Electric‐field generation by gas–solid combustion

Martirosyan, Karen S.; Filimonov, I. A.; Luss, Dan

doi:10.1002/aic.10022

Cited by 19 publications

(23 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The three types of generated electric signals found in [17][18][19]23] were explained in [24] by different distances from one or both measurement electrodes to the sample end faces and by possible pressure unloading through them. Not downgrading the importance of assumptions made in [23,24], we should note that the idea of the maximum concentration and maximum fluxes of charge carriers in the vicinity of the temperature maximum, which was used in the estimates in [24], is confirmed neither experimentally [20,21,25,26] nor theoretically [27].…”

Section: Generation Of Electric Fieldsmentioning

confidence: 98%

“…In contrast to the previous works [9-15, 17-19, 22], Martirosyan et al [20,21,25,26] managed to develop and apply experimental techniques that allow in situ measurements of the generated electric signal and temperature (of the local region of the mixture or particle) at which the signal arises. Thus, the dynamics of charge transfer was related to the reaction kinetics in an individual reacting particle, and the distribution of the electric potential (electric structure) was related to the distributions of temperature and conversion depth (thermal-diffusion structure) in the combustion wave.…”

Section: Generation Of Electric Fieldsmentioning

confidence: 99%

“…A new technique of simultaneous measurements of the local electric field and local temperature in a plane combustion wave, which was developed in [21,26], not only eliminated this drawback but also allowed simpler experiments with powders and compact samples rather than complicated experiments with individual particles. It allowed [21,26] determining the induction period of the electric signal, temperatures at which the intrinsic electric field appears and disappears, and the relation between the field, temperature distribution, and heatrelease rate in the high-temperature synthesis wave.…”

Section: Generation Of Electric Fieldsmentioning

confidence: 99%

“…It allowed [21,26] determining the induction period of the electric signal, temperatures at which the intrinsic electric field appears and disappears, and the relation between the field, temperature distribution, and heatrelease rate in the high-temperature synthesis wave. It was found [26] that a local electric signal in a reacting powder appears not immediately but after reaching the maximum rate of temperature growth (reaction). The maximum voltage (U = 0.12-0.5 V) and current (I = 5-45 mA) at the point examined, however, are generated much earlier (at T = 650-900 • C) than the maximum combustion temperature is reached.…”

Section: Generation Of Electric Fieldsmentioning

confidence: 99%

See 3 more Smart Citations

High-Temperature Combustion Synthesis: Generation of Electromagnetic Radiation and the Effect of External Electromagnetic Fields (Review)

Filimonov

Kidin

2005

Combust Explos Shock Waves

Self Cite

View full text Add to dashboard Cite

A critical review of recent papers on mechanisms of generation of internal electromagnetic fields and the action of external electromagnetic fields on self-propagating high-temperature synthesis of heterogeneous systems is presented. Generation of an internal electromagnetic field is caused by different rates of diffusion of charged defects through the layer of the growing product in strongly nonequilibrium reactions. Possible emergence of residual magnetic fields is related to orientation of magnetic domains in the arising internal thermal and electromagnetic fields of the synthesis wave. The external electromagnetic action is characterized by thermal, magneto-and electrodynamic, and kinetic factors. The thermal factor is caused by the Joule effect, whereas the electro-and magnetodynamic influence is caused by electromigration, magnetic compression and changes in electrical conductivity of the condensed phase, and ion wind in the gas in pores. The kinetic factor is caused by generation of superequilibrium charge carriers in condensed particles (defects) and by emission of high-energy electrons into the gas surrounding the particles.

show abstract

Section: Generation Of Electric Fieldsmentioning

confidence: 98%

Section: Generation Of Electric Fieldsmentioning

confidence: 99%

Section: Generation Of Electric Fieldsmentioning

confidence: 99%

Section: Generation Of Electric Fieldsmentioning

confidence: 99%

See 2 more Smart Citations

High-Temperature Combustion Synthesis: Generation of Electromagnetic Radiation and the Effect of External Electromagnetic Fields (Review)

Filimonov

Kidin

2005

Combust Explos Shock Waves

Self Cite

View full text Add to dashboard Cite

show abstract

“…For example, the specific energy of electric discharge during oxidation of the Fe/Fe 2 O 3 loosed mixtures [10] , χ Fe/FeO has the following value in FEDESes: χ Fe/FeO ≅ 0.061 ÷ 0.084 J/kg=0.07÷0.1 FEDESes while the specific energy of electric discharge during oxidation of the Ti/TiO 2 loosed mixtures [10] , χ Ti/TiO , equals to χ Ti/TiO =0.181÷0.2405 FEDESes. Thus, the loosed titanium powders are the more effective generators of electric energy during oxidation than the iron powders.…”

Section: Bio-cellsmentioning

confidence: 99%

To SHS Aspects other than those of Distributed Electrochemical Systems: From Current-Voltage Generators, Bio-cells, Batteries and Accumulators to Emission and Radiation Effects during SHS, etc

Ia¹

2016

Res. Rev. J Mat. Sci

View full text Add to dashboard Cite

Recent Experimental and numerical studies on Combustion Synthesis of Sulfides (CSS) in combination with the current ElectronicTheory of a Solid Body (ETSB) lead us to the conclusion that the CSS chemical reactions are accompanied by electron transitions inside the sulfide valence zone, i.e., by transitions between the energy states of electrons localized in the valence zone. Such a conclusion only can explain the huge difference of energy of sulfur clusters affinity to an electron from the sulfur ionization potential which is available in literature. In addition to the interrelated aspects of CSS and ETSB, we have presented a small review of the existing literature on electrochemical sources of current and voltage (cells, accumulators). This review is devoted to distributed electrochemical systems and to a certain extent supplements some of the earlier reviews written (with the participation of the author) for the sources of electricity based on SHS solely. As the result, it has been made the conclusion about the advantage of the combustion based sources of electric current (Pyrotechnic Sources of Electric Current, PSEC) in comparison with the modern accumulators and bio-cells. The conditions of PSEC stable work were discussed. Incidentally, we have also considered a few works concerning materials synthesis and nanoparticles. Nanoparticles are extremely popular now. The authors of the articles concerning such exotic objects use often in their publications unreasonable approximations or/and unchecked facts. In our opinion, the readers have to realize, where and what conclusions of similar authors deviate from the reality or from the classical results received earlier. To prove a solvency and a coherence of new results and representations is the business of innovators themselves, not of others or us. We just reveal some of their frequent shortcomings here. The comparison of the SHS systems on the specific electric energies generated during the synthesis has been also carried out. The energies appear to depend strongly on the composition, green density and the sample electric resistance. We have shown that in the SHS Semiconductive Systems of a Loosed Density (SLD) the generated specific electric energy is comparably less than that of a fish slope. Therefore, we have suggested new non-system units based on the specific electric energy generated by a fish slope as a useful measure for the SLD generated electric energies. It has appeared that the greatest quantity of specific electric energy is emitted by the loosed mixture of titanium with its nitride. Nevertheless, we have calculated

show abstract