Porous ceramic of high heat conductivity was prepared by using SiC and Al(OH)₃ as main raw materials and was applied as oil carrier of smoke atomizer. Graphite and starch were added as pore-forming agents. Results exhibited that the mixture of two pore-forming agents has significant effect on apparent porosity and bending strength of the samples. The mixture of pore formers starch and graphite kept the porosity and remained the sample strength. The best comprehensive physical property was obtained by the additional pore-forming agent that was composed by starch of 40 wt % and graphite of 25 wt %. The oil absorption rate and bending strength met the requirements of porous ceramic as oil absorber. The phase compositions are SiC, SiO₂ and needle-like mullite after fired at 1325°C. The distribution of pores was uniform. Smoke atomizer was designed through the combination of porous ceramic and metal ceramic heater (MCH) disk. A simulation of heat conductivity involved in the smoke atomizer was carried out. Both computational simulation and experiment were taken to figure out the efficiency of gas generation by different porous ceramics.