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- W3131140854 abstract "Liquid foams containing Al2O3 nanoparticles were obtained after direct foaming of a colloidal alumina suspension with ammonium stearate. These systems were stable for at least 24 h and were comprised by small cells (<35 μm). Up to 10 wt% of these foams were added to an ultrastable Al2O3-stabilised one and resulted in macroporous samples with high total porosity (>70%). Their green mechanical strength was proportional to the amount of colloidal alumina added, but lower than a composition with calcium aluminate cement. When compared with compositions prepared with colloidal alumina suspension, the colloidal foams resulted in samples with a higher number of small pores (<30 μm) and lower linear shrinkage after firing at 1600 °C for 5 h (~9%). Thus, colloidal alumina foams can be used for processing macroporous refractory ceramics with smaller pores, lower dimensional changes after firing and higher porosity." @default.
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- W3131140854 date "2021-06-01" @default.
- W3131140854 modified "2023-10-01" @default.
- W3131140854 title "Direct foaming of macroporous ceramics containing colloidal alumina" @default.
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- W3131140854 doi "https://doi.org/10.1016/j.ceramint.2021.02.086" @default.
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