3. Res ults and discus sion
It should be noted that wet foams investigated in this study
are quite complex systems. A series of situations are involved
in the stabilization process, including the adsorption of shortchain amphiphilic molecules on the particle surface, and the
adsorption of in situ-hydrophobized ceramic powders to the
air–water interface of freshly air bubbles. Therefore, changes
in the initial composition of suspension often affect more than
one of the parameters relevant for foam formation and
stabilization. In this paper, two important parameters, the
concentration of valeric acid and pH value of the final slurry,
were investigated independently.