Preparation of porous SiC ceramics by an infiltration technique

Dey, Atanu; Kayal, Nijhuma; Chakrabarti, Omprakash

doi:10.1016/j.ceramint.2010.09.022

Cited by 55 publications

(26 citation statements)

References 29 publications

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“…The change of DC249TM silicone resin/SiC mass ratio did not cause obvious influence on the phases of the samples. The phases in our samples are in accordance with that given by Dey et al [8]. But the quartz phase did not appeared, and the β-SiC phase was replaced by 4H-SiC and 6H-SiC reported by Bai et al [9], for a high sintering temperature at 2250˚C.…”

Section: Microstructuressupporting

confidence: 81%

See 1 more Smart Citation

Thermal Conductivity and Microstructure Properties of Porous SiC Ceramic Derived from Silicon Carbide Powder

Wu¹,

Ma²,

Chen³

et al. 2013

NJGC

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Porous SiC ceramic were prepared with silicon carbide powder as the aggregate, silicone resin as the binder and pore agent by the process of mixing, iso-static pressure molding, and calcination. The mechanical properties and microstructures of the samples were characterized with a universal testing machine, X-ray diffraction, scanning electron microscope, and mercury injection. Two main factors, molding pressures and silicone resin mass ratio were studied in the experiments. The thermal conductivity of the samples was tested. The compressive strength was up to 19.4 MPa, and the porosities up to 30%. The thermal conductivities, mainly influenced by porosities, increased from 0.68 W·m ·K−1 with the porosity decreasing from 41.96% to 31.30%.

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Section: Microstructuressupporting

confidence: 81%

“…Dey et al prepared porous SiC ceramic with good flexural strengths by an infiltration technique [8]. Bai et al used Fe 2 O 3 as pore-forming agent for preparation of SiC porous ceramic [9].…”

Section: Introductionmentioning

confidence: 99%

Thermal Conductivity and Microstructure Properties of Porous SiC Ceramic Derived from Silicon Carbide Powder

Wu¹,

Ma²,

Chen³

et al. 2013

NJGC

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“…The samples were weighed to determine the increase of mass due to the SiO 2 intake and to assess the infiltration behavior (percentage of mass increased). Finally, the infiltrated samples were sintered at 1,300°C for 4 h in a high-temperature furnace [22]. The final porous mullite-infiltrated ceramics were characterized by measurements of the microstructure of the infiltrated green bodies, which was observed by scanning electron microscopy, SEM (JEOL JSM-6060LV, 20 kV); previously, the samples were covered with four gold caps owing to the porosity of the material.…”

Section: Infiltrated Green Bodiesmentioning

confidence: 99%

Study of thermal properties of mullite porous materials

Saucedo-Rivalcoba

Landeros²,

Meneses

et al. 2015

J Therm Anal Calorim

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Green ceramic bodies based on mullite were infiltrated with SiO 2 (TEOS precursor) solution using a sol-gel technique and sintered at 1,300°C. Previously, the green bodies had been prepared with the molding method, using corn flour as the pore-forming agent with a concentration in mass percent of 10, 15, and 20, and then they were sintered. Infiltrated ceramic material was evaluated to determine the relationship between, morphology, porosity, thermal properties, and crystalline characteristics by scanning electron microscopy, X-ray diffraction, porosimetry by N 2 at 77 K, and thermal analysis using laser flash technique. The presence of SiO 2 together with magnesium (talc powder) gives a cordierite crystalline phase, which is considered presenting thermal stability. Infiltration process changes the surface area, which is reduced by 93 %, and the pore size value reaches 1.98 nm, changing from open to closed structure. In spite of porosity change, thermal conductivity increases in the majority of the samples. This phenomenon obeys the complex system involved in the study, such as closed porosity, microstructure, tortuosity, geometry, and the anisotropy of mullite bonds, accompanied by the infiltrant liquid (SiO 2 ).

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“…For example, porous ceramics based on silicon carbide (SiC) have recently received significant attention from researchers due to their excellent structural properties, high thermal shock resistance, high hardness, and mechanical and chemical stability, particularly at high temperatures and in harsh environments. Because of these properties, such materials have been considered promising candidates for use as catalyst supports, gas sensors, thermal insulators, and other related applications 9 . Because of their physicalchemical characteristics, porous ceramic materials can also be used in environmental applications, such as sensing and the remediation of effluents through selective adsorption of chemical species 10 , and in engineering processes as substitutes for metallic and polymeric materials, especially those used at high temperatures 11 …”

Section: Introductionmentioning

confidence: 99%

Structural and fluid dynamic characterization of calcium carbonate-based porous ceramics

et al. 2013

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The aim of this work was to experimentally evaluate the use of calcium carbonate as a poregenerating agent in ceramic compositions. Compositions that contained 50% kaolin, 20% limestone, and different concentrations of quartz and feldspar were prepared by uniaxial pressing. Samples were heat-treated at a heating rate appropriate to induce calcium carbonate degassing, and they were then sintered at 800, 900, and 1050 °C. Tests of X-ray fluorescence, thermogravimetric analysis, porosimetry, and air permeation were performed. The composition (wt%) that contained 50% kaolin, 20% limestone, 20% feldspar, and 10% quartz and heat treated at 1050 °C (k 1 = 1.73×10 -13 m 2 and k 2 = 1.00×10 -8 m) showed the highest level of permeability among the investigated samples. Fluid dynamics simulations showed that the prepared samples would exhibit a pressure drop greater than the range desired for applications that involve the filtration of aerosols, but alternatively would be suitable as substrates for asymmetric membranes in microfiltration applications.

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Preparation of porous SiC ceramics by an infiltration technique

Cited by 55 publications

References 29 publications

Thermal Conductivity and Microstructure Properties of Porous SiC Ceramic Derived from Silicon Carbide Powder

Thermal Conductivity and Microstructure Properties of Porous SiC Ceramic Derived from Silicon Carbide Powder

Study of thermal properties of mullite porous materials

Structural and fluid dynamic characterization of calcium carbonate-based porous ceramics

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