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Preparation of Unsintered Spherical BaFe 12 O 19 Nanoparticles via an Alcohol‐Assisted Spray‐Pyrolysis Route
Author(s) -
Lee Hye Moon,
Bae SunYoung,
Yu JiHun,
Kim YongJin
Publication year - 2008
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.1551-2916.2008.02575.x
Subject(s) - barium ferrite , materials science , crystallinity , crystallization , particle size , nanoparticle , coercivity , spray pyrolysis , alcohol , chemical engineering , nuclear chemistry , analytical chemistry (journal) , ferrite (magnet) , composite material , chromatography , chemistry , nanotechnology , organic chemistry , physics , condensed matter physics , engineering , thin film
Unsintered spherical barium ferrite (BaFe 12 O 19 ) nanoparticles were successfully prepared by the alcohol‐assisted spray‐pyrolysis (AASP) method without any postannealing processes. Ethyl alcohol (EtOH) in the precursor solution for BaFe 12 O 19 particles was very effective not only in its capacity to decrease the particle size, but also in enhancing crystallization into barium ferrite hexagonal phase. As the vol% of EtOH increased from 0 to 20, a decrease of particle size from 136 to 111 nm and an increase of crystallinity were clearly observed. The AASP method was optimized by adjusting the chemical concentration in the precursor solution, and finally, unsintered spherical BaFe 12 O 19 particles, with a geometric mean diameter of 72 nm, a geometric SD of 1.4, and an intrinsic coercivity of 4510 Oe, were successfully prepared.