Production of microcrystalline ferrimagnetic spinels

Chemistry of inorganic compounds – Oxygen or compound thereof – Metal containing

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252 6262, C01G 900, C01G 4900, C01G 5300

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active

044735421

ABSTRACT:
This invention provides an improved process for producing a microcrystalline ferrimagnetic spinel via an amorphous organometallic precursor.
The process produces a high purity ferrite powder such as Ni.sub.0.7 Zn.sub.0.3 Fe.sub.2 O.sub.4 which has an average particle size less than about 1000 angstroms.

REFERENCES:
patent: 3438723 (1969-04-01), Pechini
patent: 3549315 (1970-12-01), Lester et al.
Koppens, "Science of Ceramics-British Ceramic Soc.", Stoke-on-Trent, England, 1976, pp. 101-109.
Oda et al., "Journal of Japan Soc. of Powder & Powder Metallurgy", 29, (5), 1982, pp. 170-175.
Suwa et al., "Proceedings of International Conf.-Ferrites", Sep.-Oct., Japan, 1980, pp. 23-26.
Baythoun et al., "J. of Materials Sci.", 17, 1982, pp. 2757-2769.
Anderton et al., "Powder Metallurgy", #1, 1979, pp. 14-21.

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