| Abstract Scope |
Feasibility of preparing foamed ceramics using BFS and fly ash as main materials was proved. On this basis, sintering temperature, sintering time, type of foaming agent, dosage of fly ash and foaming agent were considered to optimize the preparation process. The results of preliminary orthogonal test showed that the significance order of factors is sintering temperature > type of foaming agent > dosage of fly ash > dosage of foaming agent > sintering time. Uniform design based on the result of orthogonal test shows that the porosity of foam ceramic increases first and then decreases between the sintering temperature of 1190℃~1210℃ and the fly ash content of 30%~50%. The porosity increases between the foaming agent content of 0.5%~3%. The preparation parameters with the highest foaming rate were the sintering temperature of 1200℃, 42.5% dosage of fly ash and 3% dosage of iron oxide ( as foaming agent ). |