Product Name: High Quality Rare Earth Permanent Sintered Ring AlNiCo Magnet for Speaker Shape: Ring Application: Electronic Products, Speaker Magnet, Industrial Magnet Place of Origin: Zhejiang, China (Mainland) Certification: Ts/ISO 16949 MOQ: 100PCS Delivery Time: 15-20 Working Days for Prototype or Batch Accordin Payment Terms: T/T L/C or Western Union Paypal Color: Natural Alloy Color Applications: Magnetic Separators , DC and Servo Motors Competitive Advantage: High Temperature Resistance Materials: Samarium Cobalt and Other Rare Earth Materials Transport Package: Cartons HS Code: 85051110 Product Description high quality rare earth permanent sintered ring Alnico magnet for speakerQuick Detail:1. samarium cobalt and other rare earth materials.2. It is permanent rare earth magnet which features high magnetic properties with good stability, resistance to acid corrosion, curie temperature reaches 800-850oC.3. Natural alloy color4. Compliant to RoHS5.All products packed in neutral paper cartonCharacteristics of of permanent SmCo magnet:Curie TempTc°C800~850Coeff. of thermal expansionC //1/°C~8×10-5DensityDg/cm38.3~8.5C1/°C~11×10-5Recoil Permeabilityµrec1.00~1.05Regidity strengthN/m2~1.5×108Max. Working TempTmax°C350Compress strengthN/m2~8×108Electrical ResistivityΩ. Cm~8.6×10-5Tensile strengthN/m23.5×107Vickers HardnessHv500~600young's modulusN/m2~1.2×1011Thermal Conduct RateW/mK~12Magnetization field HakA/m≥1600We have accumulated abundant experience and established stable and credible business relationships with customers worldwide. With rich experience in dealing with all types of large and small orders, we have developed extensive contacts with many local and international freight organizations. Consequently, we are able to ship our goods safely and reliably to almost anywhere in the world.Neodymium Magnets (Neodymium Iron Boron Magnets)also known as NdFeB or Neo magnets, are the most widely-used type of rare earth magnet. It is the strongest type of permanent magnet made from an alloy of Neodymium, Iron, and Boron with the Nd2Fe14B tetragonal crystalline structure. It has replaced other types of magnets in many applications in modern products that require strong permanent magnets, such as motors in cordless tools, hard disk drives, and magnetic fasteners.Physical Properties of NdFeB MagnetDensity(g/cm3)7.3-7.5Curie Temperature (ºC)320Max. Operating Temperature (ºC)220Relative Permeability1.05Flexural Strength (N/nm2)250Compressive Strength (N/nm2)1100Tensile Strength (N/nm2)75Hardness (Hv)550-650Temperature Coefficient of Br (%/ºC)-0.09~-0.12Temperature Coefficient of Hcj (%/ºC)-0.50~-0.65ApplicationsMagnetic separatorsDC and servo motorsSpeaker PartsPrintersMagnetic hooksMRI/NMRPerformance of Sintered Neodymium MagnetsGradeResidual InductionCoercive ForceIntrinsic Coercive ForceMaximum Energy ProductMaximum Operating(Br)(Hc)(Hci)(Bhmax)Temp(G)(mT)(Oe)(kA/m)(kOe) min(kA/m) min(MGOe)(KJ/m3)(°C)N3511700117010900868129553527980N3812200122011300899129553830380N4012500125011400907129554031980N4212800128011500915129554233580N4513200132011600923129554535980N4813800138011600923129554838280N5014000140010000796118765039860N521430014301000079611876524146033M113001130105008361411143326310035M117001170109008681411143527910038M122001220113008991411143830310040M125001250116009231411144031910042M128001280120009551411144233510045M132001320125009951411144535910048M1360013601290010271411144838210050M1400014001300010331411145039810035H117001170109008681713533527912038H122001220113008991713533830312040H125001250116009231713534031912042H128001280120009551713534233512045H132001320121009631713534535912048H137001370125009951713534838212035SH117001170110008762015923527915038SH122001220114009072015923830315040SH125001250118009392015924031915042SH128001280124009872015924233515045SH1320013201260010032015924535915028UH10200102096007642519902822318030UH108001080102008122519903023918033UH11300113010700852Product Tags:powerful permanent magnetelectro permanent magnethigh quality rare earth permanent sintered ring Alnico magnet for speaker