Sol-gel derived pure and doped

SINTERING OF SOL-GEL DERIVED PURE AND DOPED SINGLE OXIDES Sintering of Titania... 

Nitrogen adsorption isotherm on a pure silica sample after drying and calcination is shown in Fig.2. It is of type I, characteristics of microporous materials [47]. The corresponding pore size distribution of this sample is given in Fig.3. As shown, the sol-gel derived silica sample contains microporous (< 2 nm) pores, with an average pore diameter of about 0.6 nm. The pore structure of the pure and alumina doped silica samples is summarized in Table 3. The surface area of sol-gel derived silica is much larger than the sol-gel derived crystalline samples, described in Section 2.1. 

The first review of sintered ceramics obtained starting with sol-gel oxide powders was presented by Devi and Ganguli in a devoted chapter in the same handbook [22]. The review referred to ceramics derived from pure and doped single oxides, pure and doped binary oxides, multicomponent oxides, and composites. 

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