Plastic and nonmetallic article shaping or treating: processes – Formation of solid particulate material directly from molten... – With subsequent uniting of the particles
Patent
1995-06-27
1997-08-26
Mayes, Melvin
Plastic and nonmetallic article shaping or treating: processes
Formation of solid particulate material directly from molten...
With subsequent uniting of the particles
264 34, 264 7, 264125, 264611, 423138, 423151, 423594, 501126, 427212, C01B 1334, C01G 4900, C04B 35622
Patent
active
056607725
ABSTRACT:
A process for producing ultra-fine barium hexaferrite particles. In the first step of this process, a ceramic precursor material containing barium and trivalent ferric cations, a nitrogen-containing material, a solvent, and an anion capable of participating in an anionic oxidation-reduction reaction with the nitrogen-containing material, is provided. In the second step of the process, droplets of such ceramic precursor material are formed. In the third step of the process, the droplets are dried until particles which contain less than about 15 weight percent of solvent are produced. In the fourth step of this process, such particles are ignited in an atmosphere which contains substantially less than about 60 weight percent of the solvent's saturation value in such atmosphere.
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Ostrander Steven P.
Pietras John D.
Schulze Walter A.
Stangle Gregory C.
Venkatachari Koththavasal R.
Alfred University
Greenwald Howard J.
Mayes Melvin
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