Premium
Porous, Sintered Glass‐Ceramics from Inorganic Polymers Based on Fayalite Slag
Author(s) -
Marangoni Mauro,
Arnout Lukas,
Machiels Lieven,
Pandelaers Lieven,
Bernardo Enrico,
Colombo Paolo,
Pontikes Yiannis
Publication year - 2016
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.14224
Subject(s) - fayalite , materials science , microstructure , amorphous solid , porosity , hematite , ceramic , polymer , slag (welding) , phase (matter) , evaporation , compressive strength , composite material , mineralogy , chemical engineering , metallurgy , chemistry , olivine , crystallography , physics , organic chemistry , engineering , thermodynamics
The present paper deals with the synthesis of porous, sintered glass‐ceramics obtained at temperatures below 1150°C, originating from inorganic polymers based on fayalite slag. Firing led to the evaporation of water, dehydroxylation, and oxidation of Fe 2+ above 345°C. For heating >700°C, the Si–O stretching band shifted from the 1160 and 750 cm −1 to the 1255 and 830 cm −1 region, due to a structural reorganization of the amorphous phase, whereas Fe–O bands appeared at 550 cm −1 . The final microstructure consisted predominantly of an amorphous phase, hematite, and franklinite. The open porosity and compressive strength decreased and increased, respectively, as the firing temperature increased. The final values suggest properties comparable to that of structural lightweight concrete, still, the materials synthesized herein, are lighter, and made primarily from secondary resources.