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@article{1503207,
author = {Romero, AR. and Tamburini, S. and Taveri, G. and Toušek, Jaromír and Dlouhy, I. and Bernardo, E.},
article_location = {Basel},
article_number = {12},
doi = {http://dx.doi.org/10.3390/ma11122545},
keywords = {glass recycling; alkali activation; gel casting; glass foams},
language = {eng},
issn = {1996-1944},
journal = {Materials},
title = {Extension of the 'Inorganic Gel Casting' Process to the Manufacturing of Boro-Alumino-Silicate Glass Foams},
volume = {11},
year = {2018}
}
TY - JOUR
ID - 1503207
AU - Romero, AR. - Tamburini, S. - Taveri, G. - Toušek, Jaromír - Dlouhy, I. - Bernardo, E.
PY - 2018
TI - Extension of the 'Inorganic Gel Casting' Process to the Manufacturing of Boro-Alumino-Silicate Glass Foams
JF - Materials
VL - 11
IS - 12
SP - 1-12
EP - 1-12
PB - MDPI AG
SN - 19961944
KW - glass recycling
KW - alkali activation
KW - gel casting
KW - glass foams
N2 - A new technique for the production of glass foams, based on alkali activation and gel casting, previously applied to soda-lime glass, was successfully extended to boro-alumino-silicate glass, recovered from the recycling of pharmaceutical vials. A weak alkali activation (2.5 M NaOH or NaOH/KOH aqueous solutions) of fine glass powders (below 70 mu m) allowed for the obtainment of well-dispersed concentrated aqueous suspensions, undergoing gelation by treatment at low temperature (75 degrees C). Unlike soda-lime glass, the progressive hardening could not be attributed to the formation of calcium-rich silicate hydrates. The gelation was provided considering the chemical formulation of pharmaceutical glass (CaO-free) to the formation of hydrated sodium alumino-silicate (N-A-S-H) gel. An extensive direct foaming was achieved by vigorous mechanical stirring of partially gelified suspensions, comprising also a surfactant. A sintering treatment at 700 degrees C, was finally applied to stabilize the cellular structures.
ER -
ROMERO, AR., S. TAMBURINI, G. TAVERI, Jaromír TOUŠEK, I. DLOUHY and E. BERNARDO. Extension of the 'Inorganic Gel Casting' Process to the Manufacturing of Boro-Alumino-Silicate Glass Foams. \textit{Materials}. Basel: MDPI AG, 2018, vol.~11, No~12, p.~1-12. ISSN~1996-1944. Available from: https://dx.doi.org/10.3390/ma11122545.
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