The feature

 and Applications of Silicon Carbide Ceramic Foam

Features of Silicon Carbide Ceramic Foam

Ceramic foam is a porous ceramic that looks like foam. Currently, the materials for preparing ceramic foam mainly include ZrO2, Si3N4, Al2O3, SiC, etc. The most common is silicon carbide ceramic foam, which is currently the most promising inorganic high-temperature material. So, in this article, let's take a look at the characteristics and applications of silicon carbide ceramic foam. 

The development of silicon carbide ceramic foam began in the 1970s. As a new inorganic non-metallic filter material with many pores in its internal structure, it has the advantages of a lightweight, high strength, high-temperature resistance, corrosion resistance, simple regeneration, long service life, and good filter adsorption.

1. Silicon carbide ceramic foam can be sintered and compacted under atmospheric pressure and can be compacted without high pressure and inert atmosphere, which reduces the production cost of enterprises.

2. Generally, adding suitable sintering aids reduces the sintering temperature of the silicon carbide ceramic foam. During normal pressure sintering, it can reduce the oxidation of SiC on the surface of the ceramic foam and improve the overall performance of the ceramic foam.

3. Silicon carbide ceramic foam is not easy to be corroded by acid and alkali when filtering liquid, and will not pollute the filtered metal liquid. In addition, after use, it can be reused without reducing filtration efficiency, which greatly reduces enterprise costs.

4. Its molding processing performance is also good. Diamond tools can easily cut it off, and diamond wheels can be used when grinding is needed. The silicon carbide ceramic foam can be easily processed into the required shape by changing the processing conditions.

Applications of Silicon Carbide Ceramic Foam

Catalyst Carrier

Silicon carbide ceramic foam has the advantages of higher porosity, thermal conductivity, mechanical strength, oxidation resistance, and corrosion resistance. Its surface is uneven and has many micropores. This special network structure greatly increases the contact area of the two phases. 

All these characteristics make silicon carbide ceramic foam become a new generation of catalyst carriers to replace traditional silica, alumina ceramics, and activated carbon.

Filters

Silicon carbide ceramic foam has the characteristics of low-pressure loss, heat resistance, thermal shock resistance, and high oil fume collection efficiency, making it very promising as a filter for diesel engine oil fume collectors.

Applications

The chemical foam ceramic filter is mainly used for the filter of iron and gray ceramics. It is mainly used for iron, gray, iron, copper and other non-ferrous non-ferrous metal alloys. It automatically reduces the degree of molten iron metal silicon ball flow in the engraving crossing and removes the effective metal. The large inclusions, fine structure of particles, reduce the content of gases and toxic elements in the molten metal, improve the mechanical properties of castings, improve the metal matrix, and are used to improve the quality of metal balls, gray iron, and iron castings.

Silicon Carbide Ceramic Foam Filter Strength Testing

The compressive strength is the key property to determine the quality of silicon carbide ceramic foam filter.Normally, for round shape filters, we test compressive strength. Bending strength is for square and rectangular size.