Process for treating acicular magnetite containing Co to stabili

Details Process for treating acicular magnetite containing Co to stabili Process for treating acicular magnetite containing Co to stabili

1977-08-01

1979-01-23

Cooper, Jack

Compositions

Magnetic

Iron-oxygen compound containing

252 6255, C01G 4906, C01G 4908

Patent

active

041360494

ABSTRACT:
A process for treating acicular magnetite containing Co to stabilize the magnetic properties thereof comprises the steps of heating acicular magnetite containing 0.1 to 2.5% by atom of Co with respect to Fe as starting material at a temperature in the range of 300 - 1000.degree. C in an inert gas atmosphere in which the partial pressure of oxygen is controlled at a value in the range of 0.001 - 1% by weight and for the time sufficient to homogenize the crystal structure of the acicular magnetite by thermal-diffusion of oxygen thereinto, and thereafter saturating the resultant acicular magnetite with oxygen by heating it at a temperature in the range of 40 - 100.degree. C in an oxygen rich atmosphere such as air.

REFERENCES:
patent: 4015030 (1977-03-01), Sasazawa et al.
patent: 4033891 (1977-07-01), Matsui et al.
patent: 4052326 (1977-10-01), Schoenafinger

Affiliated with

Also associated with

Rating

Process for treating acicular magnetite containing Co to stabili does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Process for treating acicular magnetite containing Co to stabili, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Process for treating acicular magnetite containing Co to stabili will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2272307