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 solution. This is then spray dried and calcined at a temperature of 1000 to 1100oC so as to produce very fine and pure nano particle size spinel powder.
