ni-al2o3 nanocomposite with high specific surface area synthesized by mixture of fuels through solution combustion

This paper investigates the application of a mixture of three types of fuels, namely urea, glycine and hydrazine, for the synthesis of ni-10 wt. % al2o3 nanocomposite using the solution combustion method. nickel and aluminum nitrates are used as an oxidizer. the fuels are used at two different fuel to oxidizer ratios. dsc-tga diagrams prove hydrazine-nitrate reaction system can ignite before nitrate decomposition in contrary to urea-nitrate and glycinenitrate systems. the results showed synthesized alumina at combustion temperatures less than 500°c is amorphous and the combustion temperatures more than 600 °c made alumina crystalline. the measured surface area for the synthesized nanocomposite in air and less than 10 min was 207 m² g^-1. sem and fesem images prove the presence of small porosities in the synthesized nanocomposites. tem image shows synthesized alumina in the nanocomposite has a mean particle size of less than 25 nm.