In-situ synthesis and properties of cordierite-bonded porous SiC membrane supports using diatomite as silicon source

Shi, Wei; Liu, Borui; Deng, Xiangyun; Li, Jianbao; Yang, Yixiao

doi:10.1016/j.jeurceramsoc.2016.05.035

Cited by 39 publications

(23 citation statements)

References 40 publications

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“…and the strength of the completely dense material (σ 0 ) and the value of constant (b) were calculated. The values of flexural strength obtained in this work are comparable with the reported values in literature [37][38][39]. 20 Bai et al reported variation in flexural strength between 15.6 and 54 MPa, porosity ~37-53 vol%, σ 0 = 1237.04 MPa and b = 8.16 for cordierite-mullite-bonded porous SiC F I G U R E 2 Pore size distribution patterns of multiple oxidebonded porous SiC ceramics sintered at different temperatures F I G U R E 3 XRD patterns of porous SiC ceramics showing multiple oxide phases ceramics.…”

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confidence: 91%

“…29 Shi et al obtained variation in flexural strength from 30.9 to 65 MPa for variation in porosity from 22 to 45 vol%, σ 0 = 132 MPa and b = 3.1 for cordierite-bonded porous SiC membrane supports prepared using diatomite, talc, and alumina in air at 1150-1400°C via reaction bonding technique 38. For the cordierite-bonded porous SiC ceramics, Liu et al obtained a variation in flexural strength of ~70-3 MPa for variation of porosity 28-66 vol%, σ = 501 MPa and b = 6.97.…”

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confidence: 99%

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Properties of multiple oxide‐bonded porous SiC ceramics prepared by an infiltration technique

Das

Baitalik

Kayal

2019

Int J Applied Ceramic Tech

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Multiple oxide‐bonded porous SiC ceramics were fabricated by infiltrating a porous powder compact of SiC and alumina with cordierite sol followed by sintering at 1300‐1400°C in air for 3 hours. The microstructures, phase components, mechanical properties, and air permeation behavior of the developed porous ceramics were examined and compared with materials obtained by the traditional powder processing route. The porosity, average pore diameter, and flexural strength of the ceramics varied from 33 to 37 vol%, ~12‐14 μm and ~23‐39.6 MPa, respectively, with variation in sintering temperature. The X‐ray diffraction results reveal that both the amount of cordierite and mullite as the binder increased with increase in sintering temperature. In addition, it was found that the addition of alumina in powder form effectively enhanced the strength due to formation of mullite in the bond phase in contrast to the samples prepared without alumina additive. To determine the suitability of the material in particulate filtration application, particle collection efficiency of the filter material was evaluated theoretically using single collector efficiency model.

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confidence: 91%

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confidence: 99%

Properties of multiple oxide‐bonded porous SiC ceramics prepared by an infiltration technique

Das

Baitalik

Kayal

2019

Int J Applied Ceramic Tech

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“…The flexural strength of Si 3 N 4 ‐bonded porous SiC ceramics was 29‐69 MPa at 33%‐37% porosity . The flexural strength of cordierite‐bonded porous SiC membrane supports was 25‐49 MPa at 38%‐46% porosity . The flexural strength of SiOC‐bonded porous SiC ceramics was 53‐82 MPa at 20%‐42% porosity .…”

Section: Resultsmentioning

confidence: 99%

“…Silicon carbide (SiC) is a promising membrane material for water treatment and hydrogen separation applications because of its excellent mechanical and chemical stability, high‐temperature corrosion resistance, high thermal conductivity, and high thermal shock resistance . Depending on the pore size of the separating media, membrane filtration can be classified as macrofiltration (>3 μm), microfiltration (0.1‐3 μm), ultrafiltration (1‐100 nm), nanofiltration (0.5‐1.5 nm), or reverse osmosis (<0.5 nm) .…”

Section: Introductionmentioning

confidence: 99%

“…In addition, these materials are vulnerable to densification and require high energy consumption when sintered at temperatures greater than 1700°C. Two processing routes are used to fabricate porous SiC ceramics at lower temperatures: the use of preceramic polymers as a precursor for SiC and the use of bonding materials . Mullite (3Al 2 O 3 ·2SiO 2 ), silica (SiO 2 ), silicon oxycarbide (SiOC), sodium borate, cordierite, and glass frit have been investigated as bonding materials for porous SiC ceramics.…”

Section: Introductionmentioning

confidence: 99%

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Processing of alumina‐coated glass‐bonded silicon carbide membranes for oily wastewater treatment

Kim

Yeom

Kim

et al. 2017

Int J Applied Ceramic Tech

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Crack‐free γ‐Al2O3‐coated glass‐bonded SiC membranes were successfully prepared using a simple heat‐treatment and dip‐coating process at a temperature as low as 850°C in air. The changes in the porosity, flexural strength, flux, and oil rejection rate of the membranes were investigated while changing the initial SiC particle size. Larger SiC particles led to bigger pores, resulting in higher flux in the oily water and a lower oil rejection rate. The SiC membranes with a support prepared from 10 μm SiC powder showed an exceptionally high oil rejection rate (99.9%) with a feed oil concentration of 600 mg/L at an applied pressure of 101 kPa. The typical porosity, flexural strength, steady state flux, and oil rejection rate of the alumina‐coated SiC membrane were ~45%, ~81 MPa, 1.78×10−5 m3 m−2s−1, and 99.9%, respectively.

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Mineral Modulated Single Atom Catalyst for Effective Water Treatment

Dong

Chen

Tang

et al. 2022

Adv Funct Materials

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Single atom catalysts (SACs) have been growing as an emerging "hot" topic in environmental remediation. Their performance can be rationally optimized via modulating spatial coordination configuration and the porous structure of SACs, which is still challenging. Herein, a novel Si, N co-coordinated cobalt SAC (p-CoSi 1 N 3 @D) with 3D free standing architecture is tailored via employing natural mineral (diatomite) as a Si source and porous template. Theoretical calculations and experimental analysis reveal that the substitution of N by Si dramatically accelerates the interaction and electron transfer between peroxymonosulfate and the Co single atom center. Moreover, p-CoSi 1 N 3 @D inherits the hierarchically porous architecture of diatomite, providing more accessible cobalt sites and open diffusion channels for peroxymonosulfate and contaminants in water treatment applications. Thanks to optimal coordination structure and porous architecture, p-CoSi 1 N 3 @D can serve as a highly active catalyst for peroxymonosulfate activation, with a turnover frequency of 299.8 min −1 for bisphenol A degradation, surpassing those of catalysts with transition metal SACs or oxides in the disclosed literature. This work provides a novel strategy for the development of SACs for wastewater reclamation, and deepens the understanding of the significant role of templates in spatial coordination configuration of SACs.

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In-situ synthesis and properties of cordierite-bonded porous SiC membrane supports using diatomite as silicon source

Cited by 39 publications

References 40 publications

Properties of multiple oxide‐bonded porous SiC ceramics prepared by an infiltration technique

Properties of multiple oxide‐bonded porous SiC ceramics prepared by an infiltration technique

Processing of alumina‐coated glass‐bonded silicon carbide membranes for oily wastewater treatment

Mineral Modulated Single Atom Catalyst for Effective Water Treatment

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