Preparation of mullite whisker reinforced SiC membrane supports with high gas permeability

Xu, Xin; Liu, Xing; Wu, Jianfeng; Zhang, Chen; Zhang, Qiankun; Tian, Kun

doi:10.1016/j.ceramint.2020.11.171

Cited by 21 publications

(5 citation statements)

References 56 publications

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“…Xu et al. found the permeability coefficient k 1 and k 2 6.18×10 −9 m 2 and 1.50×10 −3 m respectively for the mullite bonded porous SiC ceramic membrane sintered at 1450°C with porosity 43.30 vol% 47 . Han et al.…”

Section: Resultsmentioning

confidence: 99%

“…46 Xu et al found the permeability coefficient k 1 and k 2 6.18×10 −9 m 2 and 1.50×10 −3 m respectively for the mullite bonded porous SiC ceramic membrane sintered at 1450 • C with porosity 43.30 vol%. 47 Han et al reported the air permeability coefficient value k 1 of 1.64×10 −11 m 2 for the porous SiC membrane reinforced with 4 wt% mullite fibers having open porosity of 46.8 %. 48 The higher permeability coefficient value of the membrane prepared in this work compared to the reported membrane indicated strong application possibilities in hot gas cleaning.…”

Section: Permeation Characteristics Of the Membranesmentioning

confidence: 99%

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Influence of additive contents on the properties of SiC ceramic membranes and their performance in oil‐water separation

Das

Kayal

2023

Int J Applied Ceramic Tech

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The high processing cost is the key challenge for the economic industrial use of SiC membrane The aim of this research was to fabricate mullite bonded porous SiC ceramic membrane at low temperature from novel combinations of fly ash and alumina (FA) in weight ratio 44.5:55.5 as sintering additives. The influences of FA and pore former content on the porosity, morphology, crystalline phase composition, mechanical performance, permeability properties were investigated. The membrane prepared at 1300 • C using 20 wt% FA showed pure water permeability 3690 Lm −2 h −1 bar −1 and exhibited high oil removal efficiency of ∼ 98% from the synthetic oil-water emulsion having oil concentration of 1000 mg/L. The corrosion behaviour of silicon carbide membrane in the strong acid and alkali solution and its mechanism were investigated. The utilization of fly ash successfully reduced the raw material cost and sintering temperature and the use of alumina reduced the amount of oxidation of SiC as well as increased the amount of mullite bond phase which resulted excellent mechanical strength to the final ceramics.

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Section: Resultsmentioning

confidence: 99%

Section: Permeation Characteristics Of the Membranesmentioning

confidence: 99%

Influence of additive contents on the properties of SiC ceramic membranes and their performance in oil‐water separation

Das

Kayal

2023

Int J Applied Ceramic Tech

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“…The trade-off between the mechanical strength and porosity is well recognized in the field of porous ceramics, and attempts have been increasingly devoted to overcome the issue [13]. Among them, introducing ceramic fibers or whiskers has been demonstrated as an effective way to improve both the mechanical strength and porosity of porous ceramics [14,15]. However, the cost of these whiskers is usually high and the reinforce effect would be discounted once these whiskers were not uniformly mixed.…”

Section: Introductionmentioning

confidence: 99%

A reverse particle grading strategy for design and fabrication of porous SiC ceramic supports with improved strength

Liang,

Zhang,

et al. 2024

Journal of Advanced Ceramics

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Porous ceramics usually requires high mechanical strength and maximized porosity simultaneously, while for conventional particle grading strategy it is highly challenging to meet both demands. To this end, a reverse particle grading strategy was developed based on the linear packing J u s t A c c e p t e d 2 model by unusually introducing coarse particles (d50 = 16 μm) into fine particles (d50 = 5 μm) matrix.Followed by the extrusion and sintering process, tubular porous SiC ceramic supports with improved mechanical strength were successfully fabricated. Effects of coarse particles on the rheology properties of the ceramic paste, and macroscopic properties and microstructure of SiC supports were systematically investigated. With the increasing content of coarse SiC particles to 30 wt%, the pressure generated in extrusion decreased from 5.5 ± 0.2 MPa to 1.3 ± 0.1 MPa. Notably, the bending strength of tubular supports increased from 36.6 ± 5.6 MPa to 49.1 ± 4.5 MPa when incorporating 20 wt% of coarse powders. The notable improved mechanical strength was attributed to the distribution of coarse particles that prolonged the route of crack deflection. Also, the optimized tubular supports showed an average pore size of 1.2 ± 0.1 μm and open porosity of 45.1 ± 1.6 % and water permeability of 7163 ± 150 L•m -2 •h -1 •bar -1 and good alkali and acid corrosion resistances. Significantly, the strategy was proved to be feasible in the scale-up fabrication of 19channel SiC tubular porous ceramic supports.

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“…Hua et al [ 19 ] successfully obtained mullite whiskers by sintering at 1350 °C for 1 h using construction waste and Al 2 O 3 powder as raw materials by adding a total of 12 wt% AlF 3 and 4 wt% MoO 3 . Xu et al [ 20 ] used an in situ bonding technique with silicon carbide particles as the skeleton material, fine kaolin and α-Al 2 O 3 powder as the binder, activated carbon as the pore-forming agent and MoO 3 as the additive at 1350 °C. The mullite-whisker-reinforced porous silicon carbide film scaffolds were prepared by pressureless sintering at 1520 °C.…”

Section: Introductionmentioning

confidence: 99%

Analysis of Influencing Factors in the Preparation of Mullite Whiskers from Recovering Silicon-Rich Waste under Low-Temperature Conditions

Chen

Wang

et al. 2023

Nanomaterials

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A large amount of catalyst waste containing silicon is deposited or buried every year, resulting in serious environmental pollution and a waste of resources. In this paper, a method to prepare mullite whiskers by recycling silica-rich waste under low-temperature conditions was investigated. The effects of raw materials, sintering temperature, catalyst addition, holding time and co-solvent addition on the structure, morphology and phase transition of the synthesized whiskers were investigated and characterized with SEM, XRD, TEM, TG and DTA. The results show that the addition of 10% Na2SO4 as the liquid-phase mass transfer medium could effectively improve the crystallization efficiency of mullite whiskers, while providing an ideal living environment for the growth of whiskers. The crystallinity and uniformity of mullite were positively correlated with the addition of aluminum fluoride trihydrate and the holding time, respectively. The growth law and conditions of mullite whiskers are discussed, and the optimal growth process conditions of mullite whiskers were optimized. The optimal conditions for mullite whiskers were determined as follows: the addition of aluminum fluoride is 5 wt%, the sintering temperature is 825 °C, and the holding time is 5 h at the time of sintering. This work offers new prospects for the industrial production of mullite whiskers from recycled silica-rich waste.

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Preparation of mullite whisker reinforced SiC membrane supports with high gas permeability

Cited by 21 publications

References 56 publications

Influence of additive contents on the properties of SiC ceramic membranes and their performance in oil‐water separation

Influence of additive contents on the properties of SiC ceramic membranes and their performance in oil‐water separation

A reverse particle grading strategy for design and fabrication of porous SiC ceramic supports with improved strength

Analysis of Influencing Factors in the Preparation of Mullite Whiskers from Recovering Silicon-Rich Waste under Low-Temperature Conditions

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