Porous cordierite ceramics were fabricated by pore forming agent method from high-magnesium nickel slag sintered at 1100°C~1380°C for 2h. The rice husk, Fe2O3 and starch were used as pore forming materials. The characterization was focused on phase evolution and microstructures using XRD and SEM. The flexural strength, open porosity and thermal expansion coefficient (TEC) were investigated in detail. XRD confirmed that a significant improvement in the cordierite formation at 1300°C, whereas the sintering process at 1200°C was insufficient. The SEM observation showed that the sample sintered at 1380°C was relatively porous. Compare to 30wt rice husk sample, the open porosity (37.53~40.26) of 20wt rice husk and 10wt starch sample exhibited a slightly increase and TEC (1.75x10-6/°C~3.12x10-6/°C) was lower, without significant reduction of the flexural strength (20.12MPa~23.32 MPa), as the sintering temperature changed from 1300°C to 1380°C, which made it desirable candidate as adsorption materials.
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