TY - JOUR
T1 - Preparation of Silica-Coated Co-Fe3O4 Nanoparticles and their Magnetic Properties
AU - Tago, Teruoki
AU - Hatsuta, Takatoshi
AU - Nagase, Ryo
AU - Kishida, Masahiro
AU - Wakabayashi, Katsuhiko
PY - 2001/1/1
Y1 - 2001/1/1
N2 - Cobalt-modified magnetite (Co-Fe3O4) nanoparticles coated with silica (SiO2) were prepared by using a water-in-oil microemulsion consisting of polyoxyethylen(15)cetylether, cyclohexene and an aqueous solution of FeCl2 and C0Cl2. It is found from TEM observation that the Co-Fe3O4 nanoparticles are located nearly at the center of spherical SiO2 particles, and that the particle size of Co-Fe3O4 is very uniform (ca. 14-17 nm). The coercivity of the nanoparticle increases from 1.17 kA/m to 58.9 kA/m with incrasing amount of Co added. Key words: silica-coated nanoparticle, ferrite, cobalt-modified magnetite, microemulsion, coer-civity.
AB - Cobalt-modified magnetite (Co-Fe3O4) nanoparticles coated with silica (SiO2) were prepared by using a water-in-oil microemulsion consisting of polyoxyethylen(15)cetylether, cyclohexene and an aqueous solution of FeCl2 and C0Cl2. It is found from TEM observation that the Co-Fe3O4 nanoparticles are located nearly at the center of spherical SiO2 particles, and that the particle size of Co-Fe3O4 is very uniform (ca. 14-17 nm). The coercivity of the nanoparticle increases from 1.17 kA/m to 58.9 kA/m with incrasing amount of Co added. Key words: silica-coated nanoparticle, ferrite, cobalt-modified magnetite, microemulsion, coer-civity.
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U2 - 10.1252/kakoronbunshu.27.288
DO - 10.1252/kakoronbunshu.27.288
M3 - Article
AN - SCOPUS:24044464557
SN - 0386-216X
VL - 27
SP - 288
EP - 290
JO - kagaku kogaku ronbunshu
JF - kagaku kogaku ronbunshu
IS - 2
ER -