Title: Free flowing powder and process for producing it

Abstract: Free flowing powders, such as for flame spray applications, are produced by spray drying a slurry of finely divided particles of the metal in a solvent-binder system to produce agglomerates, wherein the binder is a soluble compound of the metal. These agglomerates possess sufficient green strength to be screened and exhibit higher apparent densities than comparable powders agglomerated with conventional organic binders. When these powders are heated in a reducing atmosphere above the decomposition temperature of the binder, the binder converts to base metal and harmless by-products, such as nitrogen and water thus avoiding contamination of the product, equipment and work area usually associated with conventional organic binders.

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Inventors: Laferty, Jr., John M. (Wheat Ridge, CO, US)
Ritsko, Joseph E. (Towanda, PA, US)
Port, David J. (Athens, PA, US)

Application Number: 594734
Filing Date: 1975-07-10
Publication_date: 1976-08-10
Assignee: GTE Sylvania Incorporated (Stamford, CT)
Primary Class(es): 75/244 427/215, 427/216, 427/389, 427/403
Other Classes:
US Patent Ref:

2666696	Jan, 1954	Fredenburgh	75/.
3153585	Oct, 1964	Lafert, Jr.	75/.
3223523	Dec, 1965	Adler	75/212.
3322515	May, 1967	Dittrich et al.	106/1.
3436248	Apr, 1969	Dittrich et al.	427/423.
3617358	Nov, 1971	Dittrich	75/.
3890137	Jun, 1975	Beyer et al.	75/.

Other Refs: 47-18208

May, 1972	JA

Primary Examiner: Stallard, W.
Assistant Examiner:
Attorney: O'Malley; Norman J., Fox; John C., Castle; Donald R.