30 Result(s)
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Article
A. G. Tkachev
Characterization and Evaluation of Materials
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Article
Removal of Lead Ions from Aqueous Media by a Cryogel Based on Graphene Oxide Modified with Lignosulfonate: A Kinetic Study
This paper studies the kinetics of adsorption of lead ions from aqueous solutions under static conditions on a new nanocomposite material—graphene oxide/lignosulfonate (GO/LS). The adsorption capacity of the n...
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Magnetically active nanocomposite aerogels: preparation, characterization and application for water treatment
Magnetically active nanocomposite aerogels were prepared, characterized and used for water treatment. These materials were characterized by SEM, TEM, XRD, FT-IR and BET methods. These materials have ferromagne...
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Article
Polymer Composites Based on Shungite and Taunite-M Carbon Nanomaterial for Radioprotective Coatings
The present brief review presents the results of studies of the electrical conductivity and microwave properties of polymer composites based on Taunite-M and shungite for production of radiation-protective coa...
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A Technology for Producing Polymeric Composites Based on Carbon Nanofibers
Technologies for producing liquid-phase polymer composites of carbon nanofibers and their modifications are presented: carboxylated carbon nanotubes, polyaniline-modified nanotubes, supercondensate of multiwal...
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Methane Adsorption in Microporous Carbon Adsorbent with a Bimodal Pore Size Distribution
Methane adsorption in MPU-007 microporous carbon adsorbent with a wide pore size distribution was studied at a pressure as high as 40 MPa and the temperatures of 303, 313, 323, and 333 K. The maximum value of ...
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Characterisation and electrical conductivity of polytetrafluoroethylene/graphite nanoplatelets composite films
Graphite nanoplatelets (GNPs), with a thickness of 3–10 graphene layers and lateral linear dimensions varying from 2 to 10 μm, were used to enhance the conductivity of polytetrafluoroethylene (PTFE) films. Ten...
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Kinetics of liquid-phase adsorption of organic dye on activated carbons
The kinetic parameters of liquid-phase adsorption of a model organic dye, such as methyl orange, from aqueous solution on carbon sorbents were determined under static conditions. Activated carbon and carbon mo...
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The effect of graphene oxide (GO) on biomineralization and solubility of calcium hydroxyapatite (HA)
Interaction between GO and the counterpart of the bone tissue, calcium hydroxyapatite Ca10(PO4)6(OH)2 (HA), is modeled in the course of synthesis of nanosize composite materials (CMs) based on graphene oxide (GO)...
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Article
Modification of an activated carbon pore surface by nanocarbon and study of its adsorption characteristics
This paper is devoted to development of a method for modification of sorption materials based on activated carbons. The possibility of application as modifiers of carbon nanotubes is shown. Increase of absorpt...
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Article
High-temperature ceramic filter for furnace gas analyzer
The manufacturing of the ceramic filters used in a gas analyzer for sampling flue gases at temperatures to 950°C is described. The proposed technology makes it possible to obtain a through porous structure wit...
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Sol-gel synthesis and investigation of metal-oxide catalysts for the preparation of carbon nanomaterials
In this work, the investigation of metal-oxide catalysts of various chemical compositions used in the synthesis of carbon nanotubes was performed. The physical-mechanical (dispersity) and structural (specific ...
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Article
Durable porous ceramic material in apparatus for monitoring anticorrosion protection of main pipelines
Mix compositions are synthesized and their sintering conditions for the production of ceramic lugs are determined. The ceramic structure obtained makes it possible to increase 8–10-fold the service life of thi...
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Article
Production of Low-Melting Glazes Without Frit Melting
The possibility of using low-melting glazes for decorative ceramics without frit melting is studied. It is demonstrated that a transparent glaze layer can be obtained at a firing temperature not higher than 10...
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Article
Ceramic Flame Damper
The results of studying ceramic mixtures for high-temperature porous ceramics are considered. The technology of producing a flame damper based on such mixture is analyzed.
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Specifics of synthesis of soluble glass using sodium sulfate
Soluble glass is synthesized using sodium sulfate. Decorative glass ceramic materials are made on its basis. This paper considers the results of x-ray phase analysis and thermodynamic calculations of the redox...
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Article
Optimization of brick mixture formula based on drying properties
Using mathematical modeling, the possibility of improving the drying properties of brick mixtures without using stony grog components is demonstrated. The proposed method can be recommended for the optimizatio...
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Article
Controlling the quality of ceramics
Possible approaches to solving the problem of the reproducibility of ceramic products are considered. The insufficient effect of using only statistical methods for this purpose is discussed. A program for inve...
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Porosity of heat-resistant glass ceramic coatings based on a nonfritted glass matrix
The porous macrostructure of heat-resistant coatings is described as a function of the content of Al2,O3, Cr2O3, NiO, ZrO2, and Fe2O3 additives. The relationship between the porosity of the coating and its refrac...
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Glass ceramic coatings based on a fritless glass binder
The conditions and significant factors for preparing heat-resistant glass ceramic coatings for alloyed steels without using frit are considered. It was established that in order to obtain a glassy coating the ...
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Graphic-analytical model for predicting the uniformity of glass enamel coatings
A graphic-analytical model that makes it possible to estimate the capacity of a metal-melt system of a formed coating for producing inhomogeneities in the form of nonsealed shrinkage cracks and to calculate th...
