Investigate microwave absorption on formulated SiC/ Al2O3 composite porous susceptor

Electricity is the main cost of production in the manufacturing industry. Thus,
the best way is by optimum the energy consumption from the sources, use as much as
it can and shorter the time for the process which consume energy. Understand this
needs, susceptor usage in a microwave is the best alternative to absorb the energy
sources and convert the energy in less time. However, the commercially susceptor
which is SiC susceptor has low electromagnetic absorption which consume more
energy and high cost to produce since it is pure Silicon Carbide and need high sintering
temperature. In this studies, high electromagnetic absorption of SiC/Al2O3 composite
susceptor produced which enhanced electromagnetic absorption, lower the sintering
temperature that cut the cost of production so it can be use in domestic application.
The studies use different compositions of Alumina and Silicon Carbide as fillers which
are (10, 20, 30, 40 and 50 wt% Al2O3). The raw material, mixture and the sintered
composite were characterize in term of phase characterization, microstructure,
electromagnetic absorption and density and porosity to determine the best composition
to fabricate the SiC/Al2O3 composite susceptor. Result shows 50 wt% of Alumina be
able to reach 556°C within 12 minutes, and in term of microstructure, XRD also
density and porosity, it is ideal among the five composition. This ideal ratio uses for
the production of porous susceptor using 5 different pore size of sponge. The porous
structure able to absorb more energy from microwave rays. The sponge replication
method uses and this studies find the best pore size of sponge is 191.9523 μm. This
size reach up to 591°C.