Sol-gel Method
The base materials for the preparation of precursor sols can be the following materials.

Magnesium Nitrate and Aluminium tertiary butoxide.
Magnesium Nitrate and Boehmite particles
Magnesium Oxide and Boehmite particles
Magnesium Alkoxides and Aluminium Alkoxides

The sol is prepared with the action of nitric acid and the gel formed is dissolved in an alcoholic […]