Abstract
The role of sodium lauryl sulfate (SLS) on pore size of ceramic foams has been investigated using silica foams with 65–70% porosity prepared by a mechanical foaming and gelcasting method. Experiments were carried out to determine bubble size and stability of three-phase foams as well as the pore size of ceramic foams under a range of SLS concentration. Results suggested that pore size of ceramic foams is successfully controlled by changing the SLS concentration of three-phase foam slurries. The controllable range of pore size in this study was roughly 70–150μm, which corresponded to the SLS concentration range between 7×10−3 and 7×10−2M. Furthermore, it was found that the SLS concentration significantly influenced on the foam stability during post-foaming processes as well as the initial bubble size.
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