Microwave-induced substitutional-combustion reaction of Fe3O4/Al ceramic matrix porous composite

Lee, C. C.; Yoshikawa, Noboru; Shoji, Tetsuya

doi:10.1007/s10853-011-5669-3

Cited by 17 publications

(5 citation statements)

References 25 publications

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“…1. Detail of the single mode applicator is reported elsewhere [11]. Temperature was measured by an optical pyrometer which has a lower detection limit of 350 o C. Temperature-programmed regeneration (oxidation of the soot deposited filter) was performed under pure air condition, O 2 /N 2 (21%/79%).…”

Section: Methodsmentioning

confidence: 99%

Porous Glass Composite as Diesel Particulate Filter and the Microwave Regeneration

Lee

Yoshikawa

Shoji

2014

AMR

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In this study, porous SiO2·RO/stainless steel composite body was prepared through the polyurethane sponge replica method. Porous samples obtained through sintering consist of well dispersed and distributed stainless steel particles within the glass matrix. Such microstructure is desired for the purpose as a soot particulate filters (DPF) utilizing microwave rapid and selective heating characteristic, especially during the cold start phase of an engine. Results of microwave heating ability and diesel soot regeneration tests shows that, the fabricated porous composite material is proven to be reliable for rapidly microwave assisted regeneration. Both the regeneration temperature and O2composition in the supplied gas played an important role in the regeneration process.

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Section: Methodsmentioning

confidence: 99%

Porous Glass Composite as Diesel Particulate Filter and the Microwave Regeneration

Lee

Yoshikawa

Shoji

2014

AMR

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“…in a flame with a theoretical adiabatic temperature of 4057 K, 2,3 which requires an ignition temperature of $1500 K. 4 Thermite reactions are used for various applications, including welding, self-propagating high-temperature syntheses (SHS), and combustion syntheses (CS). [4][5][6] The porous ceramic-metal materials obtained in relatively low-cost rapid processes are characterized by superior micro-structural and mechanical properties. 7 The thermite reaction is featured by an inherent zerooxygen balance (note the oxygen exchange in Eq.…”

Section: Yehuda Meir and Eli Jerby A)mentioning

confidence: 99%

Underwater microwave ignition of hydrophobic thermite powder enabled by the bubble-marble effect

Meir

Jerby

2015

Applied Physics Letters

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Highly energetic thermite reactions could be useful for a variety of combustion and material-processing applications, but their usability is yet limited by their hard ignition conditions. Furthermore, in virtue of their zero-oxygen balance, exothermic thermite reactions may also occur underwater. However, this feature is also hard to utilize because of the hydrophobic properties of the thermite powder, and its tendency to agglomerate on the water surface rather than to sink into the water. The recently discovered bubble-marble (BM) effect enables the insertion and confinement of a thermite-powder batch into water by a magnetic field. Here, we present a phenomenon of underwater ignition of a thermite-BM by localized microwaves. The thermite combustion underwater is observed in-situ, and its microwave absorption and optical spectral emission are detected. The vapour pressure generated by the thermite reaction is measured and compared to theory. The combustion products are examined ex-situ by X-ray photo-electron spectroscopy which verifies the thermite reaction. Potential applications of this underwater combustion effect are considered, e.g., for detonation, wet welding, thermal drilling, material processing, thrust generation, and composite-material production, also for other oxygen-free environments.

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“…Microwave-induced substitutional combustion reaction was utilized to fabricate porous metal/ceramic composite materials from Fe 3 O 4 /Al powder mixtures [13]. The porous composite body was obtained by controlling the combustion reaction progress in a 2.45 GHz single mode applicator by manipulating the microwave power input.…”

Section: Controlling a Substitutional Reaction Between Metal And Oxidementioning

confidence: 99%

Microwave Energy Application for Materials' Processing and Environmental Technology

Yoshikawa

2014

Advances in Science and Technology

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Microwave heating was discovered more than 60 years ago. And nowadays, it became popular for the use as domestic ovens. Microwave has also been utilized for the industrial processes, such as drying and roasting. On the other hand, there have been many applications of microwave, being investigated for materials' processing and environmental technologies. They are attempted to take advantage of some specific characteristics in microwave heating, which differs from that of the conventional one. Rapid heating, internal heating, selective heating are the features to be taken into consideration. Moreover, so-called "non-thermal effect" is the additional feature in which researchers are particularly interested. In this article, it is intended to describe fundamental aspects in microwave heating and introduce some selected topics of research projects performed in our research group. They include researches on fabrication of some functional materials and on handling industrial wastes etc. In this article, it is also intended to interpret the phenomena observed in these applications from the fundamental view points of electromagnetic wave interaction with materials.

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Microwave-induced substitutional-combustion reaction of Fe3O4/Al ceramic matrix porous composite

Cited by 17 publications

References 25 publications

Porous Glass Composite as Diesel Particulate Filter and the Microwave Regeneration

Porous Glass Composite as Diesel Particulate Filter and the Microwave Regeneration

Underwater microwave ignition of hydrophobic thermite powder enabled by the bubble-marble effect

Microwave Energy Application for Materials' Processing and Environmental Technology

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