Thermal dissociation of intercalated titanium selenides Fe x TiSe2 (x=0.10, 0.25, 0.50)

Using static tensimetry, the selenium pressure during dissociation of intercalated compounds Fe (x) TiSe2 has been measured in a temperature range of stability of the homogeneous material and in the region of decomposition caused by thermal expansion of the polaron band. It has been shown that covalent centers in the stability region of the homogeneous state, which are stabilized by the polaron state of conduction electrons, behave as the effective oxidants lowering the Fermi level. Broadening of the polaron band in the region of a high iron concentration leads to weakening the oxidizing influence of polarons. Iron selenides are formed during the decomposition of intercalated compounds, which leads to an essential non-quasi-binarity of the Fe-TiSe2 system.