Preparation of ZrO2 fiber modified Al2O3 membrane supports with enhanced strength and permeability
Preparation of ZrO2 fiber modified Al2O3 membrane supports with enhanced strength and permeability
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DOI：
10.1016/j.jeurceramsoc.2018.12.009
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发表时间：
2019-04
影响因子：
5.7
通讯作者：
Weiya Zhu;Yang Liu;Kang Guan;Cheng Peng;Jianqing Wu
中科院分区：
文献类型：
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作者：
Weiya Zhu;Yang Liu;Kang Guan;Cheng Peng;Jianqing Wu
本文通过引入氧化锆纤维(ZrO_2(F))制备了透气性和强度均有提高的Al_2O_3膜支撑体。研究了ZrO2(F)含量和烧结温度对载体的开孔率、干缩率、微观结构、透水性、抗弯强度和孔径的影响。结果表明，除纤维增强外，ZrO2(F)还可以通过改变孔形态和降低流动阻力来提高材料的开孔率和渗透率。但是，过高的烧结温度会破坏多孔结构。与未添加的样品相比，添加4 wt%的4 (F)在1550 °C下烧结的载体的抗弯强度和透水性分别提高了261%和52%。改进后的支架满足了更苛刻的操作条件的要求，可以达到最终产品小型化、轻量化的目的。
In this paper, Al2O3membrane support with both enhanced permeability and strength was fabricated by introducing zirconia fiber (ZrO2(f)). Effects of the ZrO2(f)content and sintering temperature on the open porosity, shrinkage rate, microstructure, water permeance, bending strength and pore size of the support were investigated. Results reveal that apart from fiber reinforcement, ZrO2(f)was found to promote open porosity and permeability by changing pore morphology and reducing flow resistance. However, it damages the porous structure if the sintering temperature is excessive. Compared with the un-added sample, the bending strength and water permeance of the support with a ZrO2(f)addition of 4 wt% sintered at 1550 °C increased by 261% and 52%, respectively. The modified support meets the requirement for more demanding operation conditions and may achieve the objects of miniaturizing and lightening the final products.