期刊
CERAMICS INTERNATIONAL
卷 43, 期 9, 页码 6730-6737出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2017.02.078
关键词
Vitrocrystalline foams; Oyster shells; Thermal insulators
资金
- CAPES
- FAPESC/CNPq [17431/2011-9]
In this work discarded glass bottles (GB) of different colors and oyster shells, OS (1-15 wt%) as pore forming agent were used to produce vitrocrystalline foams. Homogenized powders of the formulated compositions were uniaxially pressed (20 MPa) and the obtained compacts were fired at different temperatures (800-950 degrees C) and holding times (30-120 min), in order to investigate the effect of the oyster shell additions on the microstructure and properties of the processed vitrocrystalline foams. The best ratio between the used wastes and resulting porosity was obtained for a composition containing 91 wt% GB and 9 wt% OS fired at 900 degrees C in the 30-120 min holding time range (optimized thermal cycle). In this case, porosity varied from 81% to 91% while the thermal conductivity and compressive strength varied between 0.057 and 0.077 W/m K and from 1.00 to 2.33 MPa, respectively.
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