Heat accumulating blocks based on the pyrophyllite and thermally expanded graphite
Igor Korobiichuk , Oleksandr Tolkach , Oleksandr Melnik , Michał Nowicki , Roman Szewczyk
AbstractElectrically conductive composites are widely employed as electrical heating elements, heat accumulation blocks and others. By the mechanical mixing the thermally expanded graphite (TEG), pyrophyllite and kaolin (as binder) the electroconductive composite materials were obtained. These materials have heat accumulation properties and can be used in the autonomous heating system as a heat accumulation blocks. The prospects of using pyrophyllite as a matrix and the possibility of partial replacement of kaolin were shown. A comparative analysis of main functional properties of composite was made. Based on pyrophyllite and kaolin a manufacturing technology of heat accumulation blocks was obtained. Analysis of obtained microphotographs of the material shows that the structure of the material is highly porous and layered. Layered structure provides high sensitivity of resistive properties of the strain in the direction perpendicular to the layers. Microphotographs showed that TEG particles in the forming process create flat agglomerates that are evenly distributed on the volume of ceramic matrix. The influence of ratio of pyrophyllite and kaolin on the porosity and electrical resistivity of a new composite material was investigated. It was shown that replacing kaolin by pyrophyllite makes possible to increase significantly the electrical conductivity of composites.
|Publication size in sheets||0.5|
|Book||International Multidisciplinary Scientific GeoConference Surveying Geology and Mining Ecology Management (SGEM 2016). Conference Proceedings, International Multidisciplinary Scientific GeoConference & EXPO SGEM, vol. 2, 2016, International Multidisciplinary Scientific GeoConference SGEM, ISBN 978-619-7105-59-9, 1098 p., DOI:10.5593/sgem2016B22|
|Keywords in English||thermally expanded graphite (TEG), pyrophyllite, kaolin, heat accumulation blocks|
|Score|| = 15.0, 18-11-2020, BookChapterSeriesAndMatConfByConferenceseries|
= 15.0, 18-11-2020, BookChapterSeriesAndMatConfByConferenceseries
|Publication indicators||= 1; = 1; = 1.0|
|Citation count*||1 (2021-01-23)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.