Publication
Title
Development of alumina microspheres with controlled size and shape by vibrational droplet coagulation
Author
Abstract
Monodisperse alumina microspheres were shaped by making use of the vibrational droplet coagulation technique. A combination of both physical and chemical parameters provided a flexible basis to widely regulate the size of the microspheres. The controlled granulation is based on a stable alumina suspension containing sodium alginate. The sodium alginate binder is used to coagulate the microspheres jetted into a bath of CaCl2. Several parameters have been varied to study the impact on the suspensions rheology. This in turn dictates the physical parameters required for controlled shaping by the vibrational droplet coagulation technique. The decomposition of the calcium alginate in the alumina microspheres was monitored during the thermal post processing. In this step, the formation of CaCO3 was revealed, resulting in the presence of CaO during the calcination process. Subsequently, this existence of CaO in the alumina matrix leads to the formation of calcium hexaluminate (CaO·6Al2O3) during sintering.
Language
English
Source (journal)
Journal of the European Ceramic Society. - Barking
Publication
Barking : 2017
ISSN
0955-2219
Volume/pages
37:1(2017), p. 189-198
ISI
000384852400022
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 09.09.2016
Last edited 05.12.2017
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