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Title: | 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 | Authors: | CALVI, Lavinia van Geijn, Romy Leufkens, Luc Habets, Roberto Gurunatha, Kargal Laxminarayana Stout, Kathleen MANN, Daniel Papakonstantinou, Ioannis Parkin, Ivan P. ELEN, Ken HARDY, An VAN BAEL, Marlies BUSKENS, Pascal |
Issue Date: | 2022 | Publisher: | ELSEVIER | Source: | Solar energy materials and solar cells, 242 (Art N° 111783) | Abstract: | The thermodynamics and kinetics of the structural phase transition from monoclinic VO2 (M) to rutile VO2 (R) and vice versa were studied for particulate materials obtained by bead milling of VO2 (M) powder. Using wet bead milling, we decreased the particle size of VO2 (M) powder from similar to 1 mu m to 129 nm. With progressive milling, the switching enthalpy decreased from 47 J g(-1) to 29 J g(-1) due to a loss of crystallinity. The switching kinetics were studied using Friedman's differential isoconversional method. The activation energy vertical bar E-alpha vertical bar decreases with increasing difference between the actual temperature of the material and its switching temperature (T-0). Furthermore, vertical bar E-alpha vertical bar decreases with progressive milling, and kinetic asymmetry is induced. For milled particulate materials, vertical bar E-alpha vertical bar is lower for the switch from VO2 (R) to VO2 (M) than for the opposite switch. For hydrothermally synthesized nanoparticles, vertical bar E-alpha vertical bar is in the same order of magnitude, albeit with inverse switching asymmetry. Latter may result from different defects that are introduced during both preparation techniques. Applying layers of milled particulate material to glass sheets yielded thermochromic coatings with luminous transmission of 40.7% and solar modulation of 8.3%. This demonstrates that milled VO2 particles have potential for use in energy efficient thermochromic windows. | Notes: | Buskens, P (corresponding author), Netherlands Org Appl Sci Res TNO, High Tech Campus 25, NL-5656 AE Eindhoven, Netherlands. pascal.buskens@tno.nl |
Keywords: | Vanadium dioxide;Structural phase transition;Isoconversional kinetic analysis;Activation energy;Thermochromic;Coating;Bead milling | Document URI: | http://hdl.handle.net/1942/38022 | ISSN: | 0927-0248 | e-ISSN: | 1879-3398 | DOI: | 10.1016/j.solmat.2022.111783 | ISI #: | 000830160700004 | Rights: | 2022 The Authors. Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/bync-nd/4.0/). | Category: | A1 | Type: | Journal Contribution | Validations: | ecoom 2023 |
Appears in Collections: | Research publications |
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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.pdf | Published version | 7.75 MB | Adobe PDF | View/Open |
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