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Detailed Program
Paper Number : NA-I01
Time Frame : 10:45~11:10
Presentation Date : Friday, 28, November
Session Name : Nano-particles & Nano-structured Materials
Session Chair 1# : Chang-Yeoul Kim
Session Chair 2# : Yamamoto Hayashi
Synthesis and 3D Characterization of Barium-Ferrite Hybrid System with Highly Regulated Structures
Tadachika NAKAYAMA
Nagaoka University of Technology
Keywords: Highly Regulated Structures, 3D Structure Analysis, Barium-Ferrite, Hybrid Materials, X-ray CT scan

The organic-inorganic hybrid system with magnetic fillers has been developed for the electomagnetic wave absorber, magnetic sheet and heating element. The texture and micro structure control of the magnetic fillers is one of the important point on these materials The orientation of Barium-Ferrite particles was controlled in polymer-based nanocomposite film using microscopic molds while applying a DC electric field. The Barium-Ferrite particles were dispersed by sonication in a prepolymer mixture of polysiloxane followed by a high speed mixing. The homogeneous suspension was cast on a microscopic mold with different patterns, which is attached to positive electrode during application of electric field before it became cross-linked. Analysis revealed that filament-like linear assembles of Barium-Ferrite particlewere fabricated in polysiloxane/Barium-Ferrite hybrid films, and Barium-Ferrite particles composing filament-like linear assembles were aligned perpendicular to the film plane with high anisotropy. The structure and dimensions of filament-like linear assembles showed direct relation with thermal property of the composite, and could be changed depending on the type of used microscopic molds. The filament-like linear assemblesformation induced by the type of microscopic molds and intensity of applied electric fields are discussed.
Acknowledgements : This work was supported by JSPS KAKENHI Grant Scientific Research (A), Number 24246108 and 25249108.