Kolbunov V. Synthesis and researches of electrophysical properties of vanadium dioxide basis ceramics

The subject of investigation is a new vanadium dioxide based ceramic material, electrophysical properties and their peculiarities under metal-semiconductor phase transition in vanadium dioxide. The aim of research is to study the physical-technological base of new vanadium dioxide and vanadium-phosphate glasses based ceramic material synthesis; to study the physical reasons of electrical instability of investigated materials; to develop the stabilization methods of these materials. The studying methods are experimental investigation of electrophysical parameters of vanadium dioxide ceramics and modeling of their behavior under ceramics composition change and thermocycling. The basic results - phenomenon of switching in geterogeneous ceramic semiconductors, containing component with metal-semiconductor phase transition, was investigated for the first time; the physical-technological vanadium dioxide ceramics synthesis bases are worked up and such ceramics was made for the first time. The model, which ex plains electrical parameters behavior of vanadium dioxide ceramics under composition change and thermocycling over temperature of phase transition metal-semiconductor, was worked up. Within the frameworks of model, the stabilization ways of vanadium dioxide ceramics electrophysical parameters are proposed. The practical application region is the more effective defense elements of electronic and electrotechnical circuits from currents and thermal overloads on base of the synthesized materials can be created.