Mechanical strength of highly porous ceramic foams with thin and lamellate cell wall from particle-stabilized foams

Huo, Wenlong; Zhang, Xiaoyan; Chen, Yugu; Wang, Dong; Liu, Jingjing; Yan, Shu

doi:10.1016/j.ceramint.2017.11.202

Cited by 45 publications

(19 citation statements)

References 18 publications

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“…Until now, hierarchical porous architectures have been successfully synthesized by employing the following technological routes: (a) Preparation of hierarchical porous composites by coating of mesoporous or microporous frameworks onto much open porous substrates; (b) Template‐directed method which uses the inherent pore structure of sacrificial templates to generate hierarchical porous frameworks after imprinting processes . Particle‐stabilized foams are particularly attractive and simple templating processes which have been largely reported in recent years . Despite their striking advantages, hierarchical structuring of porous materials using this method still remains a challenging scientific task since the pore‐size distributions of as‐prepared ceramics are usually homogeneous …”

Section: Introductionmentioning

confidence: 99%

Three‐dimensional (3D) flexible nanofibrous network knitting on hierarchical porous architecture

et al. 2018

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Hierarchical structured porous ceramics have attracted tremendous research interests because of their numerous excellent properties including robust mechanical strength and large surface area. In this work, silicon carbide (SiC)-based porous ceramics with three levels of pore hierarchy are fabricated from silicon particlestabilized foams and a subsequent one-step calcination after they were embedded with coke. Three-dimensional (3D) flexible nanofibrous network is adhered and wrapped on cell walls of porous ceramics, which is readily fine-tuned and tailored by the temperature to provide optimized pore structure. The resultant SiC-based porous ceramics present a density of 1.03 g/cm 3 at a porosity of 72% with a large quantity of hierarchical micro-and macropores. This hierarchical structure leads to robust compressive strength (23.52 MPa) and large surface area (64.32 m 2 /g). The fabrication method is straightforward and sought-after, providing a facile technical route for advanced hierarchical porous ceramics used in filtration and catalysis fields.flexible nanofibrous network, hierarchical porous architecture, mechanical properties, particle-stabilized foam, porous ceramics

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Section: Introductionmentioning

confidence: 99%

Three‐dimensional (3D) flexible nanofibrous network knitting on hierarchical porous architecture

et al. 2018

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“…As shown in Figure 9, the compressive strength of alumina ceramic foams is higher than those achieved by most existing methods 14,16,17,[32][33][34][35][36][37][38][39][40][41][42][43][44] with similar porosity. This occurrence can be explained by the following reasons: (a) Small grain size.…”

Section: Compressive Strengthmentioning

confidence: 85%

Ultrahigh‐strength alumina ceramic foams via gelation of foamed boehmite sol

et al. 2019

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Ceramic foams with significant porosity and robust mechanical properties have received extensive attentions. However, it is still difficult to achieve excellent compressive strength at high porosity levels. In this work, a gelation of foamed boehmite sol method is proposed to settle this issue. The technological parameters during preparation process are systematically investigated. As‐prepared alumina ceramic foams possess unprecedentedly high compressive strength of 34.1‐89.1 MPa at high porosity levels of 66.0%‐87.2%, which is attributed to the present of hierarchical pore structure, small grain size and pore size. This work demonstrates a facile and novel method for the fabrication of high‐performance alumina ceramic foams toward practical applications.

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“…References have pointed out that the mechanical strength of porous ceramics was exponential correlation with the porosity. [37][38][39] An equation firstly given by Ryshkewwitch 40 and developed by Rice, 41,42 was widely used to describe the mechanical strength-porosity behavior, is expressed below:…”

Section: Mechanical Strengths Of the Samplesmentioning

confidence: 99%

Use of steel slag and quartz sand‐tailing for the preparation of an eco‐friendly permeable brick

Liu

Lin

et al. 2019

Int J Applied Ceramic Tech

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In order to effectively utilize industrial solid wastes (ISW), an eco-friendly permeable brick was successfully prepared by using quartz sand-tailing and steel slag. The influence of sintering temperature on the properties including permeability, apparent porosity, water absorption, bulk density, mechanical strengths, and chemical stability was systematically investigated. The research results show that with increasing sintering temperature, the structure of the permeable brick gradually become dense, which may be due to liquid phase sintering caused by a small amount of glass-liquid phase (Ca-Fe-Si-Al-O glass system). The permeability, apparent porosity, and water absorption decrease gradually, while the bulk density and mechanical strengths increase monotonously. Furthermore, the best sintering schedule for the permeable brick is 1320°C for 1 hour, with the optimized parameters, the permeable brick exhibits excellent properties (permeability, 3.65 × 10 −2 cm/s; compressive strength, 34.1 MPa; bending strength, 5.2 MPa; chemical stability, above 99%), wherein the permeability is far beyond Chinese standard (1 × 10 −2 cm/s). The permeable brick in this work provides a promising way for the recycle of ISW. Even better, it can maximize the introduction of quartz sand-tailing and steel slag (reach 100%) and create huge economic benefits while protecting environment. K E Y W O R D S mechanical strengths, permeability, permeable brick, quartz sand-tailing, steel slag How to cite this article: Liu J, Li C, Lin C, et al. Use of steel slag and quartz sand-tailing for the preparation of an eco-friendly permeable brick.

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Mechanical strength of highly porous ceramic foams with thin and lamellate cell wall from particle-stabilized foams

Cited by 45 publications

References 18 publications

Three‐dimensional (3D) flexible nanofibrous network knitting on hierarchical porous architecture

Three‐dimensional (3D) flexible nanofibrous network knitting on hierarchical porous architecture

Ultrahigh‐strength alumina ceramic foams via gelation of foamed boehmite sol

Use of steel slag and quartz sand‐tailing for the preparation of an eco‐friendly permeable brick

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