膜科学与技术

中温制备高性能莫来石质陶瓷膜支撑体

作者：张利剑，汪永清，胡学兵，张小珍，常启兵，徐泽跃

单位： 1.景德镇陶瓷大学江西省高等学校无机膜重点实验室，江西景德镇 333001；

关键词：电熔莫来石；粉煤灰；支撑体

出版年,卷(期):页码： 2020,40(4):107-112

摘要：

以电熔莫来石为主要原料，粉煤灰为烧结助剂，采用干压成型技术制备出了莫来石质陶瓷膜支撑体。系统研究了烧成温度对试样物相组成，显微结构及耐酸碱性能的影响。结果表明，当莫来石质量分数为85%，粉煤灰质量分数为15%，在 1350℃烧结制得的支撑体整体性能最佳，孔隙率为37.15%，平均孔径为2.31 μm，抗弯强度为59.85 MPa，纯水渗透率为14.5 m3·m-2 ·h-1 ·MPa-1。该陶瓷膜支撑体分别在15%的HCl溶液和NaOH溶液中腐蚀40 h后抗弯强度衰减为55.65MPa和47.72MPa，具有良好的耐化学腐蚀性能。

The mullite ceramic support was prepared by a pressing method using capacitor mullite powder as a starting material, coal fly ash as sintering additive and activated.The effectsof sintering temperature on phase composition, microstructure and chemical resistance of the samples were systematically studied. The results show that the best support with mullite of 85 wt% , coal fly ash of 15 wt% sintered at 1350℃has a porosity of 37.15%, a mean pore size of 2.31 μm,a flexural strength of 59.85 MPa, a water flux of 14.5 m3·m-2 ·h-1 ·MPa-1. The flexural strength decreases from 59.85 to 55.65 MPa and 47.72 MPa when the support immerses in 15% HCl and 15% NaOH for 40 h respectively. The support hasgood chemical corrosion resistance.

第一作者简介：张利剑（1995-02-01），男，河北张家口人，硕士研究生，主要研究方向为陶瓷膜及其应用，E-mail:390333373@qq.com 通讯作者：汪永清，E-mail:wyq8248@126.com 通讯作者：胡学兵，E-mail:xuebinghu2010@gmail.com

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