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China, Chinese Cheap Magnet Y30 Ferrite Ring Magnets for Speaker Permanent Magnet1 Industrial Products Supplier Manufacturer Details, price list catalog:
China Industrial Products Supplier Manufacturer List Catalog
Magnetic MaterialSintered Ferrite MagnetCeramic Permanent MagnetsPermanent Ring Magnet
Ningbo Hui Hesing Advanced Tech Material Co., Ltd.
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Product Description Ferrite ring speaker magnets1.IntroductionFerrite ring speaker magnets are made of hard ferrites, which have a high coercivity and high remanence after magnetization. These are composed of iron oxide and barium or strontium carbonate. The high coercivity means the materials are very resistant to becoming demagnetized, an essential characteristic for a permanent magnet. They also conduct magnetic flux well and have a high magnetic permeability. 2.Material:Strontium ferrite, SrFe12O19 (SrO·6Fe2O3), a common material for permanent magnet applications.Barium ferrite, BaFe12O19 (BaO·6Fe2O3), a common material for permanent magnet applications. Barium ferrites are robust ceramics that are generally stable to moisture and corrosion-resistant. They are used in e.g. subwoofer magnets and as a medium for magnetic recording, e.g. on magnetic stripe cards.Cobalt ferrite, CoFe2O4 (CoO·Fe2O3), used in some media for magnetic recording. 3.Main features:1.high working temperature2.good corrosion resistance3.high intrinsic coercive force 4.ParameterMax. Operating Temperature°c250HardnessHv480-580Densityg/cm34.8-4.9Relative Recoil Permeabilityμ rec1.05-1.20Saturation Field StrengthkOe10Temperature Coefficient of BrkA/m800Temperature Coefficient of iHc%/°c%/°c-0.20.3Tensile StrengthN/mm2<100Transverse RuptureN/mm2300 5.Typical Properties:Ferrite Typical Physical Properties of Chinese StandardItemGradeRemanence:BrCoercivity:bHcCoercivity:iHcMax Energy ProductBr(mT)Br(Gs)bHc(kA/m)bHc(Oe)iHc(kA/m)iHc(Oe)(BH)max(KJ/m3)(BH)max(MGOe)Y10Isotropic200-2352000-2350125-1601570-2010210-2802640-35206.5-9.50.8-1.2Y25Anistropic360-4003600-4000135-1701700-2140140-2001760-251022.5-28.02.8-3.5Y30Anistropic370-4003700-4000175-2102200-2640180-2202260-277026.0-30.03.3-3.8Y30BHAnistropic 380-4003800-4000230-2752890-3460235-2902950-365027.0-32.53.4-4.1Y33Anistropic410-4304100-4300220-2502770-3140225-2552830-321031.5-35.04.0-4.4Y35Anistropic400-4204000-4200160-1902010-2380165-1952070-245030.0-33.53.8-4.2 6.Applications: barium ferrite magnets are now widely applied in speaker, louderspeaker,Ferrite magnets have largely displaced Alnico magnets in these applications.It is a common magnetic material for electromagnetic instrument pickups. 7.Production Flow DiagramControl of Incoming Goods→Iron Oxide&Barium or Strontium Carbonate →Mixing →Presintering-Calcining →Milling →Add Binder →Granulating →Pressing →Sintering →Grinding →Cleaning →Final Inspection →Magnetising →Finished Production 8.kindly reminderDear customer,you know all of our product are customized. So in order to save your time, our quotation is based on your material, size,coating,magnetization direction and quantity. If you could send us drawing which shows the information in need, that will be better. Trading service1.Delivery time: 20 days after confirm order;2.Port : Ningbo / Shanghai 3.Payment terms:T/T, Paypal , West Union4. Packaging & Shipping Company Information:Established in 1998 with 320 staff members and a registered capital of $1.5 million, Ningbo Hui Hesing Advanced-tech Material Co. Ltd is specialized in manufacturing and selling all kinds of permanent magnetic products. Our products are exported to North and South America, Western Europe, Australia, and Africa, and we have an annual sales volume exceeding $9.6 million. Our target customers are import traders and wholesalers. Some big names have been cooperating with us for over eight years. Our two major advantages over our competitors are that we own raw material factories, and we are located very close to the port for ease of transportation and trading. As such, our prices are competitively priced compared to those of other suppliers. We're also an ISO 9001:2000-certified manufacturer and able to produce up to 1,000 tons of DfES magnets, 8,000 tons of ferrite magnets and over 10 million magnetic assemblies annually.Exhibitions: Packaging & Shipping
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