The impact of bead milling on the thermodynamics and kinetics of the structural phase transition of VO2 particulate materials and their potential for use in thermochromic glazing

The thermodynamics and kinetics of the structural phase transition from monoclinic VO2 (M) to rutile (R) vice versa were studied for particulate materials obtained by bead milling powder. Using wet milling, we decreased particle size powder ∼1 μm 129 nm. With progressive switching enthalpy 47 J g−1 29 due a loss crystallinity. using Friedman's differential isoconversional method. activation energy |Eα| decreases with increasing difference between actual temperature material its (T0). Furthermore, kinetic asymmetry is induced. For milled materials, lower switch than opposite switch. hydrothermally synthesized nanoparticles, in same order magnitude, albeit inverse asymmetry. Latter may result different defects that are introduced during both preparation techniques. Applying layers glass sheets yielded thermochromic coatings luminous transmission 40.7% solar modulation 8.3%. This demonstrates particles have potential use efficient windows.