The use of egg shells to produce Cathode Ray Tube (CRT) glass foams
authors Fernandes, HR; Andreola, F; Barbieri, L; Lancellotti, I; Pascual, MJ; Ferreira, JMF
nationality International
author keywords Sintering; Porosity; Glass; Glass foams
abstract Cleaned Cathode Ray Tube (CRT) (panel and funnel) waste glasses produced from dismantling TV and PC colour kinescopes were used to prepare glass foams by a simple and economic processing route, consisting of a direct heating of glass powders at relatively low temperatures (600-800 degrees C). This study reports on the feasibility of producing glass foams using waste egg shells as an alternative calcium carbonate-based (95 wt%) foaming agent derived from food industry. The foaming process was found to depend on a combination of composition, processing temperature and mixture of raw materials (glass wastes). Hot stage microscopy (HSM), X-ray diffraction (XRD) and scanning electron microscopy (SEM) were used to characterize foams and evaluate the foaming ability and the sintering process. The experimental compositions allowed producing well sintered glass foams with suitable properties for some functional applications with environmental benefits such as: (1) reduced energy consumption because of the low heat treatment temperatures used; and (2) materials produced exclusively from residues. (C) 2013 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
issn 0272-8842
year published 2013
volume 39
issue 8
beginning page 9071
ending page 9078
digital object identifier (doi) 10.1016/j.ceramint.2013.05.002
web of science category Materials Science, Ceramics
subject category Materials Science
unique article identifier WOS:000325835100068
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