Electrical Conductivity and High-order Structure FeOOH-Fe<sub>3</sub>O<sub>4</sub>-Amorphous Iron Oxyhydroxides Aggregates

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Other Title
  • FeOOH-Fe<sub>3</sub>O<sub>4</sub>-無定形オキシ水酸化鉄集合系の電気伝導性と高次構造
  • FeOOH-Fe3O4-無定形オキシ水酸化鉄集合系の電気伝導性と高次構造
  • FeOOH Fe3O4 ムテイケイ オキシ スイサンカ テツ シュウゴウケイ

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Description

The change in electrical conductivity of FeOOH-Fe3O4 aggregates with addition of amorphous iron oxyhydroxides (a-oxide) were measured at room temperature and 1kHz to understand the role of a-iron oxides in the high-order structure of the aggregates. The addition of dry a-iron oxides to α-FeOOH-Fe3O4 system increases the conductivity in the α-FeOOH-predominant region and decreases it in the Fe3O4-predominant region. This result suggests that the dry a-iron oxides orientate α-FeOOH crystals in the aggregate and break a chain structure of Fe3O4 crystals; the alternately arrayed structure of α-FeOOH aggregates and Fe3O4 crystalt is kept unchanged not-withstanding the presence of the dry a-iron oxides. On the other hand. the addition of wet a-iron oxides to the α-FeOOH-Fe3O4 binary system transforms the series-type structure into a paralleltype formed by linkage of each constituent, FeOOH or Fe3O4. The role of both the dry and wet a-iron oxides in the γ-FeOOH-Fe3O4 system is similar to that of dry a-iron oxides in the α-FeOOH-Fe3O4 system.

Journal

  • CORROSION ENGINEERING

    CORROSION ENGINEERING 35 (8), 462-466, 1986

    Japan Society of Corrosion Engineering

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