The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 01, 2011
Filed:
Dec. 14, 2006
Zhichao LU, Beijing, CN;
Deren LI, Beijing, CN;
Shaoxiong Zhou, Beijing, CN;
Caowei LU, Beijing, CN;
Feng Guo, Beijing, CN;
Jianliang LI, Beijing, CN;
Jun Wang, Beijing, CN;
Tongchun Zhao, Beijing, CN;
Liang Zhang, Beijing, CN;
Zhichao Lu, Beijing, CN;
Deren Li, Beijing, CN;
Shaoxiong Zhou, Beijing, CN;
Caowei Lu, Beijing, CN;
Feng Guo, Beijing, CN;
Jianliang Li, Beijing, CN;
Jun Wang, Beijing, CN;
Tongchun Zhao, Beijing, CN;
Liang Zhang, Beijing, CN;
Advanced Technology & Material Co., Ltd., Beijing, CN;
Central Iron & Steel Research Institute, Beijing, CN;
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.