Calculation of Igniton and Adiabatic Temperatures in Al-TiO₂-C System Synthesized from Carbon Coated Method

抄録

Our previous study, production of Al₂O₃-TiC composite powders from carbon coating of TiO₂/Al mixture has shown that there are many advantages of using this method such as nanoparticles, high chemical purity, low cost and so on. In this study, we calculate the adiabatic and ignition temperatures in Al-TiO₂-C system synthesized from carbon coated method. From XRD and DTA results, the initial reaction between Al and TiO₂ leads to the formation of Al₂O₃, Al₃Ti, and Ti₂O₃ according to 5Al + 3TiO₂ → Al₂O₃ + Ti₂O₃ + Al₃Ti whose adiabatic and ignition temperatures are 1630K and 1023K, respectively, which are much lower than those reported ones because carbon coated TiO₂/Al mixture leads to an intimate mixing of the reactant and can be very effective way for the control of reaction path and rate. The ignition and adiabatic temperatures can also be controllable without using any diluents.