Ceramic foam is one kind of filter which is required to remove the impurities and improve quality of the final products. The ceramic foam need to be subjected to high temperature and a corrosive condition.
Filters can have either open cells or closed cells. Open cell (reticulate) filters consist of a network of interconnected voids surrounded by a web of ceramic and are widely used for molten metal filtration. Closed cell filters (foams) consist of a similar network but the beams are bridged by thin faces which isolate the individual cell. The open porosity in an open cell structure is critical in filter applications. The properties of a filter depend on both the cellular geometry (density, cell size) and the properties of the material. Advantages include high temperature stability and low weight.
Ceramic Foam filter drying play an important role in the whole process. There is high moisture content and multiple cells in the initial primary ceramic foam, and the cell is very thin. Therefore, the traditional drying solution could not uniformly dry the ceramic foam production. On the other hand, the ceramic foam or honeycomb ceramic is poor heat conductivity, difficult control drying process, easily deformed and affect the rate of cell and surface area.
Ceramic filters will continue to play an important role in producing quality castings and will follow the growth of the casting market. Thus, casting buyers are specifying "filtered" more and more often. Microwave drying the ceramic foam can significantly reduce the drying time and improve the ceramic foam filter quality. For your ceramic foam drying project, please contact with MAX Industrial Microwave.