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Synthesis of monodispersed micaceous iron oxide by the oxidation of iron with oxygen under hydrothermal conditions
Author(s) -
Uchida Satoshi,
Sato Tsugio,
Okuwaki Akitsugu
Publication year - 1993
Publication title -
journal of chemical technology and biotechnology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.64
H-Index - 117
eISSN - 1097-4660
pISSN - 0268-2575
DOI - 10.1002/jctb.280570305
Subject(s) - oxygen , iron oxide , oxide , chemistry , hydrothermal circulation , nuclear chemistry , inorganic chemistry , oxygen pressure , chemical engineering , organic chemistry , engineering
The oxidation behavior of iron powder with oxygen was investigated in 5–25 m NaOH solutions at 5 MPa of oxygen partial pressure and 130–290°C, where m = mol(kg H 2 O) −1 . Monodispersed micaceous iron oxide, α‐Fe 2 O 3 , was synthesized by the oxidation of iron powder with 5 MPa of oxygen in 10–16 m NaOH solutions at 250–270°C. The diameter of micaceous iron oxide greatly changed depending on the reaction conditions such as the temperature, reaction time and concentrations of NaOH and coexisting ions.