Effect of phase transformation in higher iron silicide on the electrical conductivity of the multiphase system iron silicide-glass. I. Conductivity mechanisms in a composite, prepared on the basis of iron silicides and barium-borosilicate glass

Conductivity mechanisms for a composite based on cermet containing iron and barium borosilicate glasses are studied. It is established that in the region of elevated (above room) temperatures the resistance of a composite is mainly governed by the conducting properties of metal inclusions consisting of iron silicides and monoboride. In the low-temperature region (T<260 K) With T≲180 K transfer of charges is caused by the passage of electrons beconductivity is noticeably affected by a glass-crystalline component. With T≲180 K transfer of charges is caused by the passage of electrons between donors and traps, whereas at higher temperatures the most probable transfer mechanism is thermal activation of electron from donors directly into the conductivity zone.