Flexible rare earth bonded magnet with roll anisotropy and manufacturing method thereof

Abstract

The invention discloses a flexible rare earth bonded magnet with roll anisotropy and a manufacturing method thereof. The magnet comprises the following components in part by mass: 94 to 97 parts of anisotropic rare earth composite permanent magnet powder, 2.8 to 5.5 parts of binder and 0.2 to 0.5 part of processing aid, wherein the anisotropic rare earth composite permanent magnet powder comprises anisotropic ferrite permanent magnet powder, anisotropic samarium-iron-nitrogen permanent magnet powder, anisotropic neodymium-iron-nitrogen permanent magnet powder and neodymium-iron-boron permanent magnet powder with roll anisotropy. The anisotropic rare earth composite permanent magnet powder is subjected to surface treatment by using a surface treatment agent. A permanent magnet product with the thickness of 0.35 to 8mm and the maximum width of 1,000mm can be manufactured by processing the components by a calendering method; the disadvantages of various conventional permanent magnet materials are overcome; and a magnetic material which has a thin wall, large length-diameter ratio, high flexibility and higher magnetic performance can be manufactured under the condition that an oriented magnetic field is not required to be applied.

Description

technical field [0001] The invention relates to the field of magnetic materials, in particular to a calendered anisotropic flexible rare earth bonded magnet and a manufacturing method thereof. Background technique [0002] Permanent magnet materials are an important branch of electronic materials, and their performance directly reflects the development level of electronic materials in a country. With the wide application of high-performance permanent magnet materials in industries such as computers, automobiles, aerospace, office equipment, home appliances and medical treatment, their market demand is increasing year by year. [0003] At present, most of the high-performance permanent magnet materials on the market are rare earth bonded magnets; the so-called rare earth bonded magnet refers to a magnet made by mixing rare earth permanent magnet powder into a certain proportion of binder and following a certain processing technology. The morphology can be divided into rigid ...

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Problems solved by technology

However, both of the above two production processes need to apply a high-energy orientation magnetic field during the forming process, so that the produced rare earth bonded magnets can achieve good orientation effects, and can also make the produced rare earth bonded magnets have higher magnetic properties. can, which makes the production process of rare earth bonded magnets cumbersome and complicated

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