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.

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.

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.

Influence of Binder on Porous Ceramic Properties Prepared by Polymeric Sponge Method

2010 ◽  
Vol 63 ◽  
pp. 164-169 ◽  
Author(s):  
Katarzyna Jach ◽  
Katarzyna Pietrzak ◽  
Dariusz Kalinski ◽  
Marcin Chmielewski
Keyword(s):  
Ceramic Material ◽  
Aqueous Suspension ◽  
Porous Ceramic ◽  
Ceramic Materials ◽  
Strength Tests ◽  
Polyurethane Sponge ◽  
Sintering Conditions ◽  
The Relationship ◽  
Porous Ceramic Materials ◽  
Acid Esters

Porous ceramic materials are used in medicine as well as in industry. They can be prepared in the form of filter components, thermal insulators, or composite components. Preforms of this type can only be applied if they meet the respective structural requirements. In the present study, such a porous ceramic material was produced by the polymeric sponge method using a polyurethane sponge and a-Al2O3 Almatis. The aqueous suspension was prepared with binders of the two types: polyvinyl alcohol and a dispersion based on methacrylic acid esters and styrene. The aim of this study was to find the relationship between the composition of the weight slips, sintering conditions, and the structure of the porous ceramic obtained. The paper presents the results of studies on the rheological properties of the ceramic slurries and the results of strength tests of the ceramic material.

scholarly journals Regularities of phase formation, structure and properties of chemically and thermally resistant ceramic materials

2018 ◽  
Vol 118 ◽  
pp. 119-131
Author(s):  
M. I. Ryschenko ◽  
O. Yu. Fedorenko ◽  
M. Yu. Lisytkina ◽  
O. V. Shevtsov ◽  
K. V. Bіlohubkina ◽  
...  
Keyword(s):  
Phase Composition ◽  
Phase Formation ◽  
Firing Temperature ◽  
Porous Ceramic ◽  
Ceramic Materials ◽  
Porous Ceramics ◽  
Structure And Properties ◽  
Sintered Ceramic ◽  
Water Permeability Coefficient ◽  
Resistant Ceramic

Based on the compositions of MgO—Al2O3—TiO2—SiO2 system, the chemically and thermally resistant ceramic was obtained at a firing temperature of 1250 °C by the directed synthesis of tialite and mullite phases. The influence of alternative raw materials of natural and technogenic origin on the operational properties and phase composition of porous and densely-sintered ceramic materials was studied. The using expediency of pyrophyllite containing waste of quartzite mining and ferrotitanium production wastes as the phase forming components of ceramic masses is established. The mechanism of structure- and phase formation of tialite and mullite-tialite ceramics was investigated. It was established that, stabilization of the tialite phase at a temperature of 1200—1250 oC occurs while maintaining the ratio of TiO2/Al2O3 oxides ~ 1.4 and the presence of 1.3 wt. % Fe2O3, as the mineralizing component included in the waste. The possibility of obtaining tialite containing ceramic materials at a lower firing temperature (1200 oC) due to the formation of a tialite solid solution (Mg0.3Al1.4Ti1.5O5) while maintaining the ratio of MgO : TiO2 oxides = 0.18 was proved. Technological principles of the production of chemically and thermally resistant ceramics both with the densely-sintered and with the porous structure, the total porosity of which is respectively 0.41 and 60 %, have been developed. The permeability of porous ceramic materials of mullitе-tialite composition was determined (water permeability coefficient P = 5.39∙10-5 cm2/s), as well as parameters of sorption processes (diffusion rate of Cr2O7-2 and MnO4- ions is 6.38∙10-6 and 1.06∙10-5 cm2/s respectively). This indicates the possibility of using the developed porous ceramics for the manufacture of industrial wastewater filters. Complex studies of the phase composition, structure and properties of the developed ceramic materials confirmed the promise of their use for the manufacture of parts of equipment operating in corrosive environments.

scholarly journals Centrifugal Infiltration of Porous Ceramic Preforms by the Liquid Al Alloy – Theoretical Background and Experimental Verification

2016 ◽  
Vol 61 (1) ◽  
pp. 411-418 ◽  
Author(s):  
A.J. Dolata
Keyword(s):  
Heat Exchange ◽  
Liquid Metal ◽  
Experimental Verification ◽  
Porous Ceramic ◽  
Specific Area ◽  
Ceramic Materials ◽  
Theoretical Background ◽  
Al Alloy ◽  
Ceramic Preform ◽  
Porous Ceramic Materials

The goal of this work is the description of phenomena occurring during centrifugal infiltration of porous ceramic materials by liquid Al alloy. In this method, the pressure required to infiltration of liquid metal into pores of ceramic is generated by centrifugal force. From the beginning it was assumed that the porous ceramic material will create reinforcement layer in specific area of the casting. The forces that influence on the liquid metal during mould centrifugation and heat exchange between ceramic preform and metal alloy within the area of the front of infiltration were considered in the analysis. The paper presents also selected experiment results.

scholarly journals Smart ceramic materials for homogeneous combustion in internal combustion engines: A review

2009 ◽  
Vol 13 (3) ◽  
pp. 153-163 ◽  
Author(s):  
Kannan Chidambaram ◽  
Tamilporai Packirisamy
Keyword(s):  
Combustion Chamber ◽  
Internal Combustion Engines ◽  
Porous Ceramic ◽  
Ceramic Materials ◽  
Combustion Engines ◽  
Emission Level ◽  
Engine Cylinder ◽  
Homogeneous Combustion ◽  
Zero Emission ◽  
Porous Ceramic Materials

The advantages of using ceramics in advanced heat engines include increased fuel efficiency due to higher engine operating temperatures, more compact designs with lower capacity cooling system. Future internal combustion engines will be characterized by near zero emission level along with low specific fuel consumption. Homogenous combustion which realized inside the engine cylinder has the potential of providing near zero emission level with better fuel economy. However, the accomplishment of homogeneous combustion depends on the air flow structure inside the combustion chamber, fuel injection conditions and turbulence as well as ignition conditions. Various methods and procedures are being adopted to establish the homogeneous combustion inside the engine cylinder. In recent days, porous ceramic materials are being introduced inside the combustion chamber to achieve the homogeneous combustion. This paper investigates the desirable structures, types, and properties of such porous ceramic materials and their positive influence on the combustion process.

Preparation of Porous Ceramic Materials for Backscatter Electron Imaging: Some observations on MgO Refractory Brick

2004 ◽  
Vol 10 (S02) ◽  
pp. 742-743
Author(s):  
James H Steele
Keyword(s):  
Porous Ceramic ◽  
Ceramic Materials ◽  
Backscatter Electron ◽  
Refractory Brick ◽  
Backscatter Electron Imaging ◽  
Electron Imaging ◽  
Porous Ceramic Materials

Extended abstract of a paper presented at Microscopy and Microanalysis 2004 in Savannah, Georgia, USA, August 1–5, 2004.

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