Thermoanalytical studies have been going on at the Institute of Inorganic Chemistry for nearly 20 years. The present paper wishes to introduce the results of three main fields of the investigations. Primarily, the goal of our studies was the production of complexes of transient metals with ligands containing different N-atoms and also the study of the obtained compounds with other analytical methods. On the other hand the thermal stability of inorganic polymers (especially the silicone-rubber and polyethylene) was examined, ageing estimations were done, and their dependence on the method of their production and on the pre-treatment processes modelling thei...