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Composite bonded rare earth permanent magnetic material

A rare earth permanent magnet and magnetic powder technology, applied in the field of alloys, can solve the problems of low cost, small temperature coefficient, low coercivity, etc., achieve easy large-scale industrial production, realize large-scale industrial production, mechanical properties and coercive force improved effect

Active Publication Date: 2015-12-16
JIANGSU RUIXIANG MAGNETIC IND CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The thermal stability of NdFeB rare earth permanent magnet materials is low, but the magnetic properties are very good; the magnetic properties and thermal stability of ferrite permanent magnet materials are poor, but the cost is low; the coercive force of AlNiCo permanent magnet materials is low , but good thermal stability; samarium cobalt permanent magnet material has a low magnetic energy product, but it has the advantages of high Curie temperature, small temperature coefficient, good corrosion resistance, oxidation resistance, stable and reliable magnetic properties, etc.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] A composite bonded rare earth permanent magnet material, comprising the following raw materials in weight percentage, 50% of neodymium iron boron magnetic powder, 20% of ferrite magnetic powder, 10% of alnico magnetic powder, 2% of polytetrafluoroethylene, 0.5% of propyl gallate %, furfural phenol resin 6%, bisphenol F type epoxy resin 3%, silane coupling agent 1.5%, aluminate coupling agent 1%, graphite 0.5%, zinc stearate 0.5%. Example 2:

Embodiment 2

[0019] A composite bonded rare earth permanent magnet material, comprising the following raw materials in weight percentage, 55% of neodymium iron boron magnetic powder, 25% of ferrite magnetic powder, 6% of alnico magnetic powder, 1.5% of polytetrafluoroethylene, 0.4% of propyl gallate %, furfural phenol resin 5%, bisphenol F type epoxy resin 3%, silane coupling agent 1.5%, aluminate coupling agent 1%, graphite 1%, zinc stearate 1%.

Embodiment 3

[0021] A composite bonded rare earth permanent magnet material, comprising the following raw materials in weight percentage, 45% of neodymium iron boron magnetic powder, 25% of ferrite magnetic powder, 10% of alnico magnetic powder, 1% of polytetrafluoroethylene, 0.5% of propyl gallate %, furfural phenol resin 8%, bisphenol F type epoxy resin 5%, silane coupling agent 2%, aluminate coupling agent 1%, graphite 0.5%, zinc stearate 0.5%.

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Abstract

The invention relates to a composite bonded rare earth permanent magnetic material which comprises neodymium iron boron magnetic powder, ferrite magnetic powder, alnico magnetic powder, teflon, propyl gallate, a binding agent and a coupling agent. The rare earth permanent magnetic material is improved on the aspects of mechanical performance and coercivity and is low in cost, high in manufacturing stability and simple in manufacturing method, and large-scale industrial production can be easily achieved.

Description

technical field [0001] The invention belongs to the field of alloys, and in particular relates to a composite bonded rare earth permanent magnet material with greatly improved mechanical properties and coercive force. Background technique [0002] With the development of high technology, people have higher and higher requirements for electronic information products. At present, electronic information complete machine products are developing in the direction of "light, thin, short and small". This puts forward higher requirements for permanent magnet materials used in the electronic information industry. Compared with sintered permanent magnets, bonded permanent magnets, especially high-performance bonded permanent magnets, can obtain products with high dimensional accuracy without post-processing due to their excellent mechanical properties, and can prepare complex shapes and extremely thin rings. The advantages of shape-shaped products and continuous mass-automated produc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F1/09
Inventor 朱新宇张翼方志平仝进峰钱黎峰
Owner JIANGSU RUIXIANG MAGNETIC IND CO LTD
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