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Research Article | Open Access

Preparation of hollow fiber membranes from mullite particles with aid of sintering additives

Hua LIUaJinyun LIUaZhou HONGbShengxian WANGaXuechao GAOa( )Xuehong GUa( )
State Key Laboratory of Materials-Oriented Chemical Engineering, College of Chemical Engineering, Nanjing Tech University, No. 30 Puzhu Road (S), Nanjing 211816, China
Nanjing Membrane Materials Industrial Technology Research Institute Co., Ltd., No. 1 Yuansi Road, Pukou Economic Development Zone, Nanjing 211808, China
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Porous mullite hollow fiber membranes were prepared with a combined phase-inversion and sintering method, using three sintering additives including yttrium stabilized zirconia (YSZ), small mullite particles (SMP), and titanium oxide (TiO2) to promote the particle sintering. The results indicated that all the three additives could improve the sintering performance of mullite hollow fiber membranes due to the decrease in activation energy of mullite grains. Both YSZ and TiO2 could react with mullite grains to generate composite oxides (e.g., ZrSiO4 and Al2TiO5) during sintering, following a reaction-sintering mechanism. Interestingly, the newly generated ZrSiO4 was instable and further decomposed into monoclinic ZrO2 and SiO2 in the sintering process. The decomposition could avoid excessive embedment of composite oxides among mullite grains which have negative impact on mechanical strength of mullite hollow fibers. Overall, the doping of YSZ provided a better promotion effect on the sintering of mullite hollow fiber membranes, where the microstructural and mechanical properties are insensitive to the doping content and sintering temperatures, so it could be used as the candidate for the large-scale preparation of mullite hollow fibers.


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Journal of Advanced Ceramics
Pages 78-87
Cite this article:
LIU H, LIU J, HONG Z, et al. Preparation of hollow fiber membranes from mullite particles with aid of sintering additives. Journal of Advanced Ceramics, 2021, 10(1): 78-87.








Web of Science






Received: 16 May 2020
Revised: 25 August 2020
Accepted: 04 September 2020
Published: 21 October 2020
© The Author(s) 2020

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