Title:
RADIO WAVE ABSORBER MATERIAL POWDER AND MANUFACTURE
Document Type and Number:
Japanese Patent JPH04304700
Kind Code:
A
Abstract:
PURPOSE: To provide a simplified manufacturing method for a radio wave absorber material powder which is excellent in terms of radio wave absorbing properties and is made of an Mn-Zn ferrite group.
CONSTITUTION: This invention relates to Mn-Zn ferrite sphere-shaped particles whose average particle diameter ranges from 50 to 150μm. The manufacturing method comprises a granulation process of a raw compound made of Fe2O3 50 to 55mol%, Mn-40mol%, and ZnO 10 to 30mol% into sphere-shaped particles of 60 to 200μm and a burning process at a temperature of 100 to 1350°C and a cooling process.
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Inventors:
IGAKI JIRO
IKEDA YOSHITOSHI
IKEDA YOSHITOSHI
Application Number:
JP6966291A
Publication Date:
October 28, 1992
Filing Date:
April 02, 1991
Export Citation:
Assignee:
KAWASAKI STEEL CO
International Classes:
C01G49/00; H01Q17/00; H05K9/00; (IPC1-7): C01G49/00; H01Q17/00; H05K9/00