Iron powder for dust cores

Details Iron powder for dust cores Iron powder for dust cores

H - Electricity

01

F

H01F 1/33 (2006.01) B22F 1/02 (2006.01)

Patent

CA 2700564

Disclosed is an iron powder for dust cores, wherein the surface of each iron powder particle is covered with an oxide film composed of an Si-based oxide in which the atomic number ratio between Si and Fe satisfies the following relation: Si/Fe .gtorsim. 0.8. Consequently, the iron powder enables formation of a dust core having high resistivity and excellent iron loss characteristics, without causing decrease in mechanical strength.

L'invention concerne une poudre de fer pour des noyaux à poudre de fer. La surface de chaque particule de poudre de fer est couverte avec un film d'oxyde composé d'un oxyde à base de Si dans lequel le rapport du numéro atomique entre le Si et le Fe satisfait la relation suivante : Si/Fe = 0,8. Par conséquent, la poudre de fer permet la formation d'un noyau à poudre de fer qui possède une résistivité élevée et d'excellentes caractéristiques de pertes dans le fer sans causer une diminution de la résistance mécanique.

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