Preparation and Characteristics of the Ni-Ferrite Encapsulated Mo-Permalloy Powder

Park, Hyun-Kyu; Ji, In-Geol; Oh, Jae-Hee; Ko, Taeg-Yung; Park, Hyun-Kyu; Ji, In-Geol; Oh, Jae-Hee; Ko, Taeg-Yung

doi:2006.43.11.700

J. Korean Ceram. Soc. > Volume 43(11); 2006 > Article

Journal of the Korean Ceramic Society 2006;43(11): 700.
doi: https://doi.org/10.4191/kcers.2006.43.11.700

Preparation and Characteristics of the Ni-Ferrite Encapsulated Mo-Permalloy Powder

Hyun-Kyu Park, In-Geol Ji, Jae-Hee Oh, Taeg-Yung Ko

School of Materials Science and Engineering, Inha University

ABSTRACT

We prepared a Ni-ferrite encapsulated Mo-permalloy powder through simple electroless plating and heat treatment. It was observed that Ni-ferrite particles formed in a spherical form on each Mo-permalloy grain. The microstructure and the magnetic characteristics of the encapsulated powders depended strongly on oxidation time in the heat-treatment. When the powder was oxidized for 60 min, a dense Ni-ferrite layer covered the Mo-permalloy grain, which in turn exhibited high saturation magnetization of 85.8 emu/g. The magnetic core prepared additionally with the encapsulated powder exhibited a resonant frequency of 12 kHz.

Key words: Magnetic core, Ferrite, Permalloy, Ni-ferrite encapsulated, Mo-permalloy