Generation of charge carriers during combustion synthesis of sulfides

Марков, А. А.; Filimonov, I. A.; Poletaev, A. V.; Вадченко, С. Г.; Martirosyan, Karen S.

doi:10.3103/s1061386213020052

Cited by 12 publications

(18 citation statements)

References 15 publications

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“…It's clear that rather simple and double systems only can be directly described by Wagner's models. Usually, in practice we deal with more difficult systems when the number of carriers can be even three and more [11,28,29] .…”

Section: Historymentioning

confidence: 99%

“…For more noticeable increase in I E it is necessary to investigate a huge set of chemically reacting compositions. In our opinion, simpler and convenient way in this direction is connected with the macroscopic mechanisms of exoemission intensification, such as convection during CS or the application of an external field (centrifugal [34] , gravitational [35,36] and/or electromagnetic, etc. [11,29,36] ).…”

Section: Emission Problemsmentioning

confidence: 99%

“…In our opinion, simpler and convenient way in this direction is connected with the macroscopic mechanisms of exoemission intensification, such as convection during CS or the application of an external field (centrifugal [34] , gravitational [35,36] and/or electromagnetic, etc. [11,29,36] ). It has been also detected a broadband radiation in a distant ultraviolet area of the optical spectrum [37] (upto 200 nanometers, nm) during the CS of heterogeneous systems with solid products.…”

Section: Emission Problemsmentioning

confidence: 99%

“…Nevertheless, Resent investigation of charge generation and transfer during the CS of sulfides [29,36] lead us to conclusion that vice versa may happen in reactive solids. The reason is that sometimes charge is formed by electron transitions inside the valent zone which has much narrower range of resolved energies.…”

Section: Charge Formation In Reactive Solidsmentioning

confidence: 99%

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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

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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

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Section: Historymentioning

confidence: 99%

Section: Emission Problemsmentioning

confidence: 99%

Section: Emission Problemsmentioning

confidence: 99%

Section: Charge Formation In Reactive Solidsmentioning

confidence: 99%

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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

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“…Он, как оказалось, тоже может быть успешно синтезирован в волне горе-ния. Применяемая на практике технология изготовления индикаторов из сульфида цин-ка [1,2] с достаточно широким оптическим спектром эмиссионного излучения несколь-ко отличается от исследованных нами ранее условий [3], так как подразумевает исполь-зование стадии пассивации целевого мате-риала, проводимой на открытом воздухе. Мы учли опыт [1] и провели синтез в воз-душной атмосфере, совместив стадии отжи-га и пассивации конечного продукта.…”

unclassified

To Conditions of Chain Spontaneous Ignition and to Comparative Characteristics of Combustion Synthesises With That for ZNS in Open Air at the Limited Range of Humidity

Barinov¹,

Умаров²,

Марков³

et al. 2017

IJAFR (МЖПФИ)

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В работе проведены экспериментальные исследования, доказывающие необходимость включения в со-ответствующую кинетическую схему реакции стадии окисления цинка парами воды, содержащимися в от-крытом воздухе, для исследования процесса синтеза сульфида цинка на воздухе. Установлено, что при го-рении смеси цинка с серой на воздухе продуктами горения являются сульфид и оксид цинка, при горении в аргоне - только сульфид цинка. Экспериментально определены границы полуострова цепного самовос-пламенения гремучей смеси, образующейся в таких условиях, на плоскости данных «влажность - темпе-ратура» (или ток поджигающей спирали). Представлены сравнительные характеристики синтеза сульфида цинка горением на открытом воздухе по отношению к другим, хорошо известным на сегодня методам син-теза материалов горением: CCSO (синтез сложных оксидов из смеси с углеродом) и CSS (синтез сульфидов в условиях горения). Sciences, Moscow, e-mail: a_a_markov@yahoo.com Experimental investigations proving the need of inclusion of the reaction stage of zinc oxidation by water vapor containing in open air into the corresponding kinetic reaction scheme have been carried out in and analyzed in the paper presented by comparison of it with the other currently known synthesises by combustion: CCSO (carbon combustion synthesis of oxides) and CSS (combustion synthesis of sulfides). It has been established that that in case of combustion of a mixture of zinc and sulfur in air combustion products are sulphide and zinc oxide, in the case of combustion in argon, only zinc sulphide. The boundaries of the peninsula of the chain autoignition of the explosive mixture formed under such conditions are determined experimentally on the data plane humidity-temperature (or current of the igniting spiral). Ключевые слова: горение, самораспространяющийся высокотемпературный синтез (СВС), сульфид цинка TO CONDITIONS OF CHAIN SPONTANEOUS IGNITION AND TO COMPARATIVE CHARACTERISTICS OF COMBUSTION SYNTHESISES WITH THAT FOR ZNS IN OPEN AIR AT THE LIMITED RANGE OF HUMIDITY Keywords: combustion, Self-propagating high-temperature synthesis (SHS), Zinc sulfideСульфид цинка обладает полезными сег-нетоэлектрическими свойствами, широко и повсеместно применяется в качестве лю-минофора. Он, как оказалось, тоже может быть успешно синтезирован в волне горе-ния. Применяемая на практике технология изготовления индикаторов из сульфида цин-ка [1,2] с достаточно широким оптическим спектром эмиссионного излучения несколь-ко отличается от исследованных нами ранее условий [3], так как подразумевает исполь-зование стадии пассивации целевого мате-риала, проводимой на открытом воздухе. Мы учли опыт [1] и провели синтез в воз-душной атмосфере, совместив стадии отжи-га и пассивации конечного продукта. Материалы и методы исследованияВ экспериментах использовали стехиометриче-скую реакционную смесь, приготовленную из порош-ков цинка марки ПЦ-3 (размер частиц менее 10 мкм) и серы (сорт 9990, размер частиц менее 5 мкм) мето-дом сухого смешения в шаровой мельнице объемом 6 л в течение 4 часов. Предвар...

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Charge generation during the synthesis of doped lanthanum manganites via combustion of organo-inorganic precursors

Ostroushko

Русских

Maksimchuk

2021

Ceramics International

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Generation of charge carriers during combustion synthesis of sulfides

Cited by 12 publications

References 15 publications

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

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

To Conditions of Chain Spontaneous Ignition and to Comparative Characteristics of Combustion Synthesises With That for ZNS in Open Air at the Limited Range of Humidity

Charge generation during the synthesis of doped lanthanum manganites via combustion of organo-inorganic precursors

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