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Synthesis of Microcrystalline Hematite and Magnetite in Organic Solvents and Effect of a Small Amount of Water in the Solvents
Author(s) -
Kominami Hiroshi,
Onoue Seiichi,
Matsuo Kentarou,
Kera Yoshiya
Publication year - 1999
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1151-2916.1999.tb02022.x
Subject(s) - hematite , magnetite , microcrystalline , chemical engineering , materials science , chemistry , propanol , inorganic chemistry , nuclear chemistry , mineralogy , methanol , organic chemistry , metallurgy , crystallography , engineering
Microcrystalline magnetite (Fe 3 O 4 ) particles having diameters of 7‐34 nm were synthesized by thermal treatment of iron(III) acetylacetonate in organic solvents at high temperatures (423‐573 K) and under autogenous pressures of the solvents. When the treatment was conducted in 1‐propanol containing a small amount of water (1‐3 vol%), nanosized hematite (α‐Fe 2 O 3 ) crystallized, which then was reduced to magnetite after a prolonged reaction time, indicating that a small amount of water in 1‐propanol drastically changed the reaction mechanism for the formation of iron oxides.