Nanostructured Perovskites for the Fabrication of Thin Ceramic Membranes and Related Phenomena

Zyryanov, V. V.; Nemudry, A. P.; Sadykov, Vladіslav

doi:10.1002/9780470977569.ch6

Cited by 6 publications

(2 citation statements)

References 45 publications

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“…The formation of domains in mixed ionic-electron conductors may lead to an enhanced diffusivity of oxygen ions especially at lowered temperatures, including ambient temperature (13). The phenomenological model of high oxygen diffusivity along nanodomain walls was developed and tested for perovskites, the most promising materials for oxygen permselective membranes (14). The formation of nanodomains may be regarded just as a one possible mechanism for relaxation of mechanical strains in the boundary between cubic matrix of solid solution and "embedded" low-doped zirconia nanograins.…”

Section: Resultsmentioning

confidence: 99%

Nano- and Microstructure Design by Mechanochemical Approach of Ceramic Ionic Composites on the Base of SSZ

Zyryanov¹,

Уваров²,

Ulihin³

2011

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Two series of Sc-stabilized zirconia nanostructured ceramic composites were prepared from mechanochemical origin nanopowders. The first series was obtained by reaction sintering, and the second one by conventional sintering of ceramic powders prepared mechanical activation route. Ceramic samples were studied by complex impedance method and characterized by XRD, SEM with EDX microanalysis. Dense nanostructured ceramics with high conductivity at operation temperature for IT SOFC 900-1000 K were obtained by sintering at 1673 K. The ceramic composites contain mainly cubic phase with minor tetragonal and monoclinic phases. The ordered cracking of grains near the surface with a size of blocks ~20 nm was observed. Cracking near surface and nanostructuring both results from relaxation of mechanical strains related to misfit in volume transformations under cooling of cubic matrix and embedded tetra/monoclinic nanograins. Nano- and microstructure design of composites by mechanochemical ceramic method may become a promising approach in solid state ionics.

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Section: Resultsmentioning

confidence: 99%

Nano- and Microstructure Design by Mechanochemical Approach of Ceramic Ionic Composites on the Base of SSZ

Zyryanov¹,

Уваров²,

Ulihin³

2011

ECS Trans.

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“…Íåäîñòàòêàìè òàêîé ñõåìû, ïîìèìî îãðàíè÷åííîñòè ðåñóðñîâ, ÿâëÿþòñÿ òâåðäûå îòõîäû (øëàê) è áûñòðàÿ äåãðàäàöèÿ ìåìáðàí ïðè èñïîëüçîâàíèè íå-î÷èùåííîãî ñèíòåçèðîâàííîãî ãàçà. Òóáóëÿðíûå ÊÌÐ ðåàëüíî èçãîòîâèòü íà íåñóùåé ïîðèñòîé ïîäëîaeêå ñ òîíêèì ñåëåêòèâíûì ñëî-åì [4], íî ïðè ìàñøòàáèðîâàíèè âîçíèêàþò ïðîáëåìû, ñâÿçàííûå ñî ñáîðêîé ìåìáðàííûõ ìîäóëåé.…”

Section: àííîòàöèÿunclassified

Cermet Oxygen Membranes with Controllable Nanoarchitecture for Novel Coal Power Engineering

2016

KhUR

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Êëèìàòè÷åñêèå èçìåíåíèÿ ñâÿçûâàþò ñ àíòðîïîãåííîé ýìèññèåé òåïëè÷íîãî ãàçà CO 2 , ãëàâíûì èñòî÷íèêîì êîòîðîé ñ÷èòàåòñÿ óãîëüíàÿ ýíåðãåòèêà. Îäíàêî ðåêîíñòðóêöèÿ êëèìàòà ïî êåðíàì ëüäà â Àíòàðêòèäå ïîêàçûâàåò, ÷òî àíàëîãè÷íûé ïåðèîä ïîòåïëåíèÿ óaeå áûë â èñòîðèè ïëàíåòû, à ñîäåðaeàíèå CO 2 ðàñòåò ñèìáàòíî ïîâûøåíèþ CH 4 è ñëåäóåò çà ïîòåïëåíèåì, âûçâàííûì öèêëè÷åñêèìè èçìåíåíèÿìè âðàùåíèÿ Çåìëè âîêðóã Ñîëíöà [1]. Áåñïðåöåäåíòíûé ðîñò êîíöåíòðàöèè CO 2 â àòìîñôåðå çà ïîñëåäíèå äåñÿòèëåòèÿ ïîâûøàåò âåðîÿòíîñòü êàòàñòðîôè÷åñêèõ ïîãîäíûõ ÿâëåíèé, íî íå ìîaeåò áûòü ïðè÷èíîé ïîòåïëåíèÿ.Äîëÿ óãëÿ â ýíåðãîáàëàíñå ñîñòàâëÿåò 42 % è óñòîé÷èâî ðàñòåò, ïðè ýòîì óãîëüíàÿ ýíåðãåòèêà ñëóaeèò ãëàâíûì èñòî÷íèêîì òâåðäûõ îòõîäîâ, àýðîçîëåé, îêñèäîâ NO x è SO x , çàãðÿçíåíèÿ îêðóaeàþùåé ñðåäû Hg, U è ò. ä. ÓÄÊ 54.

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Oxidative Coupling of Methane: Opportunities for Microkinetic Model‐Assisted Process Implementations

2016

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Oxidative coupling of methane is a low‐cost alternative for ethylene production. However, its high exothermicity, complex reaction network, and low selectivity to C2 products require more in‐depth analysis for economically viable process implementation. Microkinetic modeling enables assessment of operating conditions and catalyst properties on the overall performance via elementary gas‐phase and catalytic reactions. The know‐how to reproduce and interpret experimental kinetic data, especially the role of highly reactive intermediate species, is crucial for correct reaction network determination. Once the catalyst descriptors, physical catalyst properties, and operating conditions are determined and optimized, next catalyst generations can be developed tailored to the process implementation.

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Nanostructured Perovskites for the Fabrication of Thin Ceramic Membranes and Related Phenomena

Cited by 6 publications

References 45 publications

Nano- and Microstructure Design by Mechanochemical Approach of Ceramic Ionic Composites on the Base of SSZ

Nano- and Microstructure Design by Mechanochemical Approach of Ceramic Ionic Composites on the Base of SSZ

Cermet Oxygen Membranes with Controllable Nanoarchitecture for Novel Coal Power Engineering

Oxidative Coupling of Methane: Opportunities for Microkinetic Model‐Assisted Process Implementations

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