Patent
Heat treated ferromagnetic particles
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TLDR
In this paper, the authors describe the use of the Frogged Particles of IRON, NICKEL, COBALT, and OPTIONALLY CHROMIUM SUPERSATURATED with Boron, NITROGEN, or PHOSPHORUS.Abstract:
FERROMAGNETIC ALLOY PARTICLES OF IRON, NICKEL OR COBALT, AND OPTIONALLY CHROMIUM SUPERSATURATED WITH BORON, NITROGEN OR PHOSPHORUS WHICH ARE PREPARED BY REDUCTION OF A SOLUTION CONTAINING SALTS OF THE APPROPRIATE METALS, ARE CONVERTED TO POLYPHASE PARTICLES OF SUBSTANTIALLY UNCHANGED SIZE HAVING IMPROVED MAGNETIC PROPERTIES BY HEATING BELOW THEIR SINTERING TEMPERATURES. THE FERROMAGNETIC PARTICLES ARE USEFUL FOR MAKING MAGNETS AND FOR MAKING MAGNETIC RECORDING MEMBERS.read more
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