“…However, there are a few limitations to this. First, during the phase transition, the volume of unit cells of V 2 O 3 changes by 0.8-3.5%, which leads to microcracks in the PTC thermistor and, in turn, to the destruction of materials of arbitrary shape during multiple phase transitions [39]. Secondly, the technology for producing vanadium (III) oxide is more complex than that of barium titanate, which leads to an increase in the cost of production of such a PTC thermistor.…”