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Corrosion Resistance of Novel Fly Ash-Based Forsterite-Spinel Refractory Ceramics

This article aims to investigate the corrosion resistance of novel fly ash–based forsterite–spinel (Mg(2)SiO(4)-MgAl(2)O(4)) refractory ceramics to various corrosive media in comparison with reactive alumina–based ceramics. Because fly ash is produced in enormous quantities as a byproduct of coal-bu...

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Autores principales: Nguyen, Martin, Sokolář, Radomír
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8879132/
https://www.ncbi.nlm.nih.gov/pubmed/35207911
http://dx.doi.org/10.3390/ma15041363
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author Nguyen, Martin
Sokolář, Radomír
author_facet Nguyen, Martin
Sokolář, Radomír
author_sort Nguyen, Martin
collection PubMed
description This article aims to investigate the corrosion resistance of novel fly ash–based forsterite–spinel (Mg(2)SiO(4)-MgAl(2)O(4)) refractory ceramics to various corrosive media in comparison with reactive alumina–based ceramics. Because fly ash is produced in enormous quantities as a byproduct of coal-burning power stations, it could be utilized as an affordable source of aluminum oxide and silicon oxide. Corrosion resistance to iron, clinker, alumina, and copper was observed by scanning electron microscope with an elemental probe. The influence on the properties after firing was also investigated. Fly ash–based and reactive alumina–based mixtures were designed to contain 10%, 15% and 20% of spinel after firing. Raw material mixtures were sintered at 1550 °C for two hours. X-ray diffraction analysis and scanning electron microscopy were used to analyze sintered samples. The apparent porosity, bulk density, modulus of rupture, and refractory and thermo–mechanical properties were also investigated. The experimental results disclosed that the modulus of rupture, thermal shock resistance and microstructure were improved with increasing amounts of spinel in the fired samples. An analysis of the transition zones between corrosive media and ceramics revealed that all mixtures have good resistance against corrosion to iron, clinker, aluminum and copper.
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spelling pubmed-88791322022-02-26 Corrosion Resistance of Novel Fly Ash-Based Forsterite-Spinel Refractory Ceramics Nguyen, Martin Sokolář, Radomír Materials (Basel) Article This article aims to investigate the corrosion resistance of novel fly ash–based forsterite–spinel (Mg(2)SiO(4)-MgAl(2)O(4)) refractory ceramics to various corrosive media in comparison with reactive alumina–based ceramics. Because fly ash is produced in enormous quantities as a byproduct of coal-burning power stations, it could be utilized as an affordable source of aluminum oxide and silicon oxide. Corrosion resistance to iron, clinker, alumina, and copper was observed by scanning electron microscope with an elemental probe. The influence on the properties after firing was also investigated. Fly ash–based and reactive alumina–based mixtures were designed to contain 10%, 15% and 20% of spinel after firing. Raw material mixtures were sintered at 1550 °C for two hours. X-ray diffraction analysis and scanning electron microscopy were used to analyze sintered samples. The apparent porosity, bulk density, modulus of rupture, and refractory and thermo–mechanical properties were also investigated. The experimental results disclosed that the modulus of rupture, thermal shock resistance and microstructure were improved with increasing amounts of spinel in the fired samples. An analysis of the transition zones between corrosive media and ceramics revealed that all mixtures have good resistance against corrosion to iron, clinker, aluminum and copper. MDPI 2022-02-12 /pmc/articles/PMC8879132/ /pubmed/35207911 http://dx.doi.org/10.3390/ma15041363 Text en © 2022 by the authors. https://creativecommons.org/licenses/by/4.0/Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (https://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Nguyen, Martin
Sokolář, Radomír
Corrosion Resistance of Novel Fly Ash-Based Forsterite-Spinel Refractory Ceramics
title Corrosion Resistance of Novel Fly Ash-Based Forsterite-Spinel Refractory Ceramics
title_full Corrosion Resistance of Novel Fly Ash-Based Forsterite-Spinel Refractory Ceramics
title_fullStr Corrosion Resistance of Novel Fly Ash-Based Forsterite-Spinel Refractory Ceramics
title_full_unstemmed Corrosion Resistance of Novel Fly Ash-Based Forsterite-Spinel Refractory Ceramics
title_short Corrosion Resistance of Novel Fly Ash-Based Forsterite-Spinel Refractory Ceramics
title_sort corrosion resistance of novel fly ash-based forsterite-spinel refractory ceramics
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8879132/
https://www.ncbi.nlm.nih.gov/pubmed/35207911
http://dx.doi.org/10.3390/ma15041363
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