TY - JOUR
T1 - Preparation and characterization of hollow magnetite spheres via a template-free route
AU - Dong, Qiang
AU - Kumada, Nobuhiro
AU - Yonesaki, Yoshinori
AU - Takei, Takahiro
AU - Kinomura, Nobukazu
N1 - Copyright:
Copyright 2018 Elsevier B.V., All rights reserved.
PY - 2010/4
Y1 - 2010/4
N2 - Hollow magnetite (Fe3O4) spheres have been synthesized successfully via a template-free hydrothermal reaction using Fe-naphthenate and LiOH as the starting materials. The average diameter of hollow magnetite spheres prepared at 120°C was about 10μm, and the specific surface area of the product was 68.3 m2/g. The size and morphology of the products depended on the reaction temperature, concentration of LiOH solution and the volume ratio of the oil (Fe-naphthenate) and water phase (LiOH solution). The hollow magnetite spheres exhibit ferromagnetic behavior with saturation magnetization (Ms), remanent magnetization (Mr), and coercivity (Hc) values of ca. 22emu/g, 5emu/g, and 530 Oe, respectively, according to the magnetic hysteresis curve measured at 5K. The possible formation mechanism of hollow magnetite spheres is also discussed.
AB - Hollow magnetite (Fe3O4) spheres have been synthesized successfully via a template-free hydrothermal reaction using Fe-naphthenate and LiOH as the starting materials. The average diameter of hollow magnetite spheres prepared at 120°C was about 10μm, and the specific surface area of the product was 68.3 m2/g. The size and morphology of the products depended on the reaction temperature, concentration of LiOH solution and the volume ratio of the oil (Fe-naphthenate) and water phase (LiOH solution). The hollow magnetite spheres exhibit ferromagnetic behavior with saturation magnetization (Ms), remanent magnetization (Mr), and coercivity (Hc) values of ca. 22emu/g, 5emu/g, and 530 Oe, respectively, according to the magnetic hysteresis curve measured at 5K. The possible formation mechanism of hollow magnetite spheres is also discussed.
KW - Ferromagnetic
KW - Hollow magnetite spheres
KW - Hydrothermal
KW - Template-free
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U2 - 10.2109/jcersj2.118.272
DO - 10.2109/jcersj2.118.272
M3 - Article
AN - SCOPUS:77950799467
SN - 1882-0743
VL - 118
SP - 272
EP - 277
JO - Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
JF - Nippon Seramikkusu Kyokai Gakujutsu Ronbunshi/Journal of the Ceramic Society of Japan
IS - 1376
ER -