Journal ArticleDOI
Porous Silicon Carbide Sintered Substrates for High-Temperature Membranes
Varaporn Suwanmethanond,Edward Goo,Paul K. T. Liu,George Johnston,Muhammad Sahimi,Theodore T. Tsotsis +5 more
TLDR
In this article, the porosity, pore size distribution, and transport characteristics of the resulting SiC-sintered bodies depend on the nature of the original powder, the particle size in the green SiC samples, and the type and molar ratio of the sintering aid utilized.Abstract:
Silicon carbide (SiC) porous substrates are prepared by pressureless sintering of SiC powders under an inert atmosphere of argon. The porous SiC substrates were characterized by measuring their porosity, pore size distribution, surface characteristics, and structure. Their transport characteristics were investigated using N2 and He as the test gases. Three different starting powders and four different sintering aids, Al2O3, B4C, carbon black, and phenolic resin, either by themselves or in combination, were investigated in terms of their ability to prepare good quality substrates. It was found that the porosity, pore size distribution, and transport characteristics of the resulting SiC-sintered bodies depend on the nature of the original powder, the particle size in the green SiC samples, and the type and molar ratio of the sintering aid utilized. Depending on the preparation technique, both mesoporous and macroporous materials could be prepared. These supports are currently utilized for the preparation of...read more
Citations
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Journal ArticleDOI
Processing and properties of macroporous silicon carbide ceramics: A review
TL;DR: Macroporous silicon carbide is widely used in various industrial applications including filtration for gas and water, absorption, catalyst supports, concentrated solar power, thermoelectric....
Journal ArticleDOI
Click Synthesis of Monolithic Silicon Carbide Aerogels from Polyacrylonitrile-Coated 3D Silica Networks
TL;DR: In this article, the synthesis of monolithic highly porous (70% v/v) SiC by carbothermal reduction (1200−1600 °C) of 3D sol−gel silica nanostructures (aerogels) conformally coated and cross-linked with polyacrylonitrile (PAN) is described.
Journal ArticleDOI
Processing and properties of polysiloxane-derived porous silicon carbide ceramics using hollow microspheres as templates
TL;DR: In this paper, hollow microspheres as sacrificial templates were used to synthesize porous SiC ceramics from carbon-filled polysiloxane using hollow micro spheres.
Journal ArticleDOI
Silicon carbide membranes for gas separation applications
TL;DR: In this paper, a combination of slip-casting and dip-coating techniques was used on tubular silicon carbide macroporous supports to produce high quality microporous membranes, which exhibited an ideal H2/CO2 selectivity in the range of 42-96.
Journal ArticleDOI
Microstructural Characterization of Porous Silicon Carbide Membrane Support With and Without Alumina Additive
Manabu Fukushima,You Zhou,Hiroyuki Miyazaki,Yu-ichi Yoshizawa,Kiyoshi Hirao,Yuji Iwamoto,Satoshi Yamazaki,Takayuki Nagano +7 more
TL;DR: The relationship between processing factors and pore size and microstructure was examined in this article, where the CIP pressure and the amount of additive used were found to be effective for controlling pore sizes and micro-structure.
References
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Journal ArticleDOI
The influence of an increasing particle coordination on the densification of spherical powders
TL;DR: In this article, the shape of the average cell is determined by the radial distribution function of a "random dense" packing of spheres, and the effects of an increasing coordination on densification by these mechanisms are assessed.
Journal ArticleDOI
Effect of Initial α‐Phase Content on Microstructure and Mechanical Properties of Sintered Silicon Carbide
TL;DR: In this paper, the effects of initial α-phase content on the microstructure and the mechanical properties of the liquid phase-sintered and subsequently annealed materials were investigated.
Journal ArticleDOI
Hot-pressing behaviour of silicon carbide powders with additions of aluminium oxide
TL;DR: The hot-pressing behavior of different silicon carbide powders (average particle sizes ranging from ∼ 0.5 to 9 μm) with aluminium oxide additions ranging from 0.01 to 0.15 volume fractions was investigated in this paper.
Journal ArticleDOI
A network model for initial stage sintering
F. Parhami,Robert M. McMeeking +1 more
TL;DR: In this article, the authors investigated the densification of powders by initial stage sintering through computer simulations, where every particle center is represented by a node and every contact between neighboring particles by a discrete element.
Journal ArticleDOI
Effect of Weight Loss on Liquid‐Phase‐Sintered Silicon Carbide
TL;DR: In this paper, the evaporation of silicon carbide (SiC) ceramics during sintering has been studied by thermogravimetry in a graphite furnace filled with argon.