During the growth of anodic Al oxide layers water incorporates in the film and therefore influences the intrinsic properties of the oxide formed. In this study, we propose a new approach, based on the use of high-resolution neutron imaging, to visualize and quantify the water content in porous Al oxides as a function of anodizing conditions. Water in these porous films is either incorporated directly in the oxide structure (structural) and/or fills the pores (morphological). This preliminary study demonstrates that the differences in water content of porous anodic Al oxide layers are strongly related to the oxide growth parameters but interestingly cannot be directly correlated to a specific change in the amorphous oxide structure or in the pore morphology. Due to the high sensitivity of high-resolution neutron imaging to small changes in the water content, we furthermore show that the morphological water content in Al oxides formed in sulfuric acid as well as in phosphoric acid is partially reversible upon heat treatment and immersion. High-resolution neutron imaging is also found to be highly sensitive to structural disorder and crystallographic orientations, allowing to identify different crystalline Al oxide samples based on their structural and morphological defect content. This offers new perspectives to study the effect of the hydrogen and/or water incorporation as well as oxide-related structural modifications on Al oxihydroxides in relation to growth parameters, stability, functionalization as well as properties tuning, highly relevant to surface protection and their use as templates.
Optimization of allotropic and hardness of aluminum oxide coating by PEO
等离子体电解氧化（PEO）是生产材料和氧化物涂层的最重要方法之一。用PEO法在铝上制备的涂层具有$α$ -Al $_2$ O $_3$和$γ$ -Al $_2$ O $_3$两种同素异形体.含$α$ $_2$ O $_3$的涂层具有更高的硬度和耐磨性;因此，本研究的主要目标是优化氧化铝同素异形体，以提高PEO法制备的涂层中$α$ $_2$ O $_3$的比例。本研究的结果表明，制备最高相$α$ O $_3$的最佳电解质化合物为2.9 g/l KOH，1.15 g/l Na 4 P 2 O 7，和0.34 g/升的NaAlO 2，以及$α$ O $_3$的最高同素异形拨片与$γ$ $_2$ O $_3$的最高同素异形拨片的比率在最佳工艺条件下，其XRD测试值为0.622，维氏硬度为1648。
Large-area implementation and critical evaluation of the material and fabrication aspects of a thin-film thermoelectric generator based on aluminum-doped zinc oxide
Surface Optimization of Superconducting Aluminum Resonators for Robust Quantum Device Fabrication
Fraunhofer Institut für Elektronische Mikrosysteme und Festkörpertechnologien EMFT（弗劳恩霍夫电子微系统和固态技术研究所）；Center Integrated Sensor Systems (SENS), Universität der Bundeswehr München（联邦国防大学慕尼黑集成传感器系统中心）
