Structure and Transport Properties of Zirconia-Based Solid Solution Crystals Co-Doped with Scandium and Cerium Oxides

Агарков, Д. А.; Борик, М. А.; Бредихин, С. И.; Kulebyakin, A. V.; Курицына, И. Е.; Ломонова, Е. Е.; Milovich, F. O.; Мызина, В. А.; Осико, В. В.; Agarkova, E. A.; Tabachkova, N. Yu.

doi:10.1134/s1023193518060022

Cited by 13 publications

(5 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These samples are based on optically transparent single crystalline membranes made of stabilized zirconia. Despite higher10Sc1YSZ (89 mol% ZrO2 + 10 mol% Sc2O3 + 1 mol% Y2O3) ionic conductivity (33)(34)(35), we usually used 8YSZ (92 mol% ZrO2 + 8 mol% Y2O3) material, as it has much simpler Raman spectra (36)(37). Single crystalline membranes were cut from the crystals, manufactured in A.M. Prokhorov General Physics Institute RAS (Russia) via direct melt crystallization technique in cold crucible (38)(39).…”

Section: Model Sofc Samplesmentioning

confidence: 99%

Application of High-Temperature Raman Spectroscopy (RS) for Studies of Electrochemical Processes in Solid Oxide Fuel Cells (SOFCs) and Functional Properties of their Components

et al. 2021

View full text Add to dashboard Cite

Combined technique and setup have been created that combines capabilities of electrochemical methods, as well as high-temperature Raman spectroscopy (RS) at Osipyan Institute of Solid State Physics RAS. In order to study the processes in the electrochemically active zone, a special geometry of samples was developed on basis of optically transparent single crystal membranes of an anionic conductor with a toroidal shape counter-electrode. With the use of this combined technique and special geometry, studies of the kinetics of reduction of nickel in composite SOFC anodes were carried out. The influence of the composition of fuel on Raman spectra obtained from the internal interface in the current load mode was also investigated, and the correlations with the cell voltage were studied. RS is also used to study the structure of single-crystal samples of anionic conductors, including at SOFCs operating temperature. The new combined technique was used to study other components: sealing glasses for SOFCs and optical glasses.

show abstract

Section: Model Sofc Samplesmentioning

confidence: 99%

Application of High-Temperature Raman Spectroscopy (RS) for Studies of Electrochemical Processes in Solid Oxide Fuel Cells (SOFCs) and Functional Properties of their Components

et al. 2021

View full text Add to dashboard Cite

show abstract

“…Research team at Osipyan Institute of Solid State Physics RAS works on research and development tasks in a field of solid oxide fuel cells and power plants based on them. This works lie in different directions from search for new electrolyte (15) and electrode ( 16) materials via investigation of electrode processes (17)(18), as well as manufacture of membrane-electrode assemblies (19)(20), search for sealing glasses (21), construction of SOFC stacks and fuel processors (22) up to power plant design, manufacture and testing.…”

Section: Introductionmentioning

confidence: 99%

Internal Conversion in the Membrane-Supported SOFC

Самойлов¹,

Агарков²,

Fedotov³

et al. 2021

ECS Trans.

View full text Add to dashboard Cite

Studies of the internal methane conversion process were carried out on an experimental short stack of two 100x100 mm electrolyte-supported SOFCs. A whole series of experiments were carried out on H2+CH4+H2O mixtures with different sets of conditions – an increase in the ratio and consumption of methane, and then a decrease in temperature. The results of experiments at an operating temperature of 850°C showed that the kinetics of internal conversion was largely underestimated. The assembly of two SOFCs converts methane up to concentrations not exceeding the calculated equilibrium ones, up to the maximum available flow rate on the equipment used – 187 ml/min – even without current passing. This fuel flow rate can provide a current of up to 53 A, while the rated operating current of these SOFCs is about 20 A, up to 30 A on methane-rich fuel. The current further stimulates the conversion by generating additional steam.

show abstract

“…The efficiency of a friction unit depends on the tribological properties of the materials used in movable connections of machine parts. Therefore, progress in the development of modern machines is focused on the creation of new materials related to high-tech products, the production of which requires innovative approaches and is based on qualitatively new operations using advanced methods of melting and mixing various components of the composition (Agarkov, 2018). New technological operations, which include high-frequency melt in a cold container, wave technologies for melt mixing, laser technologies for processing materials, methods of ion-laser surface treatment and others, allow obtaining materials with a unique combination of strength and tribological properties.…”

Section: Introductionmentioning

confidence: 99%