Use of Magnetic and Non-Magnetic Fractions of Coal Ash in the Preparation of Glazes from Waste Materials

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61989100%3A27360%2F25%3A10259290" target="_blank" >RIV/61989100:27360/25:10259290 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.wasteforum.cz/cisla/WF_4_2025.pdf" target="_blank" >https://www.wasteforum.cz/cisla/WF_4_2025.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Use of Magnetic and Non-Magnetic Fractions of Coal Ash in the Preparation of Glazes from Waste Materials

Popis výsledku v původním jazyce

The paper deals with the use of magnetic and non-magnetic fractions of coal combustion ash for the preparation of ceramic glazes with waste glass. The aim of the study was to verify the suitability of these secondary raw materials for the production of so-called waste-derived glazes with various functional and aesthetic properties. The physical (particle size distribution, specific surface area) and chemical properties of the individual materials were analysed experimentally. The proposed glaze mixtures were applied to two types of ceramic substrates and fired at 1060 °C and 1200 °C. Colour parameters and possible glaze defects after firing were also examined.Based on the results, it can be concluded that magnetic fractions with a higher Fe₂O₃ content generate darker, more saturated shades suitable for dark decorative glazes. In contrast, non-magnetic fractions with higher Al₂O₃ content and lower iron content allow the formation of matte or lighter glazes. The function of waste glass contributes to good fusibility and enables the formation of light, glossy glazes thanks to its high SiO₂ content and the presence of fluxes Na₂O and CaO. The study further confirms that the composition of the raw materials, their ratio, and the firing temperature significantly affect the colour and properties of the glazes. The findings support the use of coal ash and waste glass in the ceramic industry and offer an alternative to primary raw materials.

Název v anglickém jazyce

Use of Magnetic and Non-Magnetic Fractions of Coal Ash in the Preparation of Glazes from Waste Materials

Popis výsledku anglicky

The paper deals with the use of magnetic and non-magnetic fractions of coal combustion ash for the preparation of ceramic glazes with waste glass. The aim of the study was to verify the suitability of these secondary raw materials for the production of so-called waste-derived glazes with various functional and aesthetic properties. The physical (particle size distribution, specific surface area) and chemical properties of the individual materials were analysed experimentally. The proposed glaze mixtures were applied to two types of ceramic substrates and fired at 1060 °C and 1200 °C. Colour parameters and possible glaze defects after firing were also examined.Based on the results, it can be concluded that magnetic fractions with a higher Fe₂O₃ content generate darker, more saturated shades suitable for dark decorative glazes. In contrast, non-magnetic fractions with higher Al₂O₃ content and lower iron content allow the formation of matte or lighter glazes. The function of waste glass contributes to good fusibility and enables the formation of light, glossy glazes thanks to its high SiO₂ content and the presence of fluxes Na₂O and CaO. The study further confirms that the composition of the raw materials, their ratio, and the firing temperature significantly affect the colour and properties of the glazes. The findings support the use of coal ash and waste glass in the ceramic industry and offer an alternative to primary raw materials.

Druh

J_SC - Článek v periodiku v databázi SCOPUS

CEP obor

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OECD FORD obor

20500 - Materials engineering

Projekt

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Návaznosti

S - Specificky vyzkum na vysokych skolach

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Waste Forum

ISSN

1804-0195

e-ISSN

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Svazek periodika

Neuveden

Číslo periodika v rámci svazku

4

Stát vydavatele periodika

CZ - Česká republika

Počet stran výsledku

10

Strana od-do

337-346

Kód UT WoS článku

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EID výsledku v databázi Scopus

2-s2.0-105028480572