Magnetic properties and thermal behavior of mullite-iron nanocomposite powders

Hao Wang, Wei Min Wang, Zheng Yi Fu, Tohru Sekino, Koichi Niihara

研究成果: Article査読

1 被引用数 (Scopus)

抄録

Mullite based iron magnetic nanocomposite powders were synthesized by reduction of sol-gel prepared mullite-iron oxide solid solution in hydrogen flow. Structural characterization studied by TEM revealed that two types of α-iron nanoparticles existed in mullite matrix. The α-iron nanoparticles with the size around hundreds of nanometers appeared as inter-type grains, while those around 10 nm were embedded in the grains of mullite. The magnetic properties of nanocomposites suggest that the intergranular and intragranular α-iron nanoparticles had the ferromagnetic and superparamagnetic behavior at room temperature, respectively. The oxidation behavior of nanocomposite powders showed that there existed two different oxidation stages of α-Fe nanoparticles.

本文言語English
ページ(範囲)353-356
ページ数4
ジャーナルJournal of Electroceramics
21
1-4 SPEC. ISS.
DOI
出版ステータスPublished - 2008 12月

ASJC Scopus subject areas

  • 電子材料、光学材料、および磁性材料
  • セラミックおよび複合材料
  • 凝縮系物理学
  • 材料力学
  • 電子工学および電気工学
  • 材料化学

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