Magnetic properties of ultrafine magnetite particles and their slurries prepared via in-situ precipitation

Jiwon Lee, Tetsuhiko Isobe, Mamoru Senna

研究成果: Article査読

87 被引用数 (Scopus)

抄録

Ultrafine magnetite particles of 4-10 nm were prepared in aqueous solutions of polyvinylalcohol (PVA) or PVA with partially exchanged carboxyl groups. The mode of agglomeration and dispersion of the particles were different depending on the properties of polymers in the solvent. The dispersion of magnetite particles prepared in PVA 1 wt.% aqueous solution at pH 13.8, was particularly stable. In contrast, those precipitated in an aqueous solution of PVA with 0.1 mol.% exchanged carboxyl groups agglomerated in the form of a chain-like cluster. The magnetic properties were sensitive to the state of agglomeration of the magnetite particles with adsorbed polymers. An increase of the coercive force after ball-milling was observed, due to the formation of the network structure.

本文言語English
ページ(範囲)121-127
ページ数7
ジャーナルColloids and Surfaces A: Physicochemical and Engineering Aspects
109
DOI
出版ステータスPublished - 1996 4 20

ASJC Scopus subject areas

  • 表面および界面
  • 物理化学および理論化学
  • コロイド化学および表面化学

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