高温陶瓷纤维膜材料的制备及影响因素分析

Preparation and Influence Factor Analysis of High Temperature Ceramic Fiber Membrane Materials

本文以多晶莫来石纤维、SiO2/B2O3体系结合剂为主要原料,采用真空旋转抽滤成型工艺,制备了高温陶瓷纤维膜材料,研究了浆料性能、结合剂加入量、成型压力对陶瓷纤维膜材料各项性能的影响。实验结果表明:浆料粘度、结合剂量及成型压力对纤维膜材料的性能有显著影响。当浆料的粘度为2000 mPa×s^2500 mPa×s、结合剂含量为39 wt%~42 wt%、成型压力为-0.04 MPa时,可获得均匀结构的陶瓷纤维过滤材料。材料气孔率大于88%,透气阻力为82 Pa,抗压强度为1.75 MPa,可几孔径为90μm。

In this paper,high-temperature ceramic fiber membrane materials was fabricated by vacuum rotary filtration molding process using polycrystalline mullite fiber and SiO2/B2O3 system binder as the main raw materials.The effects of slurry performance,binder addition amount and molding pressure on the properties of ceramic fiber membrane materials were studied.It was shown that the slurry viscosity,combined with dosage and molding pressure has a significant influence on the performance of the fiber membrane material.With the viscosity of the slurry of 2000 mPa×s^2500 mPa×s,binder content in fiber membrane materials of about 39 wt%~42 wt%,the molding pressure of-0.04MPa,the uniform structure of ceramic fiber filter material was obtained,with porosity greater than 88%,breathable resistance of 82Pa,compressive strength of 1.75MPa and the most probable pose size of 90μm.