Alnico magnets
  • What are magnetic assemblies?

    What are magnetic assemblies?

    What are magnetic assemblies? Magnetic assemblies are equipped with permanent magnets like NdFeB magnets and other material parts like metal, stainless steel, plastic, rubber, adhesive tape, wood, hardboard and etc. Magnet assemblies can be much more powerful than magnet itself, and achieve some certain functional effect which magnet cannot meet. Magnetic assemblies are components or devices or systems that combine magnetic & non-magnetic materials with the aim of high magnetic field and cost reduction. They are used for a huge variety of applications including latches, signs, displays, tools, and fixtures. What are the materials of magnetic assemblies? Magnet Alloy: 1. Sintered Neodymium Iron Boron Magnets 2. Bonded Neodymium Iron Boron Magnets 3. Samarium Cobalt Magnets 4. Ferrite Magnets 5. Aluminum Nickel Cobalt Magnets Non-magnet material: 1. Teflon 2. Low-carbon steel 3. ABS, PBT 4. Copper 5. Aluminum 6. Stainless steel 7. Nylon 8. Acrylics What are the common magnetic assemblies? We customize a wide range of magnetic assemblies like pot magnets, rubber coated magnets, magnetic hooks, fishing magnets and office magnets etc. Pot magnets: The structure of conventional pot magnets consists of the permanent magnet, steel shell, and spacer. Sintered Neodymium magnets, sintered Samarium Cobalt magnets, ferrite magnets and AlNiCo magnets are all can be served in the pot magnets. Rubber coated magnets: Rubber coated magnet is strong neodymium magnet protected by a layer of durable black rubber coating. Rubber coated neodymium magnets give great durability and high friction to keep them from slipping on surfaces.  The rubber coating also acts as a protection against chipping and liquids. Fishing magnets: Neodymium Fishing Magnet, Fishing Magnet is made of a super strong neodymium magnet encased inside a nickel plated steel pot. The sintered NdFeB magnet is bonded inside of the pot with strong adhesives. Besides, the steel pot can also protect the magnet from being damaged. The eyebolt will be convenient for us to remove and install fish magnet. Where are magnetic assemblies used for? Assembly Applications: Rotor assemblies for motors and generators Loudspeakers Magnetic pump couplings Halbach arrays Mass spectrometers Magnetic clamping assemblies Sensing and switching assemblies Position sensing (rotary and linear) Linear actuators Hard drives Door security Magnetic couplings Magnetic levitation systems Security tag removal systems
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    18

    May 2021.

  • What are flexible rubber magnets?

    What are flexible rubber magnets?

    What are flexible rubber magnets? Rubber Magnet is a kind of ferrite magnetic material series. It is made of bonded ferrite magnetic powder and synthetic rubber through extrusion molding, calendering molding, injection molding and other processes. It is flexible, elastic and twistable magnets. It can be processed into strips, rolls, sheets, blocks, rings and various complex shapes. Characteristics of Rubber magnetic roll It is flexible, elastic and winding, and can be rolled into sheet, flake, strip, block, ring and all kinds of complex shapes after extrusion, rolling, injection and molding technology. It can also cover PVC, copperplate, double-sided adhesive, UV oil, or color printing in a variety of shapes. The rubber magnetic roll is made up of magnetic powder, CPE and other additives. It is made by extrusion and rolling. Rubber magnets can be isotropic or anisotropic, it can be bending, twisting, and rewinding. It requires no more mechanical processing when it's used. Popular Size of Magnetic sheet roll Length Width Thickness 10M 15M 20M 30M 50Ft 100Ft …. 310mm(12”) 620mm(24”) 1000mm(40”) 1220mm(47”) 1270mm(50”) 1520mm(60”) …. 0.3mm(12mil) 0.4mm(14mil) 0.5mm(20mil) 0.7mm(27.6mil) 0.76mm(30mil) 1.5mm(60mil) …. Other sizes are also available. Magnetic property of Magnetic sheet roll Item Material Finish thickness Magnetic force Standard energy Isotropic Plain brown Matt/Gloss white PVC Colored PVC Vinyl Adhesive Paper …. 0.4mm(16mil) ≥17g/cm2 0.5mm(20mil) ≥22g/cm2 0.7mm(30mil) ≥34g/cm2 High energy Anisotropic 0.4mm(16mil) ≥32g/cm2 0.5mm(20mil) ≥40g/cm2 0.7mm(30mil) ≥60g/cm2 Application of Magnetic sheet roll Magnetic sheet roll can be widely used on different business based on their lamination, they can be the material for fridge magnets, car magnets, promotional magnets and any other finished products. They can be used for display system, POP advertising business ect.
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    18

    May 2021.

  • What are SmCo magnets?

    What are SmCo magnets?

    What are SmCo magnets? A samarium–cobalt (SmCo) magnet, a type of rare-earth magnet, is a strong permanent magnet made of two basic elements samarium and cobalt. Samarium Cobalt (SmCo) magnets are composed of Samarium, Cobalt and Iron, these rare earth magnets are extremely strong for their small size, metallic in appearance and sable physical property .Those magnets could be in simple shapes also could be made according to customer's need. Besides a max working temperature of 300ºC, it has remarkable resistance against corrosion and oxidation. Hence, it may be used in aeronautic and space industries among others. What are features of SmCo magnets? Samarium cobalt magnets are hard and brittle and may chip or break if dropped. They have high magnetic properties Samarium cobalt magnets offer good thermal stability Samarium cobalt magnets are resistant to corrosion Samarium cobalt magnets resistant to demagnetization How are SmCo magnets made? Samarium Cobalt magnets offer strong resistance to demagnetization. All Samarium Cobalt magnets cannot be formed with conventional drilling, turning or milling processes, and must be ground before they are magnetized. Additionally, large or complex assemblies are usually magnetized prior to assembly. Standard tolerances for Samarium Cobalt magnets are +/-.005 for ground dimensions. 1:5 alloy material 1:5 offers 16 MGOe (energy product) to 22 MGOe and is made up of approximately 50% samarium and 50% cobalt. The 1:5 series has a maximum recommended operating temperature of 250°C. SmCo 1:5 magnets require lower field strengths than 2:17 materials to magnetize. In some instances, 1:15 material may be magnetized with multiple poles, provided that a magnetizing fixture is available. 2:17 alloy material 2:17 offers 24 MGOe to 32 MGOe and is composed of about 25% samarium, 5% copper, 18% iron, 2% hafnium or zirconium, with the remainder being cobalt. The 2:17 series of has a maximum operating temperature of 350°C. Special grades of 2:17 are available which can operate to even higher temperatures. SmCo 2:17 requires extremely high magnetizing fields, and multiple pole magnetization is not possible. What are Samarium Cobalt used for? Computer disc drives, sensors, traveling wave tubes, linear actuators, satellite systems, motors
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    17

    May 2021.

  • What are alnico magnets?

    What are alnico magnets?

    What are alnico magnets? Aluminum Nickel Cobalt (AlNiCo) is the first permanent magnet material developed. It is an alloy composed of aluminum, nickel, cobalt, iron and other trace metal elements. The AlNiCo permanent magnet material was successfully developed in the 1930s. At that time, it had the best magnetic properties and a small temperature coefficient, so it was used the most and most widely in permanent magnet motors. After the 1960s, with the advent of ferrite permanent magnets and rare earth permanent magnets, the application of AlNiCo permanent magnets in motors has gradually been replaced, and the proportion of them has shown a downward trend. Common Characteristics of Alnico magnets? 1. Very temperature stable, great for high heat applications 2. Wide range of working temperatures, up to 550ºC 3. May be ground to size 4. Does not lend itself to conventional machining (hard and brittle) 5. High residual induction and energy product compared to ceramic material 6. Low coercive force compared to ceramic and rare earth materials (more subject to demagnetization) How alnico magnets are made? AlNiCo magnets can be classified to cast magnets and sintered magnets according to the manufacturing technology. Alnico magnets are produced by casting or sintering processes. Cast alnico is produced by conventional methods using resin bonded sand molds. Sintered alnico magnets are formed using powdered metal manufacturing methods. Sintering alnico is suitable for complex geometries Alnico magnets produced by casting are greater in density and mass, which gives them better magnetic characteristics and performance. However, sintered Alnico magnets are more economical to produce. Both anisotropic and isotropic variations of Alnico magnets can be produced by sintering or casting. Magnetic Properties of Cast AlNiCo Magnets Grade Remanence Br Coercivity Hcb Max. Energy Product (BH)max Temp. Coefficient Tk Curie Temp. Max. Operating Temperature MMPA Equivalent mT Gs kA/m Oe kJ/m3 MGOe %/℃ (Br) %/℃ (Hcj) ℃ ℃ LN10 600 6000 40 500 10 1.2 -0.02 -0.03 810 450 AlNiCo3 LNG12 700 7000 44 550 12 1.5 -0.02 -0.03 810 450 AlNiCo2 LNG13 680 6800 48 600 13 1.63 -0.02 -0.03 810 450 LNG18 900 9000 48 600 18 2.25 -0.02 -0.03 850 450 AlNiCo4 LNG37 1200 12000 48 600 37 4.63 -0.02 -0.03 860 525 AlNiCo5 LNG40 1250 12500 48 600 40 5 -0.02 -0.03 860 525 LNG44 1250 12500 52 650 44 5.5 -0.02 -0.03 860 525 LNG52 1300 13000 56 700 52 6.5 -0.02 -0.03 860 525 AlNiCo5DG LNG60 1330 13300 60 750 60 7.5 -0.02 -0.03 860 525 AlNiCo5-7 LNGT18 580 5800 90 1130 18 2.25 -0.02 -0.03 860 550 AlNiCo7 LNGT28 1000 10000 58 720 28 3.5 -0.02 -0.03 860 525 AlNiCo6 LNGT32 800 8000 100 1250 32 4 -0.02 -0.03 860 550 AlNiCo8 LNGT38 800 8000 110 1380 38 4.75 -0.02 -0.03 860 550 LNGT44 850 8500 120 1500 44 5.5 -0.02 -0.03 860 550 LNGT48 900 9000 120 1500 48 6 -0.02 -0.03 860 550 LNGT60 950 9500 110 1380 60 7.5 -0.02 -0.03 860 550 LNGT72 1050 10500 112 1500 72 9 -0.02 -0.03 860 550 AlNiCo9 LNGT88 1100 11000 11...
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    17

    May 2021.

  • What are ferrite magnets?

    What are ferrite magnets?

    What are ferrite magnets? Ferrite magnets are permanent magnets mainly made of SrO or BaO and Fe2O3. Compared with other permanent magnets, ferrite magnets are hard and brittle, and have lower magnetic energy. However, it is not easy to demagnetize and corrosion, the production process is simple and the price is low. Therefore, the output of ferrite magnets is the highest in the entire magnet industry and is widely used in industrial production. What are the characteristics of ferrite magnets? Cheapest magnet material Good anti-corrosion performance, no need to surface treatment. Best temperature stability Best choice for industrial application All shapes can be customized provide isotropic and anisotropic How ferrite magnets are made? Ceramic magnets are manufactured using powder technology techniques. The primary raw material – ferrite – is made by using iron oxide and strontium carbonate. These materials are mixed together and then elevated in temperature to 1800-2000 degrees F. At this temperature they undergo a chemical conversion and the resulting material is ferrite. Two manufacturing Process 1. Dry process: By dry process, can produce isotropic & anisotropic magnets;the tool can be changed and developed easily. 2. Wet process: By wet process, only anisotropic magnets can be produced;it is complicated to change the tool and the tooling charge is much higher What are the ways to magnetize ferrite? 1.Isotropic ferrite magnets are not oriented and can be magnetized in any direction; 2.Anisotropic ferrite magnets are different, they are all oriented in the manufacturing direction, and should be magnetized in the direction of orientation. Magnetic properties of sintered permanent ferrite magnet Grade Remanence (Br) Coercivity (HcB) Intrinsic Coercivity(HcJ) (BH)max mT KGauss KA/m KOe KA/m KOe KJ/m³ MGOe Y8T 200~235 2.0~2.35 125-160 1.57-2.01 210-280 2.64-3.51 6.5-9.5 0.8-1.2 Y22H 310~360 3.10~3.60 220-250 2.76-3.14 280-320 3.51-4.02 20.0-24.0 2.5-3.0 Y25 360~400 3.60~4.00 135-170 1.70-2.14 140-200 1.76-2.51 22.5-28.0 2.8-3.5 Y26H-1 360~390 3.60~3.90 200-250 2.51-3.14 225-255 2.83-3.20 23.0-28.0 2.9-3.5 Y26H-2 360~380 3.60~3.80 263-288 3.30-3.62 318-350 3.99-4.40 24.0-28.0 3.0-3.5 Y27H 350~380 3.50~3.80 225-240 2.83-3.01 235-260 2.95-3.27 25.0-29.0 3.1-3.6 Y28 370~400 3.70~4.00 175-210 2.20-3.64 180-220 2.26-2.76 26.0-30.0 3.3-3.8 Y28H-1 380~400 3.80~4.00 240-260 3.01-3.27 250-280 3.14-3.52 27.0-30.0 3.4-3.8 Y28H-2 360~380 3.60~3.80 271-295 3.40-3.70 382-405 4.80-5.08 26.0-30.0 3.3-3.8 Y30H-1 380~400 3.80~4.00 230-275 2.89-3.46 235-290 2.95-3.64 27.0-32.5 3.4-4.1 Y30H-2 395~415 3.95~4.15 275-300 3.45-3.77 310-335 3.89-4.20 27.0-32.0 3.4-4.0 Y32 400~420 4.00~4.20 160-190 2.01-2.39 165-195 2.07-2.45 30.0-33.5 3.8-4.2 Y32H-1 400~420 4.00~4.20 190-230 2.39-2.89 230-250 2.89-3.14 31.5-35.0 3.9-4.4 Y32H-2 400~440 4.00~4.40 224-240 2.81-3.01 230-250 2.89-3.14 31.0-34.0 3.9-4.3 Y33 410~430 4.10~4.30 220-250 2.76-3.14 225-255 2.83-3.20 31.5-35.0 3.9-...
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    17

    May 2021.

  • What is a neodymium iron boron magnet?

    What is a neodymium iron boron magnet?

    What is a neodymium iron boron magnet? A neodymium magnet (also known as NdFeB, NIB or Neo magnet) is the most widely used type of rare-earth magnet. It is a permanent magnet made from an alloy of neodymium, iron, and boron to form the Nd2Fe14B tetragonal crystalline structure. Developed independently in 1984 by General Motors and Sumitomo Special Metals, neodymium magnets are the strongest type of permanent magnet available commercially.Because of different manufacturing processes, they are divided into two subcategories, namely sintered NdFeB magnets and bonded NdFeB magnets. They have replaced other types of magnets in many applications in modern products that require strong permanent magnets, such as electric motors in cordless tools, hard disk drives and magnetic fasteners. What is the composition of neodymium permanent magnet materials? The NdFeB permanent magnet material is a permanent magnet material based on the intermetallic compound Nd2Fe14B. The main components are rare earth elements neodymium (Nd), iron (Fe), and boron (B). The third-generation rare earth permanent magnet NdFeB is the most powerful permanent magnet in contemporary magnets. Its main raw material is 29% rare earth metal neodymium -32.5% metal element iron 63.95-68.65% non-metal element boron 1.1-1.2% add dysprosium 0.6-8% niobium 0.3-0.5% aluminum 0.3-0.5% copper 0.05-0.15% and other elements. What are the characteristics Neodymium magnets? Very high resistance to demagnetization High energy for size Good in ambient temperature Moderately priced Material is corrosive and should be coated for long term maximum energy output Low working temperature for heat applications, but higher levels of heat resistance materials are being introduced periodically How neodymium magnets are made? Technological process: ingredients → smelting ingot/spinning → powder making → profiling → sintering and tempering → magnetic inspection → grinding → pin cutting → electroplating → finished product. Among them, ingredients are the basis, and sintering and tempering is the key step. Magnetic Properties of Sintered Neodymium Magnets Series Grade Remanence Coercive Force Intrinsic Coercive force Max. Energy Product Max.Working Temp. Br Hcb Hci (BH) max L/D=0.7 T kGs KA/m KOe KA/m KOe KJ/m3 MGOe ºC °F N N35 1.17-1.24 11.7-12.4 ≥860 ≥10.8 ≥955 ≥12 263-295 33-37 80 176 N38 1.22-1.30 12.2-13.0 ≥860 ≥10.8 ≥955 ≥12 287-318 36-40 80 176 N40 1.26-1.32 12.6-13.2 ≥860 ≥10.8 ≥955 ≥12 302-334 38-42 80 176 N42 1.29-1.35 12.9-13.5 ≥860 ≥10.8 ≥955 ≥12 318-350 40-44 80 176 N45 1.32-1.38 13.2-13.8 ≥860 ≥10.8 ≥955 ≥12 334-366 42-46 80 176 N48 1.37-1.43 13.7-14.3 ≥836 ≥10.5 ≥876 ≥11 358-390 45-49 80 176 N50 1.40-1.45 14.0-14.5 ≥836 ≥10.5 ≥876 ≥11 374-406 47-51 80 176 N52 1.42-1.48 14.2-14.8 ≥836 ≥10.5 ≥876 ≥11 390-422 49-53 80 176 N54 1.45-1.51 14.5-15.1 ≥836 ≥10.5 ≥876 ≥11 398-438 50-55 80 176 M N35M 1.17-1.24 11.7-12.4 ≥860 ≥10.8 ≥1114 ≥14 263-295 33-37 100 212 N38M 1.22-1.30 12.2-13.0 ≥915 ≥11.5 ≥1114 ≥14 287-3...
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    14

    May 2021.

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