环氧树脂含量对激光选区烧结制备多孔煤系高岭土陶瓷性能的影响

Effect of Epoxy Resin Content on Properties of Porous Coal Series Kaolin Ceramics Prepared by Selective Laser Sintering

目前,我国对煤系高岭土资源的整体深加工技术水平较低,导致了资源浪费和环境污染。本文分别以煅烧煤系高岭土和环氧树脂为原料和粘结剂,利用激光选区烧结工艺制备多孔煤系高岭土陶瓷,研究了环氧树脂含量对多孔煤系高岭土陶瓷性能的影响。研究表明,制备的多孔煤系高岭土陶瓷主要物相为莫来石和方石英,其孔隙分布均匀。随着环氧树脂质量分数从10%增大到25%,多孔煤系高岭土陶瓷素坯的抗弯强度由0.17 MPa增大到0.32 MPa,多孔煤系高岭土陶瓷的抗弯强度由2.81 MPa减小到0.82 MPa,其气孔率由50.37%增大到59.69%。以煤系高岭土为原料,采用激光选区烧结工艺制备多孔陶瓷对煤系高岭土资源的开发利用具有较为重要的意义。

At present,the low level of kaolin resources deep processing technology in China leads to the resources waste and environmental pollution.In this paper,epoxy resin and coal series kaolin powder were used as the binder and raw materials,respectively,and porous coal series kaolin ceramics were prepared by selective laser sintering(SLS).The effect of epoxy resin content on the properties of porous coal series kaolin ceramics were investigated.The results show that the main phases of porous coal series kaolin ceramics with evenly distributed pores are mullite and cristobalite.With a increase of epoxy resin mass content from 10%to 25%,it is found that the bending strength of porous coal series kaolin ceramic green parts increases continuously from 0.17 MPa to 0.32 MPa,the bending strength of porous coal series kaolin ceramics decreases from 2.81 MPa to 0.82 MPa,and the porosity increases from 50.37%to 59.69%.The preparation of porous ceramics from coal series kaolin by SLS is of great significance to the development and utilization of coal series kaolin resources.