MANUFACTURE OF MN-ZN BASED FERRITE CORE

PROBLEM TO BE SOLVED: To suppress the loss of Zn in a ferrite core phase during sintering to obtain a low power loss value, by coating an Mn-Zn based ferrite powder on the surface of a molding of a sintered alloy powder mainly contg. Fe2 O3 , MnO and ZnO and sintering it. SOLUTION: When an Mn-Zn bas...

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Bibliographische Detailangaben
Hauptverfasser:	SHO JON ZU, HAN SUN GI, SHIN MYON SUN, HAN YON HO
Format:	Patent
Sprache:	eng
Schlagworte:	ARTIFICIAL STONE BASIC ELECTRIC ELEMENTS CEMENTS CERAMICS CHEMISTRY COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDINGMATERIALS CONCRETE ELECTRICITY INDUCTANCES LIME, MAGNESIA MAGNETS METALLURGY REFRACTORIES SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES SLAG TRANSFORMERS TREATMENT OF NATURAL STONE
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To suppress the loss of Zn in a ferrite core phase during sintering to obtain a low power loss value, by coating an Mn-Zn based ferrite powder on the surface of a molding of a sintered alloy powder mainly contg. Fe2 O3 , MnO and ZnO and sintering it. SOLUTION: When an Mn-Zn based ferrite core mainly contg. Fe2 O3 , MnO and ZnO is sintered, a molding is put in a sintering furnace, an Mn-Zn based ferrite powder is coated at fixed thickness on the molding, and it is sintered wherein for adjusting the atmosphere, the quantity of a gas injected in the sintering furnace is minimized under the condition of holding an equilibrium O partial pressure. By this method the loss of Zn during sintering is effectively reduced and an Mn-Zn based ferrite core having a low loss characteristic in a high frequency range can be easily manufactured.