多孔吸水陶瓷材料的研制

Development of Porous Absorbent Ceramic Material

以四川攀枝花红格的高岭土为主要坯体原料,制备高孔隙率多孔吸水陶瓷材料。采用添加造孔剂工艺,用正交试验优化配方和工艺参数,讨论了烧结制度、造孔剂含量对多孔吸水陶瓷材料的显微结构、显气孔率及抗压强度的影响。实验结果表明:造孔剂种类对多孔吸水陶瓷性能影响最大,烧结温度次之,最后是高岭土的含量。当造孔剂种类为木炭,高岭土质量分数为75%,氧化铝质量分数为25%,造孔剂质量分数为45%,成型压力为20MPa,烧结温度为1 200℃,保温1 h,制得的多孔吸水陶瓷材料密度为1.128 g/cm^(3),抗压强度为3.27 MPa,显气孔率为49.87%,吸水率为44.03%。

Using the kaolin of Hongge in Panzhihua, Sichuan Province as the main raw material, the porous water-absorbing ceramic material with high porosity was prepared. The effects of sintering system and poreforming agent content on the microstructure, apparent porosity and compressive strength of porous water-absorbing ceramic materials were discussed by using the process of adding pore-forming agent and orthogonal test to optimize the formula and process parameters. The experimental results showed that the type of pore-forming agent had the greatest influence on the properties of porous water-absorbing ceramics, followed by the sintering temperature,and finally the content of kaolin. When the type of pore-forming agent was charcoal, the mass fraction of kaolin was 75%, the mass fraction of alumina was 25%, the mass fraction of pore-forming agent was 45%, the molding pressure was 20 MPa, the sintering temperature was 1 200 ℃, and the insulation time was 1 h, the density of the porous water-absorbing ceramic material was 1.128 g/cm^(3), the compressive strength was 3.27 MPa, the apparent porosity was 49.87%, and the water absorption rate was 44.03%.