Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Physical, Thermal, and Chemical Properties of Fly Ash Cenospheres Obtained for Different Sources

Andrei Shishkin*
* ,
Vitaliijs Abramovskis
,
Ilmars Zalite
ORCID logo ,
Ashish Kumar Singh
,
Gundars Mezinskis
,
Vladimir Popov
,
Jurijs Ozolins
Version 1 : Received: 29 December 2022 / Approved: 5 January 2023 / Online: 5 January 2023 (02:31:05 CET)

A peer-reviewed article of this Preprint also exists.

Shishkin, A.; Abramovskis, V.; Zalite, I.; Singh, A.K.; Mezinskis, G.; Popov, V.; Ozolins, J. Physical, Thermal, and Chemical Properties of Fly Ash Cenospheres Obtained from Different Sources. Materials 2023, 16, 2035. Shishkin, A.; Abramovskis, V.; Zalite, I.; Singh, A.K.; Mezinskis, G.; Popov, V.; Ozolins, J. Physical, Thermal, and Chemical Properties of Fly Ash Cenospheres Obtained from Different Sources. Materials 2023, 16, 2035.

Abstract

Cenospheres are hollow particles in fly-ash, a by-product of coal burning, and are widely used as reinforcement for developing low density composites called syntactic foams. This study investigates the physical, chemical, and thermal properties of cenospheres obtained from 3 different sources, CS1, CS2, and CS3, for the development of syntactic foams. Description of floatation method to separate broken particles is given, and it was seen that up to 11 % of the particles were damaged. Post heat treatment samples show development of SiO2 phase in the cenosphere, which is not present in the as received product. CS3 had the highest quantity of Si element, compared to the other two, showing the difference in the source quality. The particle size distribution for CS2 is very narrow while for the others is much broader. All censopheres have porous walls but the morphology of CS2 is the most uniform and smooth. For the application of metallic layer and subsequent consolidation via spark plasma sintering, CS2 was deemed the most physically, thermally, and chemically suitable.

Keywords

Hollow microballons; cenospheres; ceramics phase composition; chemical composition

Subject

Chemistry and Materials Science, Surfaces, Coatings and Films

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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