  The thermal properties are one of the key parameters to control phase purity
and microstructure of polycrystalline materials. The melting point of the
iron-based BaFe2As2 superconductor (Ba122), which foresees high-field
applications, remains controversial. In this work,
thermogravimetry-differential scanning calorimetry measurements (TG-DSC) of
undoped and Co-doped Ba122 were carried out. Mixtures of elemental metals and
pre-reacted Ba122 powders were prepared to investigate the thermal responses
during in situ and ex situ synthesis routes, respectively. In addition, the
phases and microstructures of the quenched samples were evaluated to elucidate
the observed exothermic/endothermic peaks. Our results suggest that the melting
point of Ba122 is ~1300{\deg}C.
