Uniform spherical inorganic particles

Finally, it is possible to produce aerosols by vaporization of solids and subsequent condensation, which under certain conditions may yield uniform spherical particles as shown on examples of NaCl (19-23), AgCl (24-26), V2Os (27), etc. It is quite apparent that all these techniques are based on physical changes of the matter that do not involve chemical reactions, while the emphasis in this chapter is on using the described aerosol technique to produce inorganic materials, in particular metal oxides and polymers, by chemical processes. 

In addition to these solution-based synthesis methods, uniform spherical particles of surfactant templated silicas and many other inorganic oxides have been prepared via drying of aerosol droplets of inorganic precursor with surfactant in a volatile solvent.This formation method is discussed in more detail in Section 2.7.3. 

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