保温时间对黄土基陶瓷膜支撑体性能的影响

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摘要以洛川黄土为骨料,SDBS为烧结助剂,采用滚压成形法和固态粒子烧结法制备无机陶瓷膜支撑体。采用X射线衍射(XRD)、扫描电镜(SEM)、压汞法、三点弯曲法、质量损失法、自制纯水通量测定装置等对支撑体的物相变化、微观形貌、孔隙率、抗弯强度、酸碱腐蚀率、纯水通量进行分析表征,研究保温时间对支撑体性能的影响。结果表明：随保温时间增加,支撑体纯水通量先增大后减小,抗弯强度提高,耐腐蚀性增强,晶粒趋于成熟完整;经1 050 ℃烧结保温20 h后,支撑体的纯水通量为2 570.47 L/(m²·h·MPa)、抗弯强度为38.91 MPa、平均孔喉半径为2.39 μm,酸、碱腐蚀率分别为0.18%和0.17%,适宜用作水处理领域的无机陶瓷膜载体。

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	李大川
	同帜
	黄开佩
	王佳悦
	周广瑞

关键词 ：无机陶瓷膜, 支撑体, 黄土, 保温时间, 通量, 抗弯强度

Abstract：The inorganic ceramic membrane supports with Luochuan loess as aggregate, SDBS as sintering aid were prepared by extrusion-molding and solid particle sintering method. The effect of the holding time on the properties of ceramic membrane supports was mainly studied. The crystal phase, microscopic morphology, porosity, flexural strength, acid-base corrosion rate and pure water permeability of ceramic supports were characterized by testing methods such as X-ray diffraction (XRD), scanning electron microscopy (SEM), mercury intrusion method, three-point bending method, mass loss method, self-made pure water flux measurement device. The results show that with the holding time increasing, the pure water flux of the support increases first and then decreases, the bending strength continues to increase, the corrosion resistance increases gradually, the liquid phase increases gradually, and the grains tend to mature and complete. The pure water flux, flextural strength, average pore throat radius, acid and alkali corrosion rate of the support sintered at 1 050 ℃ for 20 h are 2 570.47 L/(m²∙h∙MPa), 38.91 MPa, 2.39 μm, 0.18% and 0.17% respectively, indicating that the support can be used as an inorganic ceramic membrane carrier for use in the field of water treatment.

Key words： inorganic ceramic membrane supports loess holding time pure water permeability flexural strength

收稿日期: 2019-10-10 出版日期: 2020-06-19

ZTFLH:

TQ174

基金资助:陕西省科技厅重点研发计划-重点项目(2018ZDXM-SF-094)

通讯作者: 同帜,教授级高级工程师。电话：13892835352;E-mail: 1018915428@qq.com

引用本文:

李大川, 同帜, 黄开佩, 王佳悦, 周广瑞. 保温时间对黄土基陶瓷膜支撑体性能的影响[J]. 粉末冶金材料科学与工程, 2020, 25(1): 79-85.
LI Dachuan, TONG Zhi, HUANG Kaipei, WANG Jiayue, ZHOU Guangrui. Effect of holding time on properties of loess-based inorganic ceramic membrane supports. Materials Science and Engineering of Powder Metallurgy, 2020, 25(1): 79-85.

链接本文:

http://pmbjb.csu.edu.cn/CN/ 或 http://pmbjb.csu.edu.cn/CN/Y2020/V25/I1/79

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