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Silicon nitride (Si3N4) foams with three dimensional (3D) interconnected pore structure were prepared by a combination of protein foaming method and sacrificial template method. Hydrophobic epoxy resin (EP) particles were used as the sacrificial template. The hydrophobic character of EP particles enabled them to absorb on to the air–water interface in the foamed slurry, resulting in the formation...
A planetary ball-milling foaming route was employed by the protein foaming method for preparing silicon nitride (Si3N4) foams. In comparison with the commonly used tumbling foaming route of protein foaming method, pores of the Si3N4 foams fabricated by this new foaming route are more uniform in size distribution and the pores pack more compact. Furthermore, effects of the rotating speed on the structure...
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