Powder and method for producing the same

Details Powder and method for producing the same Powder and method for producing the same

B - Operations, Transporting

22

F

B22F 1/02 (2006.01) B22F 1/00 (2006.01) H01F 1/24 (2006.01)

Patent

CA 2708830

The powder of the invention comprises metal powder, an apatite layer covering the metal powder and silica particles attached to the metal powder or apatite layer. The powder of the invention allows annealing to be carried out at high temperature without destruction of the insulating layer during production of powder magnetic cores. The insulating property of the insulating layer is therefore maintained, and a powder magnetic core with sufficiently high magnetic permeability can be obtained.

La présente invention concerne une poudre comportant des particules métalliques, des couches d'apatite recouvrant les particules métalliques, et des particules fines de silice adhérant aux particules métalliques ou aux couches d'apatite. Cette poudre permet un recuit à des températures élevées sans entraîner des fractures d'une couche isolante lors de la production d'un noyau en poudre de fer. Par conséquent, on peut obtenir un noyau en poudre de fer présentant une perméabilité suffisamment élevée tout en maintenant les propriétés isolantes de la couche isolante grâce à l'utilisation de cette poudre.

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