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Injection molding permanent magnet composite material containing polyphenylene sulfide and preparation method thereof

A composite material and polyphenylene sulfide technology, which is applied in the field of injection molding permanent magnet composite materials and their preparation, can solve the problems of the influence of the magnetic properties of the composite material, the poor fluidity of the composite melt, and the difficulty in resin mixing, and achieve excellent magnetic properties and anti-resistance. Corrosion performance, excellent low temperature impact toughness, the effect of alleviating the decrease of coercivity

Active Publication Date: 2012-06-20
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although the performance of the PPS / NdFeB permanent magnet composite material meets the requirements, there are the following problems: due to the limitation of rare earth resources, the cost of NdFeB magnetic powder is also very high (the price of rare earth Nd has exceeded 1000 yuan / kg), which greatly limits the permanent magnet composite material. Large-scale production; PPS resin injection molding temperature is high (generally above 300°C), NdFeB magnetic powder has poor oxidation resistance, and the magnetic properties of the composite material after injection molding are affected; NdFeB magnetic powder has large particle size and irregular shape, and it is difficult to fully mix with resin. It leads to relatively poor fluidity of the composite melt during injection molding, which affects the performance of the composite material
However, the coercive force of the ferrite permanent magnet is very low, and the coercive force of the injected multi-pole rotor magnet is also very low, and the ability to resist external magnetic field interference is not strong, which will make it difficult for the multi-pole rotor magnet to be stable in a complex electromagnetic environment Work
[0008] To sum up, the various PPS-based injection molding permanent magnet composite materials currently disclosed have some shortcomings, and it is difficult to meet the requirements of excellent performance, environmental protection and energy saving, resource conservation and large-scale production at the same time.

Method used

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  • Injection molding permanent magnet composite material containing polyphenylene sulfide and preparation method thereof
  • Injection molding permanent magnet composite material containing polyphenylene sulfide and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0044] The raw materials of the present embodiment and the mass percentages of each raw material are as follows:

[0045]

[0046] The mixed magnetic powder is composed of NdFeB permanent magnetic powder MQP-B, isotropic samarium iron nitrogen permanent magnetic powder Sm 2 Fe 17 N 2.9 And strontium ferrite permanent magnet powder SrO·6Fe 2 o 3 Composition, the mass percent of each permanent magnetic powder is as follows:

[0047] MQP-B (particle size 54 ~ 150 microns) 96%

[0048] SM 2 Fe 17 N 2.9 (Particle size 5-20 microns) 3%

[0049] SrO·6Fe 2 o 3 (Particle size 5-20 microns) 1%;

[0050] The process steps are as follows:

[0051] (1) Preparation of multi-component composite magnetic powder

[0052] Measure MQP-B permanent magnet powder, Sm according to the mass percentage 2 Fe 17 N 2.9 Permanent magnetic powder and SrO·6Fe 2 o 3 Mixed magnetic powder composed of permanent magnetic powder and coupling agent γ-aminopropyl triethoxysilane (trade name KH...

Embodiment 2

[0060] The raw materials of the present embodiment and the mass percentages of each raw material are as follows:

[0061] Mixed magnetic powder 82.0%

[0062] Polyphenylene sulfide resin powder 17.8%

[0063] γ-(2,3 glycidoxy)propyltrimethoxysilane (trade name KH560) 0.2%;

[0064] The mixed magnetic powder is made of NdFeB permanent magnetic powder Nd 10.5 (FeCoZr) 83.5 B 6 , Isotropic SmFeN permanent magnet powder Sm 2 Fe 17 N 2.9 And strontium ferrite permanent magnet powder SrO·6Fe 2 o 3 Composition, the mass percent of each permanent magnetic powder is as follows:

[0065] Nd 10.5 (FeCoZr) 83.5 B 6 (Particle size 54-150 microns) 60%

[0066] SM 2 Fe 17 N 2.9 (Particle size 5-20 microns) 35%

[0067] SrO·6Fe 2 o 3 (Particle size 5-20 microns) 5%;

[0068] The process steps are as follows:

[0069] (1) Preparation of multi-component composite magnetic powder

[0070] Nd is measured according to the mass percentage 10.5 (FeCoZr) 83.5 B 6 Permanent ma...

Embodiment 3

[0078] The raw materials of the present embodiment and the mass percentages of each raw material are as follows:

[0079]

[0080] The mixed magnetic powder is composed of NdFeB permanent magnetic powder MQP-A, isotropic samarium iron nitrogen permanent magnetic powder Sm 2 Fe 17 N 2.9 And strontium ferrite permanent magnet powder SrO·6Fe 2 o 3 Composition, the mass percent of each permanent magnetic powder is as follows:

[0081] MQP-B (particle size 54-150 microns) 50%

[0082] SM 2 Fe 17 N 2.9 (Particle size 5-20 microns) 5%

[0083] SrO·6Fe 2 o 3 (Particle size 5-20 microns) 45%;

[0084] The process steps are as follows:

[0085] (1) Preparation of multi-component composite magnetic powder

[0086] Measure MQP-B permanent magnet powder, Sm according to the mass percentage 2 Fe 17 N 2.9 Permanent magnetic powder and SrO·6Fe 2 o 3 Mixed magnetic powder composed of permanent magnetic powder and coupling agent γ-(2,3 glycidoxy)propyltrimethoxysilane (trad...

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Abstract

An injection molding permanent magnet composite material containing polyphenylene sulfide includes the following components by mass: 78% to 91% of mixed magnetic powder, 8% to 21% of polyphenylene sulfide resin and 0.05% to 1% of coupling agents. The mixed magnetic powder includes the following components by mass: 50% to 96% of neodymium iron boron permanent magnetic powder, 1% to 49% of samariumiron nitrogen permanent magnetic powder and 1% to 45% of ferrite permanent magnetic powder. A preparation method of the injection molding permanent magnet composite material includes the following processing steps: (1) preparing multi-element composite magnetic powder, (2) mixing and pelleting and (3) injection molding.

Description

technical field [0001] The invention belongs to the field of bonded permanent magnet composite materials, in particular to an injection molding permanent magnet composite material composed of three kinds of permanent magnet powder and polyphenylene sulfide resin and a preparation method thereof. Background technique [0002] The injection molding permanent magnet composite material is composed of permanent magnet powder (permanent ferrite powder, rare earth NdFeB NdFeB magnetic powder, etc.) and polymer resin (nylon PA series resin, thermoplastic polyester elastomer TPEE, etc.). Magnetic devices have the characteristics of complex shape, high dimensional accuracy and excellent magnetic properties, and are widely used in household appliances, instruments, automobile industry, electronic information and other fields. [0003] The CFCs (chlorofluorocarbons) and HCFCx (hydrochlorofluorocarbons) refrigerants (ie Freon) widely used in refrigeration appliances and equipment such as...

Claims

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Application Information

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IPC IPC(8): C08L81/02C08K3/38C08K3/28C08K3/22B29C45/77B29C45/78
Inventor 刘颖李军杨凯
Owner SICHUAN UNIV
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