Eliandra de Sousa Trichês
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Milton Dellú
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Victor Carlos Pandolfelli
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Fernando dos Santos Ortega
Cellular ceramics have been produced by several methods, giving a wide range of
macrostructures and properties. This work describes a novel route to produce cellular ceramics
based on the gel casting of emulsions consisting in an aqueous ceramic suspension containing
water-soluble organic monomers and an emulsified insoluble liquid phase. The effects of solids
loading and kerosene fraction on the rheological properties of emulsions were characterized.
Samples with different kerosene additions (20, 30, 40 and 50 %vol.) were produced and their green
and sintered densities were measured. The results have shown a good correlation between the
volumetric fraction of kerosene into the emulsion and the porosity of samples. Diametrical
compression was used to evaluate the strength of sintered samples, which varied with the porosity
between 18 and 37 MPa. The cellular structure was analyzed by SEM and revealed isolated pores
for samples with low porosity, which changed to an interconnected network of pores as the porosity
increased.