Enhanced uniformity of zirconia coating for high power lasers via solvent replacement and PEG-doping

IF 2.3 4区材料科学 Q2 MATERIALS SCIENCE, CERAMICS

Journal of Sol-Gel Science and Technology Pub Date : 2024-10-14 DOI:10.1007/s10971-024-06586-4

Wenjie Hu, Ce Zhang, Nini Li, Shengli Wu, Yao Xu

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Abstract

Zirconia coating has a lot of promise when it comes to enhancing the optical performance and laser-induced damage threshold (LIDT) of the mirror in laser systems. In this work, a high LIDT ZrO₂ coating was created using the sol-gel spin coating technique. The anhydrous ethanol solvent was substituted with alcohol ether solvent, and the spin coating technique was employed to achieve a macro homogeneous and flawless ZrO₂ coating. Additionally, organic polymer polyethylene glycol (average Mn 200, PEG200) doping was used to achieve the uniform ZrO₂ coating with LIDT. ZrO₂-PEG composite coatings with consistent LIDT and exceptional optical properties were created. Alcohol ether solvents helped the sol produce a more homogeneous gel coating on the substrate, as demonstrated by the ZrO₂ coating microscope pictures. The LIDT with a 0.5 wt.% PEG200 content was the most uniform. PEG200 organic molecules were able to alter the link state of the ZrO₂ particles. The macroscopic mechanical characteristics of the coatings revealed that the hardness and elastic modulus of the ZrO₂-PEG composite coating were mostly influenced by the PEG200 content. When the PEG200 content was 0.3 wt.%, the hardness and elastic modulus of the ZrO₂-PEG composite coating were the lowest with the highest of the LIDT at 39.25 ± 3.13 J/cm² (@ 1064 nm, 11 ns, 1 mm²).

Graphical Abstract

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通过溶剂置换和 PEG 掺杂提高高功率激光用氧化锆涂层的均匀性

氧化锆涂层在提高激光系统反射镜的光学性能和激光诱发损伤阈值（LIDT）方面大有可为。在这项工作中，利用溶胶-凝胶旋涂技术制作了高 LIDT ZrO2 涂层。用醇醚溶剂代替了无水乙醇溶剂，并采用旋涂技术获得了宏观均匀无暇的 ZrO2 涂层。此外，有机聚合物聚乙二醇（平均锰含量为 200，PEG200）的掺杂被用于实现均匀的 ZrO2 涂层与 LIDT。最终制备出具有一致 LIDT 和优异光学性能的 ZrO2-PEG 复合涂层。正如 ZrO2 涂层显微镜图片所示，醇醚溶剂有助于溶胶在基底上形成更均匀的凝胶涂层。PEG200 含量为 0.5 wt.% 的 LIDT 最为均匀。PEG200 有机分子能够改变 ZrO2 颗粒的链接状态。涂层的宏观机械特性表明，ZrO2-PEG 复合涂层的硬度和弹性模量主要受 PEG200 含量的影响。当PEG200含量为0.3 wt.%时，ZrO2-PEG复合涂层的硬度和弹性模量最低，LIDT最高，为39.25 ± 3.13 J/cm2 (@ 1064 nm, 11 ns, 1 mm2)。

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来源期刊

Journal of Sol-Gel Science and Technology 工程技术-材料科学：硅酸盐

CiteScore

4.70

自引率

4.00%

发文量

280

审稿时长

2.1 months

期刊介绍： The primary objective of the Journal of Sol-Gel Science and Technology (JSST), the official journal of the International Sol-Gel Society, is to provide an international forum for the dissemination of scientific, technological, and general knowledge about materials processed by chemical nanotechnologies known as the "sol-gel" process. The materials of interest include gels, gel-derived glasses, ceramics in form of nano- and micro-powders, bulk, fibres, thin films and coatings as well as more recent materials such as hybrid organic-inorganic materials and composites. Such materials exhibit a wide range of optical, electronic, magnetic, chemical, environmental, and biomedical properties and functionalities. Methods for producing sol-gel-derived materials and the industrial uses of these materials are also of great interest.