High-strength thermal insulating porous mullite fiber-based ceramics

Qin, Zheng; Xu, Xiaojing; Xu, Tao; Cao, Yueqi; Wu, Jin‐Bin; Yan, Liwen; Hou, Feng; Liu, Jiachen; Guo, Anran

doi:10.1016/j.jeurceramsoc.2022.08.050

Cited by 35 publications

(22 citation statements)

References 43 publications

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“…It must be mentioned that the bulk densities obtained in this work fall within the recommended values for structural applications according to ASTM C469 30 . Generally, a bulk density decrease with a corresponding strength reduction has been reported 12,23 . It is reported that the strength of mullite is affected by quartz or glass in grain boundaries 16 .…”

Section: Resultssupporting

confidence: 74%

“…The compressive strength values recorded in this work are comparable to values reported in Ref. [23], where high-strength thermal insulating porous mullite ceramics were produced. A reduction in bulk density also saw a reduction in the thermal conductivity of the porous mullite bricks produced.…”

Section: Influence Of Composition On the Properties Of Refractory Brickssupporting

confidence: 88%

“…Kaolin clay had the smallest average grain size, followed by WTS and lithomargic clay. The finer the particle size, the lower the mullitization temperature 23 . Due to the floc formulation of WTS, it has organic content, which becomes difficult to separate into individual solid particles when conducting particle size analysis.…”

Section: Resultsmentioning

confidence: 99%

“…The finer the particle size, the lower the mullitization temperature. 23 Due to the floc formulation of WTS, it has organic content, which becomes difficult to separate into individual solid particles when conducting particle size analysis. The behavior of the PSD curve can be attributed to the insufficient disintegration of soil clumps in preparing for the PSD analysis.…”

Section: Characterization Of Soil Samplesmentioning

confidence: 99%

“…30 Generally, a bulk density decrease with a corresponding strength reduction has been reported. 12,23 It is reported that the strength of mullite is affected by quartz or glass in grain boundaries. 16 The XRD results indicated that the WTS was amorphous in nature and had quartz and other impurity content.…”

Section: Influence Of Composition On the Properties Of Refractory Bricksmentioning

confidence: 99%

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Fabrication of porous mullite‐based ceramic bricks from Al‐rich water treatment sludge and kaolinitic‐based clay

Darkwa

Andrews

Darko

et al. 2023

Int J Applied Ceramic Tech

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A large quantity of water treatment sludge (WTS) is generated yearly from Ghana's Weija water treatment plant. The sludge contains some heavy metals and other toxic chemicals, which must be managed to minimize environmental impact. In the current work, WTS was mixed with varying quantities of kaolinitic-based clays (kaolin and lithomargic clays) to produce porous mullitebased bricks. The bricks were fired at 1200 • C for 1 h, and their properties were determined. Lithomargic clay-based mixtures had less dimensional variation and were suitable to produce near-net shape bricks compared to WTS-based bricks. The addition of WTS increased the linear firing shrinkage and apparent porosity whilst decreasing bulk density and compressive strength. Porous mullite-based bricks fabricated from lithomargic clay exhibited high compressive strength (6.3 MPa) at 10 wt.% WTS addition. The highest apparent porosity of 27% was attained at 40 wt.% WTS addition with compressive strength of 5.1 MPa and thermal conductivity of .5 W/m K.

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Section: Resultssupporting

confidence: 74%

Section: Influence Of Composition On the Properties Of Refractory Brickssupporting

confidence: 88%

Section: Resultsmentioning

confidence: 99%

Section: Characterization Of Soil Samplesmentioning

confidence: 99%

Section: Influence Of Composition On the Properties Of Refractory Bricksmentioning

confidence: 99%

See 3 more Smart Citations

Fabrication of porous mullite‐based ceramic bricks from Al‐rich water treatment sludge and kaolinitic‐based clay

Darkwa

Andrews

Darko

et al. 2023

Int J Applied Ceramic Tech

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Perspectives Toward Damage‐Tolerant Nanostructure Ceramics

Fan,

Wen,

Chen

et al. 2024

Advanced Science

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Advanced ceramic materials and devices call for better reliability and damage tolerance. In addition to their strong bonding nature, there are examples demonstrating superior mechanical properties of nanostructure ceramics, such as damage‐tolerant ceramic aerogels that can withstand high deformation without cracking and local plasticity in dense nanocrystalline ceramics. The recent progresses shall be reviewed in this perspective article. Three topics including highly elastic nano‐fibrous ceramic aerogels, load‐bearing nanoceramics with improved mechanical properties, and implementing machine learning‐assisted simulations toolbox in understanding the relationship among structure, deformation mechanisms, and microstructure‐properties shall be discussed. It is hoped that the perspectives present here can help the discovery, synthesis, and processing of future structural ceramic materials that are insensitive to processing flaws and local damages in service.

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