Synthesis and characterization of submicron silicon carbide powders with silicon and phenolic resin

Shi, Limin; Zhao, Hongsheng; Yan, Yi; Li, Ziqiang; Tang, Chunhe

doi:10.1016/j.powtec.2006.08.003

Cited by 46 publications

(21 citation statements)

References 17 publications

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“…12) In this approach, the novolac resin (the carbon source for the RB-SiC) 13), 14) was used as the binder material, and HMT was used as the blowing/ curing agent for the novolac resin. The blowing gas from HMT produced uniformly dispersed spherical pores inside the composite, which were then stabilized through a curing reaction between the blowing gas and the novolac resin.…”

Section: Introductionmentioning

confidence: 99%

Fabrication and characterization of porous alumina with denser surface layer by direct foaming

Shimamura

Fukushima

Hotta

et al. 2017

J. Ceram. Soc. Japan

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Porous alumina with a denser surface layer is fabricated from an alumina/novolac composite body containing hexamethylenetetramine (HMT) that is used as a blowing agent and a curing agent for the novolac resin. A gas blown from HMT leads to the formation of pores up to submillimeter inside the alumina/novolac composite body. On the other hand, the denser surface layer without large pores is formed by the gas released from the surface during blowing. The blowing condition for the alumina/ novolac composite body is examined as a function of heat-treatment temperature in order to investigate the formation of the pore and the surface layer. Porous alumina with the denser surface layer is obtained through de-binding and sintering of the body. This paper also describes the microstructure and mechanical strength of the sintered porous alumina, and advantages of the denser surface layer.

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Section: Introductionmentioning

confidence: 99%

Fabrication and characterization of porous alumina with denser surface layer by direct foaming

Shimamura

Fukushima

Hotta

et al. 2017

J. Ceram. Soc. Japan

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“…Adsorption is a surface-based rate process that causes an increase in the adsorbate concentration at the adsorbent surface, owing to the surface forces arising from the adsorbent-adsorbate interaction. In the present, nitroimidazole-adsorbent interaction is mainly attributed to the cation exchange and surface complexation reactions (H-bonding and other polar interactions) between multifunctional antibiotic molecules [23].…”

Section: Introductionmentioning

confidence: 91%

“…To this end, we consider silicon carbide (SiC), which is a non-oxide ceramic with a high melting point, high hardness, high wear resistance, low thermal expansion coefficient, and good chemical resistance [23][24][25]. These properties make SiC useful for numerous applications, such as polishing paste, grinding, wear-resistant, and high-temperature structural materials, catalyst supports, filters for molten metal or hot gases, and reinforcement in the preparation of composites [23,[26][27][28][29]. These properties of SiC are equally important for its application as a granular medium for the adsorptive removal of antibiotics, based on fixed/fluidized bed processing of the contaminated water with multiple regeneration cycles of the adsorbent.…”

Section: Introductionmentioning

confidence: 99%

Microwave-Assisted Synthesis of SiC Nanoparticles for the Efficient Adsorptive Removal of Nitroimidazole Antibiotics from Aqueous Solution

et al. 2017

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Abstract:Environmental pollution caused by the improper disposal of pharmaceuticals is a matter of global concern, and warrants immediate attention. Of particular concern is the aquatic contamination caused by the increasing use of antibiotics, which could give rise to superbugs. While researchers have mainly focused on improving the adsorption capacity of mostly activated carbon-based adsorbents, we have developed a non-conventional adsorbent (SiC nanoparticles) in the present work for the adsorptive removal of four different nitroimidazole antibiotics, namely metronidazole (MNZ), dimetridazole (DMZ), ronidazole (RNZ), and tinidazole (TNZ). In addition to the unique properties which are inherent to SiC, the present adsorbent not only possesses a high adsorption capacity, but also shows one of the highest adsorption rates; both of which are prerequisites for an efficient and cost-effective adsorption-based separation technology. Silicon carbide (SiC) nanoparticles, synthesized by a microwave-assisted method, were thoroughly characterized using X-ray diffraction, scanning electron microscopy, transmission electron microscopy, and the Brunauer-Emmett-Teller method. The adsorption isotherm data were accurately described by the Langmuir isotherm model. On the other hand, the adsorption kinetics, closely represented by the pseudo-second order kinetic model, were faster than most previously reported adsorbents. The reaction rate constants were 0.0089, 0.0079, 0.0072, and 0.0055 g/(mg min), for MNZ, DMZ, RNZ, and TNZ, respectively.

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“…In industrial scale, SiC is produced by the Acheon process, that is carbothermal reduction of silica sand with green petroleum coke in temperature of around 2400°C (Hongjie at al 2001). The carbothermal reduction is relatively simple and time-cost effective technique; in this process, mixture of carbon and silica or silicon is heated in a reactor in an inert atmosphere (Shi et al 2006). In order to optimize the production of SiC particles, several authors have proposed methods which used fine starting materials and reaction mixtures prepared by sol-gel techniques (Russell-Floyd et al 1993;Qiang Jin and Yun Go 2003;Shi et al 2006).…”

Section: Introductionmentioning

confidence: 99%

Method for increasing β-SiC yield on solid state reaction of coal fly ash and activated carbon powder

et al. 2011

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A novel process for increasing β-SiC yield on solid state reaction of coal fly ash and micro powder activated carbon powder has been proposed. β-SiC powder was synthesized at temperature 1300°C for 2 h under vacuum condition with 1 l/min argon flow. Cycling synthesis process has been developed for increasing β-SiC yield on solid state reaction of coal fly ash and activated carbon powder. Synthesized products were analyzed by XRD with Cu-Kα radiation, FTIR spectrometer and SEM fitted with EDAX. The results show that the amount of relative β-SiC is increased with the number of cycling synthesis.

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Synthesis and characterization of submicron silicon carbide powders with silicon and phenolic resin

Cited by 46 publications

References 17 publications

Fabrication and characterization of porous alumina with denser surface layer by direct foaming

Fabrication and characterization of porous alumina with denser surface layer by direct foaming

Microwave-Assisted Synthesis of SiC Nanoparticles for the Efficient Adsorptive Removal of Nitroimidazole Antibiotics from Aqueous Solution

Method for increasing β-SiC yield on solid state reaction of coal fly ash and activated carbon powder

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