Specialized metallurgical processes – compositions for use therei – Compositions – Loose particulate mixture containing metal particles
Reexamination Certificate
2006-12-14
2011-11-01
Wyszomierski, George (Department: 1733)
Specialized metallurgical processes, compositions for use therei
Compositions
Loose particulate mixture containing metal particles
C148S105000, C148S403000
Reexamination Certificate
active
08048191
ABSTRACT:
The present invention provides a compound powder for making magnetic powder cores, a kind of magnetic powder core, and a process for making them. Said compound powder is a mixture composing of powder A and powder B, the content of powder A is 50-96 wt % and the content of powder B is 4-50 wt %, wherein powder A is at least one selected from iron powder, Fe—Si powder, Fe—Si—Al powder, Fe-based nanocrystalline powder, Fe-based amorphous powder, Fe—Ni powder and Fe—Ni—Mo powder; powder B bears different requirement characteristics from powder A and is at least one selected from iron powder, Fe—Si powder, Fe—Si—Al powder, Fe-based nanocrystalline powder, Fe-based amorphous powder, Fe—Ni powder and Fe—Ni—Mo powder. Said powder B adopts Fe-based amorphous soft magnetic powder with good insulation property as insulating agent and thus core loss of magnetic powder core decreases. The decrease of magnetic permeability of magnetic powder core resulting from a traditional insulating agent is remedied and the initial magnetic permeability of magnetic powder core is improved by taking advantage of soft magnetic properties of Fe-based amorphous powder.
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English translation of Shimoda JP 2001-068324, published Mar. 16 2001, 28 pages.
English translation of JP '216 to Yasuo Shimoda, JP 2001-196216, published Jul. 19, 2001, 9 pages.
Guo Feng
Li Deren
Li Jianliang
Lu Caowei
Lu Zhichao
Advanced Technology & Material Co., Ltd.
Central Iron & Steel Research Institute
Perkins Coie LLP
Shevin Mark L
Wininger Aaron
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