Porous silicon carbide ceramics with high open porosity and large pore size are usually applied as filters
for the cleaning of hot dust gases. However, the large porosity and large pore size will decrease the
mechanical properties. In the present study, porous SiC ceramics were prepared using bentonite as
bonding phase. The effects of sintering temperature on the microstructure and the compressive strength
were studied. Bentonite could melt and spread on the surface of silicon carbide particles at all the sintering
temperatures. However, the bonding effects were very different at different temperatures.