Influence of Preheating Temperature on Solution Combustion Synthesis of Ni–NiO Nanocomposites: Mathematical Model and Experiment

Resumo

Solution combustion synthesis (SCS) is a widely recognized method to synthesize nanoscale materials. In this work, an attempt was made to analytically simulate (using the Semenov method) and evaluate the influence of preheating temperature on flame temperature as well as on physicochemical characteristics of SCS products. Preheating was found to affect combustion temperature only slightly. An increase in preheating temperature led to a decrease in the induction period due to enhanced heating rate and an increase in cooling time as a result of additional exothermic reactions taking place at higher temperatures. Variation in cooling time caused changes in composition and microstructure of product. For the first time, a mathematical model of SCS was suggested.