退火调谐高相变潜热 W-VO2 纳米棒的 B/M 相变及相变特性研究

IF 3.8 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY Vacuum Pub Date : 2024-09-18 DOI:10.1016/j.vacuum.2024.113664

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引用次数: 0

摘要

二氧化钒（VO2）可根据环境温度自发调节太阳热量，作为智能玻璃的候选材料具有巨大的应用潜力。然而，二氧化钒的Tc、ΔTc和ΔH不能同时协调，商业应用受到很大阻碍。我们在氩气环境下采用水热法制备了掺 W 的 VO2 粉末。对掺杂 W 的 VO2 的纳米花、纳米棒和其他形态进行了表征。测试结果表明，掺杂 W 能使 VO2 的 Tc 降低到 33.5 °C，ΔTc < 10 °C，并具有较高的ΔH（ΔH ≈ 36.98 J/g）。研究了掺 W VO2 的相变行为和形态变化机理。通过改变退火温度控制了B相和M相的转变，最终制备出具有良好相变特性的W-VO2（M）粉末，满足了智能玻璃材料的实际应用要求。

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Study of B/M phase transition and phase transition properties of annealing-tuned high phase transition latent heat of W-VO2 nanorods

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 T_c, ΔT_c 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 T_c of VO₂ to 33.5 °C, ΔT_c < 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.

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来源期刊

Vacuum 工程技术-材料科学：综合

CiteScore

6.80

自引率

17.50%

发文量

审稿时长

34 days

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.