abstract
Panel (P) and funnel (F) glasses from Cathode Ray Tube (CRT) have been used to obtain glass foams by a simple and economic processing route, consisting of direct heating the glass powders at relatively low temperatures (650-750 degrees C) using different foaming agents (FA) such as egg shells, calcite, dolomite. Mixtures in different proportions of P and F glass powders were tested and the effects of composition and heat treatment temperature on the foaming behaviour were evaluated. Glass foams featuring apparent density and compressive strength values of 0.29 g/cm(3) and 2.34 MPa, respectively, could be produced from a P/F ratio = 1 with added 3 wt% of egg shells upon heat treating at 700 degrees C for 15 min. The P/F ratio was found to strongly influence the foaming behaviour and, consequently, the physical properties of the final foam glass. The relative performance of other foaming agents under a given set of experimental conditions revealed to be dependent on the type of glass (composition and thermal properties). (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
keywords
CATHODE-RAY TUBES
subject category
Materials Science
authors
Fernandes, HR; Ferreira, DD; Andreola, F; Lancellotti, I; Barbieri, L; Ferreira, JMF
our authors
Hugo Alexandre Gonçalves da Rocha Fernandes
Junior Researcher
José Maria da Fonte Ferreira
Retired ProfessorGroups
G3 - Electrochemical Materials, Interfaces and Coatings
G5 - Biomimetic, Biological and Living Materials
acknowledgements
Hugo R. Fernandes is grateful for the financial support of CICECO (PEst-C/CTM/LA0011/2013) and for the Post doc grant (SFRH/BPD/86275/2012) from the FCT, Portugal.