Publication
Title
Impact of inorganic waste fines on structure of mullite microspheres by reaction sintering
Author
Abstract
The impact of waste composition and morphology on the properties of the mullite microstructure were studied by reaction sintering two types of siliceous waste powders with calcined alum sludge. Stoichiometric mixtures of fly ash or rice husk ash with the alum sludge were shaped into mullite microspheres by droplet coagulation. The mullitization reaction was followed by HT-XRD with a distinct difference in onset temperature. The specific powder composition of fly ash (presence of primary mullite) shifted the onset temperature to higher values as compared to the rice husk ash mixture. After sintering at 1600 degrees C, the mullitization reaction resulted in the same yield for both samples. Although the mullite content in the microspheres was equal, distinct differences on the microstructure could be observed. Reaction sintering of the fly ash mixture resulted in lower total porosity with smaller pore sizes.
Language
English
Source (journal)
Journal of the European Ceramic Society. - Barking
Publication
Barking : 2018
ISSN
0955-2219
Volume/pages
38 :6 (2018) , p. 2612-2620
ISI
000427668200019
Full text (Publisher's DOI)
Full text (open access)
Full text (publisher's version - intranet only)
UAntwerpen
Faculty/Department
Research group
Project info
Valorisation of fine-grained inorganic waste streams by means of design into hierarchically structured materials for the use in industrial applications.
Publication type
Subject
Affiliation
Publications with a UAntwerp address
External links
Web of Science
Record
Identification
Creation 04.05.2018
Last edited 25.09.2021
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