Zn-Al₂O₃ Composites with High Aluminum Content and Nanostructured Al₂O₃/ZnO Prepared by Electrochemical Technique from Non-Suspended Solution

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  • ARAKAWA Tomiyuki
    Institute of Science and Technology, Kanto Gakuin University
  • WATANABE Nobuaki
    College of Science and Engineering, Kanto Gakuin University
  • CHOKKI Kenta
    College of Science and Engineering, Kanto Gakuin University
  • YABE Kazuhiro
    Oki Engineering Co., Ltd.
  • KOIWA Ichiro
    College of Science and Engineering, Kanto Gakuin University Graduate School of Engineering, Kanto Gakuin University

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タイトル別名
  • Zn-Al<sub>2</sub>O<sub>3</sub> Composites with High Aluminum Content and Nanostructured Al<sub>2</sub>O<sub>3</sub>/ZnO Prepared by Electrochemical Technique from Non-Suspended Solution

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Zn-Al2O3 composites were electrodeposited from a non-suspended solution containing ZnSO4·7H2O and Al2(SO4)3·14–18H2O using benzyldimethyltetradecylammonium chloride dehydrate (BDTAC) as the additive at an electrodeposition current of 50–500 A/m2 with an air or a nitrogen bubbling. Initial layers with a thickness of approximately 1 µm were observed in the Zn-Al2O3 composite on copper substrates. Furthermore, the Zn-Al2O3 composite was composed of two different crystallographic areas, namely, nano-level size deposited grains with 20–60 nm in width and 100–200 nm in length, and closely packed fine particle deposits with a diameter of approximately 5 nm containing more than 26 atomic% aluminum. The nano-level size deposited grains and the closely packed fine particle deposits comprised nano-size ZnO and θ-Al2O3, respectively. The oxygen concentration in Zn-Al2O3 composite by the air bubbling was higher than that in Zn-Al2O3 composite by the nitrogen bubbling. In contrast, the zinc content ratio in Zn-Al2O3 composite by the air bubbling was lower than that in Zn-Al2O3 composite by the nitrogen bubbling. The aluminum concentration in closely packed fine particle deposits in Zn-Al2O3 composite by the air bubbling was almost the same value as that in Zn-Al2O3 composite by the nitrogen bubbling.

収録刊行物

  • Electrochemistry

    Electrochemistry 85 (6), 315-318, 2017

    公益社団法人　電気化学会

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