Your partner for magnetic solution & high quality magnet

magnetic products

Patent of nd-fe-b materials _ ndfeb strong magnet manufacturers

by:Newland     2020-03-28
Patent of nd-fe-b materials from the perspective of the patent application situation of past years, since 1983, in the general motors corporation and sumitomo special metals co. , LTD developed almost at the same time three components of nd-fe-b alloy under the conditions of ndfeb permanent magnet material patent filings have sprung up. Within this period, the United States, Japan, Europe, the permanent magnet materials manufacturers, research institutes, universities of ndfeb permanent magnet material composition of magnets, magnetic powder preparation process, preparation of anti-corrosion technology, magnet, magnet application to a wide range of research and development, the investment of a large number of manpower and material resources, at the same time to apply for a large number of patents. After has experienced rapid growth, ndfeb permanent magnetic material has been widely concerned. Technology development of ndfeb permanent magnet material then entered into a steady growth. Main show is: patent applications are no longer the blowout type growth, technology mainly focus on process improvement and post-processing.   From the perspective of the content of the application for a patent of calendar year, early in the development of ndfeb permanent magnet material ( 1982 - 1990 years ago) , the main ingredients are NdFeB, including Nd and B phase are too much, so the magnet magnetic pole strength is low, low magnetic energy product. In the middle of the development of ndfeb permanent magnet material ( 1991 - 2003) , in order to improve the magnetic energy product, the inventor of ndfeb permanent magnet material composition for further adjustment, the main change is: 1, the amount of rare earth elements has decreased; 2, total quantity of rare earth elements in the heavy rare earth elements dysprosium ( Dy) , terbium ( Tb) Content is greatly increased; 3, add more alternative metal niobium, aluminum, gallium, cobalt, calcium, zirconium, titanium, etc. ; 4, B content reduced. The composition change, though changed the nd-fe-b magnetic materials, but greatly increased raw material costs, increase the waste of resources. In the later stages of the development of nd-fe-b materials ( 2004 - present) With SC, HD and JM technology, the inventor of ndfeb permanent magnet material composition adjustment, further the main change is: 1, the amount of rare earth elements to further reduce, has been very close to the matrix phase composition; 2, heavy rare earth elements in rare earth elements dysprosium ( Dy) , terbium ( Tb) The content of greatly reduced; 3, replace iron ( Fe) Also greatly reduce or not added, the metal element have special purpose products, only a small amount of added, or add a small amount of copper, aluminum and other relatively cheap metal. The result is a significantly lower cost of raw materials, by improving the process shows the maximum performance of the material.
Custom message
Chat Online 编辑模式下无法使用
Chat Online inputting...