{"title":"Study of B/M phase transition and phase transition properties of annealing-tuned high phase transition latent heat of W-VO2 nanorods","authors":"","doi":"10.1016/j.vacuum.2024.113664","DOIUrl":null,"url":null,"abstract":"<div><div>Vanadium dioxide (VO<sub>2</sub>) can spontaneously regulate solar heat according to the ambient temperature, and has great application potential as a candidate for smart glass. However, its <em>T</em><sub><em>c</em></sub>, <em>ΔT</em><sub><em>c</em></sub> and <em>ΔH</em> cannot be coordinated at the same time, and commercial use is greatly hindered. W-doped VO<sub>2</sub> powders were prepared by the hydrothermal method under an argon atmosphere. Nanoflowers, nanorods, and other morphologies of W-doped VO<sub>2</sub> were characterized. The test results showed that W doping could reduce the <em>T</em><sub><em>c</em></sub> of VO<sub>2</sub> to 33.5 °C, <em>ΔT</em><sub><em>c</em></sub> < 10 °C, and with high <em>ΔH</em> (<em>ΔH</em> ≈ 36.98 J/g). The phase transition behavior and morphology change mechanism of W-doped VO<sub>2</sub> were investigated. The transformation of B and M phases was controlled by changing the annealing temperature, and W-VO<sub>2</sub>(M) powders with good phase transition properties were finally produced to meet the requirements of the practical application of smart glass materials.</div></div>","PeriodicalId":23559,"journal":{"name":"Vacuum","volume":null,"pages":null},"PeriodicalIF":3.8000,"publicationDate":"2024-09-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Vacuum","FirstCategoryId":"88","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S0042207X24007103","RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q2","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
Abstract
Vanadium dioxide (VO2) can spontaneously regulate solar heat according to the ambient temperature, and has great application potential as a candidate for smart glass. However, its Tc, ΔTc and ΔH cannot be coordinated at the same time, and commercial use is greatly hindered. W-doped VO2 powders were prepared by the hydrothermal method under an argon atmosphere. Nanoflowers, nanorods, and other morphologies of W-doped VO2 were characterized. The test results showed that W doping could reduce the Tc of VO2 to 33.5 °C, ΔTc < 10 °C, and with high ΔH (ΔH ≈ 36.98 J/g). The phase transition behavior and morphology change mechanism of W-doped VO2 were investigated. The transformation of B and M phases was controlled by changing the annealing temperature, and W-VO2(M) powders with good phase transition properties were finally produced to meet the requirements of the practical application of smart glass materials.
期刊介绍:
Vacuum is an international rapid publications journal with a focus on short communication. All papers are peer-reviewed, with the review process for short communication geared towards very fast turnaround times. The journal also published full research papers, thematic issues and selected papers from leading conferences.
A report in Vacuum should represent a major advance in an area that involves a controlled environment at pressures of one atmosphere or below.
The scope of the journal includes:
1. Vacuum; original developments in vacuum pumping and instrumentation, vacuum measurement, vacuum gas dynamics, gas-surface interactions, surface treatment for UHV applications and low outgassing, vacuum melting, sintering, and vacuum metrology. Technology and solutions for large-scale facilities (e.g., particle accelerators and fusion devices). New instrumentation ( e.g., detectors and electron microscopes).
2. Plasma science; advances in PVD, CVD, plasma-assisted CVD, ion sources, deposition processes and analysis.
3. Surface science; surface engineering, surface chemistry, surface analysis, crystal growth, ion-surface interactions and etching, nanometer-scale processing, surface modification.
4. Materials science; novel functional or structural materials. Metals, ceramics, and polymers. Experiments, simulations, and modelling for understanding structure-property relationships. Thin films and coatings. Nanostructures and ion implantation.