Coordinations Compounds as Precursors in the Combustion Synthesis of Oxides

2 Coordination Compounds as Precursors in the Combustion Synthesis of Oxides 

The combustion synthesis provides an interesting alternative to other technique thanks to several attractive advantages such as simplicity of the experimental setup, surprisingly short time between the preparation of precursors and the availability of the final product, easiness of doping, limited agglomeration of the products, and cheapness due to energy saving. 

The parameters which influence the redox reaction include type of fuel, fuel to oxidizer ratio as well as water content [77-82]. In general, a good fuel should tract nonvio-lently, produce nontoxic gases, and acts as a complexant for metal cations [83]. 

The properties of the obtained oxide powders [such as crystalline or amorphous structure, oxidation state of the metal cations, size, surface area, particle clustering, and extent and nature (hard and soft) of agglomeration] are also strongly depended on adopted processing parameters [84]. They are primarily governed by the enthalpy or flame temperature generated during combustion, which is itself dependent on the nature of the fuel and fuel-to-oxidant ratio [85]. 

One of the nitrogen-containing ligands used in combustion synthesis is hydrazine (NjH ) and its derivatives [90]. Hydrazine complexes have low ignition temperature 

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