesized.

Material processing by microwave heating has been tested with a lot of experimental and theoretical results and practice. As it can be seen from the above discussion, microwave heating is a promising option according to traditional material processing methods, because of reduced processing time, reduced production cost, high heating rates, and energy saving.