Method for controlling the oxygen content in agglomerated molybd

Details Method for controlling the oxygen content in agglomerated molybd Method for controlling the oxygen content in agglomerated molybd

1989-03-20

1991-03-19

Andrews, Melvyn J.

Specialized metallurgical processes, compositions for use therei

Processes

Consolidating metalliferous material by agglomerating,...

C22B 114

Patent

active

050007858

ABSTRACT:
A method is disclosed for controlling the level of oxygen in molybdenum metal powder, which comprises agglomerating and sintering the molybdenum powder, classifying the resulting agglomerated and sintered molybdenum powder to obtain a particle size of from about -200 to about +325 mesh, contacting the resulting classified powder with a sufficient amount of an aqueous solution of hydrogen peroxide containing from about 1% to about 10% by weight of hydrogen peroxide to yield a molar ratio of H.sub.2 O.sub.2 :Mo of from about 2 to about 5 for sufficient time to achieve an oxygen content in the powder of from about 1% to about 15% by weight wherein the major portion of the oxygen is on the surface of the agglomerates, and removing the resulting hydrogen peroxide-treated molybdenum powder agglomerates from the resulting solution.

REFERENCES:
patent: 3973948 (1976-08-01), Laferty
patent: 4146388 (1979-03-01), Lafferty et al.
Ermelin Handbook of Inorganic Chemistry, Supplement, vol. A3, System-No. 53, Springer-Verlag, N.Y., 1983, pp. 122-123.
"Properties of Oxygen Bearing Molybdenum Coatings", published in the Proceedings of the 9th International Thermal Spray Conference, Netherlands, Denhaag, May 19-23, 1980.
Hackh's Chemical Dictionary 4th Ed., McGraw Hill, N.Y., 1969, p. 543.

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