Materials and methods The simultaneous TG-DSC curves were obtained by using a
Mettler Toledo TGA-DSC 1stare system. The purge gas was an air
flow. Of 50 mL Min1 and a heating rate of 10 C Min1 was adopted
with, samples weighing about 20 mg. Alumina crucibles were used
to. Record the TG-DSC curves. The DSC curves permitted the
determination of the, thermal events such as exotherm or, endotherm
reactionsAs well as making it possible to determine the
main oxidation temperatures and to calculate the enthalpy (DH).