N38 Nickel Plating NdFeB Ring Magnet for High Quality Speaker

  • Model NO.: N35-N52/ D037
  • Shape: as Clients Requirments
  • Grade: N35n52
  • Composition: NdFeB Magnet
  • Processing Tolerance: -0.05~ +0.05mm
  • Trademark: eastar
  • Specification: from35-52
  • HS Code: 8505111000
  • Application: Speaker Magnet, Industrial Magnet, Jewelry Magnet, Solenoid, Motor Magnet
  • Coating: as Clients Requirments Nickel/Zinc...
  • Type: Permanent Magnet
  • Size: D50X15
  • Work Temperature: -30oc ~ +80oc
  • Transport Package: Carton
  • Origin: China, Ningbo
Neodymium permanent Disc  Ring magnets:

1. Materials: Sintered NdFeB / Neodymium magnet
2. Magnet grade:N35,N38,N40....N52, H, SH, UH, EHseries for optional.
3.Surface treatment: Ni, Ni + Cu + Ni, Zn, epoxy, gold, etc.
4. Size: From diameter 1mm up to 80mm, thickness from 0.5mm up to 30mm.
5. Processing tolerance: +-0.05mm

Magnet Parameter data sheet:

Parameter unit Standard Data
Curie Temperature(Tc) ºC 310-380
Maximum Operating Temperature(Tw) ºC 80-200
Hardness Hv 620
Electrical Resistivity Ω.CM 1.8X10-4 ~2.0X10-4
Density(D) g/cm3 7.5~7.65
Recoil Permeability µ rec 1.05
Magnetization Field Strength(Hs) KOe >  30
KA/m >  2400
Bending Strength Mpa 295~345
Temp. Coefficient of Br (aBr) %/ºC -0.11~ -0.12
Temp Coefficient of Hcj (aHcj) %/ºC -0.5~ -0.7

Applications of neodymium magnets:
1) Servomotor, step motor, DC motor and linear motor
2) Loudspeaker, headphone, earphone and microphones
3) Holding system equipment
4) Medical facility
5) Sound device
6) Wind power
7) VCM, MRI
8) Mobile accessory
9) Research and development, as well as many other applications

TypeResidual lndurtion
Br(KGs)Coereive Foree
BHe(KOe)Intrinsic coereive
Force iGe(KOe)Squareness
(Hk/iHe)Max. Energy Product
(BH)max. (MGOe)Max. Openating
Temp. (C)Density

Metal Deactivator 697

Antioxidant 697    cas: 70331-94-1


Chemical name:

2,2-oxamido-bis[ethyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl)] propionate


Introduction:White or off-white powder,melting point 175-177℃,flashing point 206℃.kindling point 273℃,stabilization for heat. Solubility (g/100g solvent):Acetone 10g,Chloroform 35g, Hexane 0.03g, styrene 5g,water 0.01g.


Physical Properties: white  or off-white powder  Assay: ≥98%


Melting range: 174-180℃  Ash: ≤0.1%  Light Transmittance:425nm≥97%  Volatiles: ≤0.5%  


Applications:Antioxidant 697 is a sterically hindered phenolic antioxidant and metal deactivator. It protects polymers against oxidative degradation and metal catalyzed degradation during processing and in end- use applications. This antioxidant also provides long term thermal stabilization properties. This phenolic antioxidant is an excellent,non-discoloring, non-staining antioxidant and thermal stabilizer with outstanding metal deactivation properties. Typical end use applications include wire and cable insulation,film and sheet manufacture as well as automotive parts. Antioxidant 697 will stabilize polypropylene, polyethylene,polystyrene,polyester, EPDM,EVA and ABS.Low volatility, strong synergistic effect with phosphites,other phenols and thioesters,non-staining and non-discoloring, FDA approved for adhesives and polymers.This product has the characteristics of low volatility and no coloring of products. With thiopropanoic acid lipids, phosphoric acid lipids, has a good synergistic effect.Antioxidant 697 has the function of inhibiting the functions of phenol and Lauronamide, so that the product has the dual function of antioxidant and metal reductant.


Packing: Net 25kg/drum,cardboard boxes with plastic liners;or as required.


Storage: Keep away from moisture and overheat.





Metal Deactivator 697

Metal Deactivator 697,Ym Antioxidant Metal Deactivator,Plastic And Metal Material Deactivator

Tianjin Xindafeng Import & Export Trade Co., Ltd. Tangshan KeAo chemical additives Co., Ltd. , http://www.tskaantioxidant.com

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