Nanosize NiO/MgO/ZrO2 composite
with Mg:Zr molar ratio of 1 was synthesized via
sol-gel citric acid/ethylene glycol method. The heat
treatment in nitrogen atmosphere slowed down
the heat generation during the combustion reactions.
The suitable calcination temperature is 700 ÌC.
The composite possessed high surface area and
good distribution of NiO.