Inorganic Sol-Gel Route

The sol-gel processing of materials can refer to a multitude of reaction processes which employ a wide variety of chemical precursors to prepare many different products [30]. According to Kakihana, there are essentially three different kinds of sol-gel routes (i) colloidal sol-gel route (ii) inorganic sol-gel routes and (iii) polymeric sol-gel routes [2]. The primary goal in aU of these sol-gel processes is the preparation of a homogeneous precursor solution from which a homogeneous sohd compound can be obtained. This classification of sol-gel routes is shown in Table 8.1. 

Inorganic sol-gel route Metaloxane polymer Inorganic polymers interconnected by van der Waals or hydrogen bonding Hydrolysis and condensation of metal alkoxides... 

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