ZAO NTTs Bakor

Shcherbinka, Russia

ZAO NTTs Bakor

Shcherbinka, Russia
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Tarasovskii V.P.,Moscow State University | Krasnyi B.L.,ZAO NTTs Bakor | Koshkin V.I.,Fgaou Vo Sevastopol State University | Borovin Y.M.,Fgaou Vo Sevastopol State University | And 3 more authors.
Refractories and Industrial Ceramics | Year: 2016

The structure of permeable ceramic made from narrow-fraction electrocorundum grade F 240 and corundum hollow microspheres is studied using computer analysis of images obtained in a scanning electron microscope. Such quantitative indices are determined as pore shape, pore shape distribution, pore twisting factor, etc. It is shown that pore shape has a decisive effect on specimen permeability. © 2016 Springer Science+Business Media New York


Krasnyi B.L.,ZAO NTTs Bakor | Tarasovskii V.P.,ZAO NTTs Bakor | Krasnyi A.B.,ZAO NTTs Bakor | Omarov A.Yu.,FGBU VPO MGIU
Refractories and Industrial Ceramics | Year: 2013

Nonconformity of calculated and experimental data for porous material impregnation rate, and the effect of porosity on heat resistance, etc., are noted. This nonconformity cannot be explained by errors of calculation or experimental data. In this work the pore structure of porous ceramic with a membrane coating is studied using quantitative analysis of images in a scanning electron microscope (SEM) with the aim of obtaining its quantitative indices, pore shape, pore shape distribution, pore sinuosity factor, etc. It is shown that on the basis of numerical values obtained for material pore structure intentional design of a material structure required for each specific object is possible. © 2013 Springer Science+Business Media New York.


Trifonov Y.G.,Pure Research | Kuznetsova D.E.,Pure Research | Dosovitskii G.A.,Pure Research | Omarov A.Y.,Moscow State Industrial University | And 2 more authors.
Refractories and Industrial Ceramics | Year: 2015

Results are provided for a study of the mechanical and luminescence properties of aluminum-yttrium garnet ceramic specimens alloyed with cerium (Y2.97Ce0.03Al5O12). Specimens are prepared from nanostructured powder with a primary particle size of the order of 50 nm prepared by coprecipitation, compaction, and sintering. © 2015 Springer Science+Business Media New York


Vassiliev S.Y.,Moscow State University | Laurinavichute V.K.,Moscow State University | Abakumov A.M.,University of Antwerp | Govorov V.A.,Moscow State University | And 7 more authors.
Journal of the Electrochemical Society | Year: 2010

The performance of SnO2 ceramic anodes doped with copper and antimony oxides was examined in cryolite alumina melts under anodic polarization at different cryolite ratios, temperatures, times, and current densities. The corroded part consists of a narrow strong corrosion zone at the anode surface with damage of the intergrain contacts and a large increase in porosity, a wider moderate corrosion zone with a smaller porosity increase, and a Cu depletion zone, where the ceramic retains its initial microstructure and a slight porosity increase occurs due to the removal of the Cu-rich inclusions. Mechanical destruction of the anode was never observed in the 10-100 h tests. A microstructural model of the ceramic was suggested, consisting of grains with an Sb-doped SnO2 grain core surrounded by an ∼200 to 500 nm grain shell where SnO2 was simultaneously doped with Sb and Mn+ (M= Cu2+, Fe3+, Al3+). The grains were separated by a few nanometers thick Cu-enriched grain boundaries. Different secondary charge carrier (holes) concentrations and electric conductivities in the grain core and grain shell result in a higher current density at the intergrain regions that leads to their profound degradation, especially in the low temperature acidic melt. © 2010 The Electrochemical Society.


Shlyapin A.D.,Moscow State Industrial University | Omarov A.Y.,Moscow State Industrial University | Tarasovskii V.P.,ZAO NTTs Bakor | Trifonov Y.G.,Moscow State Industrial University
Refractories and Industrial Ceramics | Year: 2013

Results are given for petrographic analysis of aluminum oxide powder, prepared by chemical dispersion of aluminum-magnesium alloys, containing 6 and 12 wt.% magnesium. Powders are washed by vacuum filtration and dried at 60 - 80 C. Heat treatment is performed at 1400 C with soaking for 1 h. Comparative analysis of the results obtained is also performed, and material phase composition and structure are described. © 2013 Springer Science+Business Media New York.


Badaev F.Z.,Moscow State Industrial University | Tarasovskii V.P.,Moscow State Industrial University | Novoselov R.A.,Moscow State Industrial University | Khairi A.K.,Moscow State Industrial University | Reznichenko A.V.,ZAO NTTs Bakor
Refractories and Industrial Ceramics | Year: 2015

A chemical method with reaction of aluminum alloy D16 and aqueous sodium hydroxide solution is used to prepare very fine aluminum hydroxide powder. It is established by x-ray phase analysis that the powder obtained consists of three aluminum oxide modifications: gibbsite, boehmite, and bayerite. It is shown by laser diffraction that within an aluminum oxide suspension there is extensive bimodal distribution of particle size distribution (0.4 – 190 μm). The powder obtained is a precursor for preparing aluminum oxide ceramic. © 2015 Springer Science+Business Media New York


Krasnyi B.L.,ZAO NTTs Bakor | Tarasovskii V.P.,Moscow State Industrial University | Krasnyi A.B.,ZAO NTTs Bakor | Galganova A.L.,ZAO NTTs Bakor | Reznichenko A.V.,Moscow State Industrial University
Refractories and Industrial Ceramics | Year: 2015

A study is made of the effect of dispersant additives on the properties of a mix and a fired material containing hollow corundum microspheres. It is shown tht the addition of CASTAMENT FS10 together with CASTAMENT FW 10 makes it possible to obtain a green product having an ultimate compressive strength of at least 2 MPa. The fired material is slightly less porous than the material without dispersant additives. Heat-insulating ceramics based on hollow corundum microspheres and having an open porosity of at least 50.7% and an ultimate compressive strength of at least 35 MPa are obtained after firing at 1600°C. The material shrinks no more than 0.2% during the firing operation, which has made it possible to make large products of complex shape and ship them to customers. © 2015 Springer Science+Business Media New York


Krasnyi B.L.,ZAO NTTs Bakor | Tarasovskii V.P.,ZAO NTTs Bakor | Krasnyi A.B.,ZAO NTTs Bakor | Uss A.M.,ZAO NTTs Bakor
Refractories and Industrial Ceramics | Year: 2011

Results are provided for a study of the creation of ceramic materials for aerator nozzles. The effect of porous ceramic pore size and air bubbles emerging from it are considered. Physicotechnical properties of porous permeable material specimens for aerator nozzles are provided. An experiment is performed for determining the effect of air flow rate, effective pore size and specimen thickness on the oxygen content in water. Production of the inserts developed is organized. © 2011 Springer Science+Business Media, Inc.


Vasin A.A.,Moscow | Tarasovskii V.P.,ZAO NTTs Bakor | Omarov A.Y.,Moscow | Rybal'chenko V.V.,Moscow
Refractories and Industrial Ceramics | Year: 2015

Powders are obtained containing metal particles during chemical dispersion of Al–Mg (20 wt.%)-alloy. A method of high-temperature self-propagating synthesis is used in order to prepare cermet. Reaction sintering in a filtering combustion regime for a powder workpiece is implemented by heating in air at 550 – 600°C followed by initiation of metal exothermic reaction combustion. © 2015 Springer Science+Business Media New York


Krasnyi B.L.,ZAO NTTs Bakor | Tarasovskii V.P.,ZAO NTTs Bakor | Krasnyi A.B.,ZAO NTTs Bakor
Refractories and Industrial Ceramics | Year: 2012

Results are provided for a study of the effect of processing binder chemical composition on physicotechnical and corrosion properties of porous permeable ceramic based on electrocorundum. It is shown that physicotechnical properties of porous permeable ceramic depend both on chemical composition, and on specimen firing temperature. Use of a processing binder of aluminosilicate composition makes it possible to prepare objects from porous permeable ceramic with high strength properties with low firing temperatures. © 2012 Springer Science+Business Media, Inc.

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