作为智能变色材料家族重要成员之一的热致变色材料,其最具代表性的是二氧化钒(VO
2)材料,近年来,随着VO
2材料研究的不断深入,VO
2基镀膜玻璃产业化获得大幅推进,但仍然面临沉积温度高、调光特性低以及膜层稳定性差等诸多挑战。VO
2薄膜的制备方式主要分为两大类:一是化学法,通过水热合成纳米粉体,再由粉体分散涂膜或形成贴膜;二是物理法,通过PVD(以磁控溅射为代表)直接在基板衬底上镀膜形成纳米薄膜;两者相比较,各有优劣。化学法由于纳米颗粒的非连续性,具有等离子共振效应,进而调光性能优异且易于大面积成膜,成本较低,但由于纳米颗粒的比表面积较大,稳定性欠佳;物理法由于连续成膜,成膜质量较高,薄膜致密度好,因而薄膜稳定性较好,但其调光性能较低,不易大面积化,且由于成膜温度高,所以成本较高。本次报告主要针对现有VO
2物理镀膜研究中面临的几大难题,从光学设计、降低制备温度以及分析研究劣化机制等方面介绍近年来的一些研究工作及未来发展趋势。
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