Vitrocrystalline Foams Produced from Discarded Glasses Bottles and Pine Scales

Reference	Presenter	Authors (Institution)	Abstract
17-024	Naiane Paiva Stochero	Stochero, N.P.(Universidade Federal de Santa Catarina); Chami, J.R.(Universidade Federal de Santa Catarina); de Moraes, E.G.(Universidade Federal de Santa Catarina); Novaes de Oliveira, A.P.(Universidade Federal de Santa Catarina);	Vitrocrystalline foams from discarded soda-lime-silica glasses (from glass bottles) of different colors and  pines scales (from Araucaria angustifolia) as pore forming agent were successfully obtained envisaging applications where thermal insulation and non–flammability are the main technical requirements. Compositions containing glass powder (d50 < 4 µm),10–60 vol.% of pines scales powder (d50< 229 µm) and BonderPlus (Na2SiO3 solution) were homogenized and uniaxially pressed (20 MPa). The powder compacts were dried at room temperature for 24 h and fired up to 850 °C, 10 °C/min for 30 min. The samples were characterized according to their physical, microstructural, mechanical and thermal properties. The results showed that it is possible to obtain vitrocrystalline foamsconsisting predominantly of cristobalite, with porosity up to 85%, pore size between 100 $\mu$m and 900 $\mathrm{\mu }$m, compressive strength varying from 0.4 to 6 MPa and thermal conductibility varying from 0.04 to 0.08 W/mK. These results are very interesting to obtain materials with controlled porosity for applications where thermal insulation and non-fammability are the main requirements.
<< Back