Structural and dielectric properties of hydrothermally prepared boehmite coatings on an aluminium foil

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• 作者：A. Abram ; A. Eršte ; G. Dražić ; V. Bobnar
• 刊名：Journal of Materials Science: Materials in Electronics
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：27
• 期：10
• 页码：10221-10225
• 全文大小：1,311 KB
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Chemistry
  Optical and Electronic Materials
  Characterization and Evaluation Materials
  
• 出版者：Springer New York
• ISSN：1573-482X
• 卷排序：27

文摘

We report on the synthesis, structure and dielectric properties of hydrothermally prepared hydroxide coatings on an aluminium foil. X-ray diffraction results indicate that this hydrothermally prepared coating consists of sub-micron crystals of boehmite phase [γ-AlO(OH)] which are homogeneously distributed over the whole surface. Crystals, around 200 nm in size have very narrow size distribution, blocky morphology and are densely packed forming the coating with thickness between 1.5 and 2.5 µm. The dielectric response of the boehmite layer is found to be extremely stable, with values of the dielectric constant of 5.5–6.5 over broad temperature (275–350 K) and frequency (1 kHz–1 MHz) ranges. The boehmite layers on the aluminium foil have a potential use for a variety of dielectric/capacitor applications.