Title :
Optimum power-loss and microstructure of MnZn ferrites under consideration of particle size
Author :
Liu, C.S. ; Wu, J.M. ; Tsay, M.J. ; Chen, Chaoteng Jordan
Author_Institution :
Dept. of Mater. Sci. & Eng., Nat. Tsing Hua Univ., Hsinchu, Taiwan
fDate :
9/1/1996 12:00:00 AM
Abstract :
This report deal with the influence of particle size of MnZn ferrite powder on the preparation of monodomain structure. It is found that when samples were sintered at low temperature (1170°C), the power loss and microstructure of MnZn ferrite prepared from powder particle size above 1.3 μm are dominated by sample density. On the other hand, the existence of silica still induce exaggerated grain growth for samples prepared from powder below 1 μm and added with CaO-SiO2 more than 0.1 wt.%. In this study, sample prepared from powder with particle size of 1 μm and added by 0.07 wt.% CaO-SiO 2 exhibits optimum power loss
Keywords :
calcium compounds; eddy current losses; eddy currents; ferrites; grain growth; grain size; magnetic domains; magnetic particles; magnetic permeability; manganese compounds; silicon compounds; zinc compounds; 1 to 1.3 mum; 1170 C; Mn0.72Zn0.22Fe2.06O4 :CaO,SiO2; density; ferrite powder; grain growth; microstructure; monodomain structure; particle size; power loss; sintering; Chemical analysis; Ferrites; Frequency; Loss measurement; Materials science and technology; Microstructure; Powders; Power supplies; Scanning electron microscopy; Temperature;
Journal_Title :
Magnetics, IEEE Transactions on
