Stable silica-based ceramic oxide supports for catalysts some recent developments

14 Stable silica-based ceramic oxide supports for catalysts some recent developments 

As previously described silica, which is an important catalyst support, is polymorphous (figure 3.36). Forms of silica other than quartz (Si02), can be stabilized chemically for use as catalyst support materials. Here we describe EM studies of the chemical stabilization of the cristobalite form of silica. It can be used as a stable catalyst support. 

Structures based on networks of corner-shared tetrahedra of oxygen ions round a central cation are some of the most important in crystal chemistry. Silica-based ceramics belong to such a class of compounds. The cristobalite form of silica has two modifications, a (low) and (high), which are separated 

---