Achieving the particle size and its distribution of silica
nanoparticles depends on the stability of silica sol.
Derjaguin [24] had distinguished three types of stability
of colloidal systems: (1) phase stability, analogous to the
phase stability of ordinary solutions; (2) stability of disperse
composition, the stability with respect to the
change in dispersity (particle size distribution); and (3)
aggregative stability, the most characteristic for colloidal
systems. Colloidal stability means that the particles
do not aggregate at a significant rate. As explained
earlier, an aggregate is used to describe the structure
formed by the cohesion of colloidal particles. So, in
this investigation, we have proved the effect of aging
temperature and time on the stability of silica
nanoparticles.
Effect of aging temperature