Abstract
Alumina foams with porosity of 92.6–94.4 % were obtained by thermally induced foaming of powder dispersions in molten d-glucose monohydrate. Effects of alumina to d-glucose monohydrate weight ratio on the preparation and properties of the alumina foams were investigated. The bubbles generated in molten d-glucose monohydrate were stabilized by alumina particles adsorbed at the gas–liquid interface and the increase in viscosity of the dispersions. The foam rise decreased with the increase in alumina to d-glucose monohydrate weight ratio up to 1.2 and then slightly increased. The alumina foams showed cellular microstructure and the cells had a near spherical morphology. Increasing alumina to d-glucose monohydrate weight ratio widened the cell and window size distribution. The density and compressive strength of the alumina foam showed a maximum at alumina to d-glucose monohydrate weight ratio of 1.2. The corresponding maximum density and compressive strength were 0.293 g/cc and 1.14 MPa, respectively.
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Huang, K., Li, Y., Li, S. et al. Preparation and properties of alumina foams via thermally induced foaming of molten d-glucose monohydrate. J Porous Mater 24, 121–128 (2017). https://doi.org/10.1007/s10934-016-0244-6
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DOI: https://doi.org/10.1007/s10934-016-0244-6