Effect of Firing Regime on the Structure and Properties of Highly Porous Ceramic Materials Based on Alumina-Magnesia Spinel

2019 ◽  
Vol 60 (1) ◽  
pp. 55-60
Author(s):  
N. V. Buchilin ◽  
G. Yu. Lyulyukina ◽  
N. M. Varrik
Keyword(s):  
Porous Ceramic ◽  
Ceramic Materials ◽  
Structure And Properties ◽  
Firing Regime ◽  
Magnesia Spinel ◽  
Highly Porous ◽  
Porous Ceramic Materials

scholarly journals Effect of firing mode on the structure and properties of highly porous ceramic materials based on alyumomagnezia spinel

2019 ◽  
pp. 37-42
Author(s):  
N. V. Buchilin ◽  
G. Yu. Lyulyukina ◽  
N. M. Varrik
Keyword(s):  
Heat Treatment ◽  
Mechanical Characteristics ◽  
Porous Ceramic ◽  
Ceramic Materials ◽  
Porous Ceramics ◽  
Preliminary Heat Treatment ◽  
Structure And Properties ◽  
Firing Mode ◽  
Highly Porous ◽  
Porous Ceramic Materials

The results of studies of sintering of spinel porous ceramics using aluminum and magnesium oxides as initial components without sintering additives are presented. It is shown that the optimal burning temperature range for the production of materials with an open-cellular porous structure is 1700‒1730 °C. It has been established that the preliminary heat treatment of oxides significantly affects the mechanical characteristics of materials. Materials were obtained with an interconnected porosity of up to 85 % and a compressive strength of up to 1,0 MPa. Ill. 6. Ref. 25.

CERAMICS BASED ON ORGANOSILICON POLYMERS-PRECURSORS: MICROSTRUCTURE AND PROPERTIES (review). Part 1

2021 ◽  
pp. 21-33
Author(s):  
A.M. Shestakov ◽  
Keyword(s):  
Ceramic Composite ◽  
Porous Ceramic ◽  
Ceramic Materials ◽  
Structure And Properties ◽  
Ceramic Foams ◽  
Controlled Porosity ◽  
Composition Structure ◽  
Silicon Based ◽  
Porous Ceramic Materials ◽  
Organosilicon Polymers

The paper considers the process of pyrolysis of polymers-precursors, and also shows the influence of various parameters of technological processes for obtaining ceramics on its composition, structure, and properties. The main types of binary, ternary and multicomponent silicon-based ceramics, methods of its preparation, features of structure and properties are considered, and promising directions of application of ceramics are determined. The possibility of obtaining porous ceramic materials (ceramic foams) with controlled porosity and ceramic composite materials with a given composition is noted.

New heterogeneous catalytic systems based on highly porous ceramic materials modified with immobilized d-metal cage complexes for H2 production from CH4

2019 ◽  
Vol 29 (6) ◽  
pp. 669-671 ◽  
Author(s):  
Alexey G. Dedov ◽  
Yan Z. Voloshin ◽  
Alexander S. Belov ◽  
Alexey S. Loktev ◽  
Alexander S. Bespalov ◽  
...  
Keyword(s):  
Porous Ceramic ◽  
Ceramic Materials ◽  
H2 Production ◽  
Catalytic Systems ◽  
Heterogeneous Catalytic ◽  
Highly Porous ◽  
Porous Ceramic Materials

Magnetic Resonance Imaging of Water Absorption by Highly Porous Ceramic Materials

2019 ◽  
Vol 484 (2) ◽  
pp. 44-47
Author(s):  
E. V. Morozov ◽  
V. M. Buznik ◽  
A. S. Bespalov ◽  
D. V. Grashchenkov
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Water Absorption ◽  
Porous Ceramic ◽  
Ceramic Materials ◽  
Resonance Imaging ◽  
Highly Porous ◽  
Porous Ceramic Materials

scholarly journals Investigation of the structure and properties of ceramic materials with a rigid system of microfiltration transport pores based on basalt fibers

2021 ◽  
Author(s):  
Siarhei Besarab ◽  
Sergey Azarov ◽  
Justyna Sauka ◽  
Evgeny Petyushik ◽  
Tatyana Azarova ◽  
...  
Keyword(s):  
Phase Composition ◽  
Porous Ceramic ◽  
Basalt Fiber ◽  
Ceramic Materials ◽  
Structure And Properties ◽  
Basalt Fibers ◽  
Rigid System ◽  
Composition Structure ◽  
The Relationship ◽  
Porous Ceramic Materials

The report provides information on the formation of the structure of porous ceramic materials made of basalt fiber obtained by pressing with subsequent sintering. The phase composition, structure, and properties of ceramics are studied. The relationship between the structure, phase composition, and properties of the ceramic material is established.

scholarly journals Obtaining of dense and highly porous ceramic materials from metallurgical slag

2003 ◽  
Vol 35 (2) ◽  
pp. 85-91 ◽  
Author(s):  
E. Fidancevska ◽  
B. Mangutova ◽  
D. Milosevski ◽  
M. Milosevski ◽  
J. Bossert
Keyword(s):  
Flexural Strength ◽  
Porous Material ◽  
Mass Loss ◽  
Porous Ceramic ◽  
Glass Ceramics ◽  
Ceramic Materials ◽  
Metallurgical Slag ◽  
Porous System ◽  
Highly Porous ◽  
Porous Ceramic Materials

Glass-ceramics in a dense and highly porous form can be obtained from metallurgical slag and waste glass of TV monitors. Using polyurethane foam as pore creator, a highly porous system with porosity of 65 ? 5 %, E-modulus and flexural strength of 8 ? 3 GPa and 13 ? 3.5 MPa respectively can be obtained. This porous material had durability (mass loss) of 0.03 % in 0.1 M HCl that is identical with the durability of a dense composite.

scholarly journals Magnetic resonance imaging of water absorption by highly porous ceramic materials

2019 ◽  
Vol 484 (5) ◽  
pp. 563-567
Author(s):  
E. V. Morozov ◽  
V. M. Bouznik ◽  
A. S. Bespalov ◽  
D. V. Graschenkov
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
Water Absorption ◽  
Porous Ceramic ◽  
Ceramic Materials ◽  
Imaging Method ◽  
Resonance Imaging ◽  
Oxide Fibres ◽  
Highly Porous ◽  
Porous Ceramic Materials

By using the magnetic resonance imaging method the nontrivial character of water absorption was demonstrated for the first time in highly porous ceramic materials. The effect of hygroscopic memory was found out which is that the preferable concentration of absorbed water in certain areas within the sample persists regardless the subsequent sample wetting history. Coating the oxide fibres with fluorine-containing hydrocarbons in supercritical CO2 in order to hydrophobize the material has been shown to affect substantially the water transport within the sample that can be referred to as an effective approach to protect the porous materials from humid environment. The results obtained demonstrate the advantages of the magnetic resonance imaging in studying the water absorption processes and visualization of water pathways in highly porous ceramic materials.

Sintering Behavior of Highly Porous Ceramic Materials Based on the Al2O3–MgO System

2020 ◽  
Vol 56 (4) ◽  
pp. 417-424
Author(s):  
N. V. Buchilin ◽  
O. V. Basargin ◽  
N. M. Varrik ◽  
A. A. Lugovoi
Keyword(s):  
Porous Ceramic ◽  
Ceramic Materials ◽  
Sintering Behavior ◽  
Highly Porous ◽  
Porous Ceramic Materials

Perspective Biomass Carrier for Anaerobic Processing Systems of Organic Waste AIC

2020 ◽  
Vol 67 (1) ◽  
pp. 148-155
Author(s):  
Anatoliy V. Fedotov ◽  
Viktor S. Grigoriev ◽  
Dmitriy A. Kovalev ◽  
Andrey A. Kovalev
Keyword(s):  
Wastewater Treatment ◽  
Anaerobic Digestion ◽  
Specific Surface ◽  
Organic Waste ◽  
Porous Ceramic ◽  
Experimental Studies ◽  
Ceramic Materials ◽  
Porous Ceramics ◽  
Developed Surface ◽  
Highly Porous

To speed up the wastewater treatment under aerobic conditions and to optimize the processes of anaerobic wastewater treatment in digesters, immobilization technologies of microorganisms and enzymes on solid carriers are used. Ceramic carriers based on aluminosilicates and alumina are one of the promising inorganic biomass carriers. (Research purpose) To study the structure of porous ceramic biomass carriers for anaerobic processing of organic waste and evaluate the prospects for their use. (Materials and methods) The substrate for anaerobic digestion was a mixture of sediments of the primary and secondary sewage sumps of the Lyubertsy treatment facilities. K-65 cattle feed was used to ensure the constancy of the composition of organic substances in substrates as a cosubstrate. The authors used the method of low-temperature nitrogen adsorption of Bruner-Emmett-Teller to study the pore structure and specific surface of solid carriers on a specific surface analyzer Quntachrome Autosorb-1. (Results and discussion) The main characteristics (specific surface, volume of micro- and mesopores, predominant pore radius, water absorption and others) of chamotte foam lightweight and highly porous corundum ceramics were determined. It was revealed that ceramic materials with a developed surface and electrically conductive material provided an increase in biogas yield by 3.8-3.9 percent with an increase in methane content by an average of 5 percent. (Conclusions) The results of anaerobic digestion showed a positive effect of both a conductive carrier and highly porous ceramic materials on the process of anaerobic bioconversion of organic waste into biogas. It is advisable to expand experimental studies on the use of a conductive carrier with a developed surface based on highly porous ceramics.

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