Thermally stable, high temperature, samarium cobalt molding compound

Thermally stable, high temperature, samarium cobalt molding compound

A magnetic compound is formed comprising: (1) 25% to 50% by volume of polyphenylene sulfide (PPS); (2) 50% to 70% by volume of coated samarium cobalt (the coating comprising 1 to 30% Kaolin by weight of the coating and 70 to 99% potassium silicate by volume of the coating); and (3) 0% to 5% by volum...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: NASTAS PAUL R, CARLBERG JAMES
Format: Patent
Sprache:eng
Schlagworte:
BASIC ELECTRIC ELEMENTS
CHEMISTRY
COMPOSITIONS BASED THEREON
ELECTRICITY
INDUCTANCES
MAGNETS
METALLURGY
ORGANIC MACROMOLECULAR COMPOUNDS
SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
THEIR PREPARATION OR CHEMICAL WORKING-UP
TRANSFORMERS
USE OF INORGANIC OR NON-MACROMOLECULAR ORGANIC SUBSTANCES ASCOMPOUNDING INGREDIENTS
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Beschreibung
Zusammenfassung:A magnetic compound is formed comprising: (1) 25% to 50% by volume of polyphenylene sulfide (PPS); (2) 50% to 70% by volume of coated samarium cobalt (the coating comprising 1 to 30% Kaolin by weight of the coating and 70 to 99% potassium silicate by volume of the coating); and (3) 0% to 5% by volume of an internal lubricant. The PPS polymer component of the compound renders the compound amenable to be injection molded to precise tolerances and also has a low coefficient of linear thermal expansion. The samarium cobalt constituent of the compound provides thermal stability. The potassium silicate/kaolin coating separates the PPS from the samarium cobalt, thus preventing degradation (i.e, PPS viscosity reduction) during manufacture.