Spindle-shaped magnetic iron-based alloy particles containing co

Details Spindle-shaped magnetic iron-based alloy particles containing co Spindle-shaped magnetic iron-based alloy particles containing co

1995-05-01

1997-07-08

Wyszomierski, George

Metal treatment

Stock

Magnetic

148310, 148311, 428558, 428570, B22F 926, H01F 120

Patent

active

056456522

ABSTRACT:
The disclosure describes spindle-shaped magnetic iron-based alloy particles containing cobalt and iron as the main ingredients in which the Co content is 1.0 to 50.0 atm % (calculated as Co) based on the total Fe in the spindle-shaped magnetic iron-based alloy particles, and which the spindle-shaped magnetic iron-based alloy particles have an average major axis diameter of 0.05 to 0.18 .mu.m, a size distribution (standard deviation/major axis diameter) of not more than 0.25, an average minor axis diameter of 0.010 to 0.020 .mu.m, an aspect ratio (major axis diameter/minor axis diameter) of 4 to 15, an X-ray crystallite size D.sub.110 of 120 to 180 .ANG., a coercive force of 1720 to 2500 Oe, a saturation magnetization of not less than 110 emu/g, and a saturation magnetization decrement percentage of not more than 17%.

REFERENCES:
patent: 4970124 (1990-11-01), Oltean et al.
patent: 5260132 (1993-11-01), Nakazumi et al.

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