RARE EARTH MAGNETS PERMANENT MAGNETS

PERMANENT NEODYMIUM(FERRITE)MAGNETS PERMANENT NEODYMIUM(FERRITE)MAGNETS

RARE EARTH MAGNETs (NEODYMIUM , SMCO, ALNICO), PERMANENT MAGNETS HARD FERRIT

PERMANENT NEODYMIUM and HARD FERRIT MAGNETS are dark gray alloy. They are composed of Neodymium, Iron and Boron. Density of Neodymium magnets is .27Lb/in3 (7.5g/cm3).

the basic magnetic parameters for the sintered magnets

sintered magnets (NEODYMIUM)
Characteristics of the magnets Designation measurement Sintered magnets
МС1 МС2 МС3
produit plus d’énergie (BH)max kj/m3 280 220 240
MGOe 35 28 30
remanence Br mT 1200 1020 1050
kG 12.0 10.2 10.5
intrinsic Coercivity Hci kA/m 800 1600 1200
kOe 10.0 20.0 15.0
Coercivity Hcb kA/m 780 760 780
kOe 9.8 9.5 9.8
Temperature coefficient B % / С -0.12 -0.118 -0.12
Температурный коэффициент по Hci % / С -0.7 -0.7 -0.7
Maximum operating temperature -0.7 °C 110 150 130
Material density g/cm3 7.4 7.4 7.4
Ultimate compression strength сж kg/cm2 560 560 560
Modulus of elasticity Е 150 150 150
Всего 7 SINTERED NEODYMIUM MAGNETS

Тоp Neodymium magnets lose -0.09 ~ -0.13% of Br/°C and can work stably under 80°C for low Hci Neodymium magnets and 150°C for high Hci Neodymium magnets.Neodymium magnets are manufactured in a metallurgy process through alloying, crushing, powdering, pressing w/magnetic orientation, sintering, then cutting, coating, inspecting and packing before shipment.

Characteristic comparisons of permanent magnetic materials

permanent MAGNETS
No. Materials (BH)max Hcj BrTc (Work Temper)max Anti-causticity
1 SM1CO5 16-25 15-25 -0.05 200-250 Good
2 SM2CO17 22-30 6-30 -0.03 300-350 Good
3 NdFeB 26-52 12-30 -0.11 80-200 Bad
4 Ferrite magnet >3-4.5 3-4.5 -0.19 200-300 Good
5 AINiCo 5-10 >1-1.8 -0.03 450-500 Excellent
Total 5 TYPLES for Sintered MAGNETS

ТоpNeodymium magnets can be abrasively machined with coolant served to absorb heating and dust. Without coolant, rare earth magnets could crack and chip by the heat produced during high speed cutting or grinding, and the sparks contain the easily oxidized grinding dust that could cause fire!

Comparison of magnetic properties

 

Serial types Characteristic
1 Ceramic it also known as Ferrite, magnets are made of a composite of iron oxide and barium or strontium carbonate. These materials are readily available and at a lower cost than other types of materials used in permanent magnets making it desirable due to the lower cost. Ceramic magnets are made using pressing and sintering. These magnets are brittle and require diamond wheels if grinding is necessary. These magnets are also made in different grades. Ceramic-1 is an isotropic grade with equal magnetic properties in all directions. Ceramic grades 5 and 8 are anisotropic grades. Anisotropic magnets are magnetized in the direction of pressing. The anisotropic method delivers the highest energy product among ceramic magnets at values up to 3.5 MGOe (Mega Gauss Oersted). Ceramic magnets have a good balance of magnetic strength, resistance to demagnetizing and economy. They are the most widely used magnets today.
2 Neodymium Iron Boron It is another type of rare earth magnetic material. This material has similar properties as the Samarium Cobalt except that it is more easily oxidized and generally doesn’t have the same temperature resistance. NdFeB magnets also have the highest energy products approaching 50MGOe. These materials are costly and are generally used in very selective applications due to the cost. Cost is also driven by existing intellectual property rights of the developers of this type of magnet. Their high energy products lend themselves to compact designs that result in innovative applications and lower manufacturing costs. NdFeB magnets are highly corrosive. Surface treatments have been developed that allow them to be used in most applications. These treatments include gold, nickel, zinc and tin plating and epoxy resin coating.
3 Alnico the magnet is made up of a composite of aluminum, nickel and cobalt with small amounts of other elements added to enhance the properties of the magnet. Alnico magnets have good temperature stability, good resistance to demagnetization due to shock but they are easily demagnetized. Alnico magnets are produced by two typical methods, casting or sintering. Sintering offers superior mechanical characteristics, whereas casting delivers higher energy products (up to 5.5 MGOe) and allows for the design of intricate shapes. Two very common grades of Alnico magnets are 5 and 8. These are anisotropic grades and provide for a preferred direction of magnetic orientation. Alnico magnets have been replaced in many applications by ceramic and rare earth magnets.
4 Samarium Cobalt the magnets is a type of rare earth magnet material that is highly resistant to oxidation, has a higher magnetic strength and temperature resistance than Alnico or Ceramic material. Introduced to the market in the 1970’s, samarium cobalt magnets continue to be used today. Samarium cobalt magnets are divided into two main groups: Sm1Co5 and Sm2Co17 (commonly referred to as 1-5 and 2-17). The energy product range for the 1-5 series is 15 to 22 MGOe, with the 2-17 series falling between 22 and 32 MGOe. These magnets offer the best temperature characteristics of all rare earth magnets and can withstand temperatures up to 300 C. Sintered samarium cobalt magnets are brittle and prone to chipping and cracking and may fracture when exposed to thermal shock. Due to the high cost of the material samarium, samarium cobalt magnets are used for applications where high temperature and corrosion resistance is critical.
5 Injection Molded this magnets are a composite of resin and magnetic powders of different materials allowing parts to be made in an injection molding process. Energy products are dependent upon the magnetic powders used in fabrication. The molding process allows for the manufacture of more complex shapes. These magnets are usually lower in magnetic strength as there are limitations to the degree of loading.
6 Flexible the magnets are very similar to the injection molded magnets but are produced in flat strips and sheets. These magnets are lower in magnetic strength and very flexible depending on the materials that was used in the compound with the magnetic powders. Vinyl is often used in this type of magnet as the binder.

TOPNeodymium magnets must be carefully handled to avoid personal injury and material damage due to its extremely magnetic strength and brittle property.

Br of Neodymium magnets are much more than 11,000 Gauss. Therefore, Neodymium magnets have strong holding strength on metal surface and could be used as component for holding, separating, etc.

correlative between low weight loss & temperature coefficient with a rare earth magnet

  • parameter technique Serial No 121 2atm 100%RH 96Hours 131 3atm 100%RH 168Hours
    Coventional Technology Without T-series >150mg/cm2 >500mg/cm2
    With T-series 50-150mg/cm2 100-500mg/cm2
    With L-T series 10-50mg/cm2 50-200mg/cm2
    special Technology Without T-series 50mg/cm2 50-300mg/cm2
    With T-series 10mg/cm2 50mg/cm2
    With L-T series 3mg/cm2 5mg/cm2

    TOP

    Why Are Neodymium Magnets So Strong?

    Neodymium may the rare earth metal neodymium magnets are named for, but the magnets themselves are actually an alloy of iron, boron and neodymium. The magnet’s chemical composition is typically Nd2Fe14B, a composition that forms a tetragonal crystal structure.This structure has what is called exceptionally high uniaxial magnetocrystalline anisotropy–as high as HA~7 Tesla. In layman’s terms, this means neodymium magnets’ atoms are arranged in such a way as that the electron spin is permanently and very strongly aligned in a given direction, giving the compound the extreme magnetic force for which it’s famous.

    China NdFeB Permanent magnets Standard
    NdFeB remanence(Br) Coercivity(HcB) Intrinsic Coercivity(HcJ) BHmax T
    Grade KGs T KOe kA/m kOe kA/m mGOe kJ/m3 oC
    N35 11.7-12.1 1.17-1.21 =10.9 =868 =12 =955 33-36 263-287> 80
    N38 12.1-12.5 1.21-1.25 =11.3 = 899 =12 =955 36-39 287-310 80
    N40 12.5-12.8 1.25-1.28 =11.6 =923 =12 =955 38-41 302-326 80
    N42 12.8-13.2 1.28-1.32 =11.6 =923 =12 =955 40-43 318-342 80
    N45 13.2-13.8 1.32-1.38 =11.0 = 876 =12 =955 43-46 332-366 80
    N48 13.8-14.2 1.38-1.42 =10.5 = 835 =12 =876 46-49 366-396 80
    N50 13.8-14.5 1.38-1.45 =10.5 =835 =12 =876 47-51 374-406 80
    N52 14.4-14.8 1.44-1.48 =10.5 =836 =11 =876 49-53 390-422 80
    N35M 11.7-12.1 1.17-1.21 =10.9 =868 =14 =1114 33-36 263-287 100
    N38M 12.1-12.5 1.21-1.25 =11.3 =899 =14 =1114 36-39 287-310 100
    N40M 12.5-12.8 1.25-1.28 =11.6 =923 =14 =1114 38-41 302-326 100
    N42M 12.8-13.2 1.28-1.32 =12.1 =963 =14 =1114 40-43 318-342 100
    N45M 13.2-13.8 1.32-1.38 =12.5 =995 =14 =1114 43-46 342-366 100
    N48M 13.7-14.2 1.37-1.42 =12.8 =1018 =14 =1114 45-469 358-390 100
    N50M 14-14.5 1.4-1.45 =13.1 =1042 =11 =1114 47-51 374-406 80
    N30H 10.8-11.3 1.08-1.13 =10.2 =812 =17 =1353 28-31 223-247 120
    N33H 11.3-11.7 1.13-1.17 =10.6 =844 =17 =1353 31-33 247-263 120
    N35H 11.7-12.1 1.17-1.21 =11.0 =876 =17 =1353 33-36 263-287 120
    N38H 11.8-12.5 1.18-1.25 =11 =875 =17 =1114 47-51 374-406 80
    N40H 12.5-12.8 1.25-1.28 =11.5 =915 =17 =1353 38-41 302-326 120
    41H 12.5-13.2 1.25-1.32 =11.8 =939 =17 =1274 38-42 302-334 120
    N42H 12.8-13.2 1.28-1.32 = 11.9 = 947 = 17 =1353 40-43 318-342 120
    N44H 13-13.7 1.3-1.37 =12.1 =963 =16 =1247 41-45 326-356 120
    N46H 13-13.7 1.3-1.37 =12.1 =963 =16 =1247 41-45 326-356 120
    N48H 13.7-14.2 1.37-1.42 =12.7 =1011 =16 =1274 45-49 356-390 120
    N30SH 10.8-11.3 1.08-1.13 = 10.0 = 796 = 20 =1592 28-31 223-247 150
    N33SH 11.3-11.7 1.13-1.17 = 10.5 = 836 = 20 =1592 31-33 247-263 150
    N35SH 11.7-12.1 1.17-1.21 = 11.0 = 876 = 20 =1592 33-36 263-287 150
    N38SH 12.1-1.25 1.21-1.25 = 11.4 = 907 = 20 =1592 36-39 287-310 150
    N40SH 12.5-12.8 1.25-1.28 = 11.6 = 923 = 20 =1989 38-41 302-326 150
    N30UH 10.8-11.3 1.08-1.13 = 10.2 =812 =25 =1990 28-31 223-247 180
    N33UH 11.3-11.7 1.13-1.17 = 10.5 = 836 = 25 =1990 31-33 247-263 180
    N35UH 11.7-12.1 1.17-1.21 = 10.7 = 852 = 25 =1990 33-36 263-28 180
    N38UH 12.3-13 1.23-1.3 =11.6 =915 =25 =1990 36-40 287-316 180
    N40UH 12.6-13.2 1.26-1.32 =10.5 =839 =25 =1990 38-42 298-334 180
    N28EH 10.4-10.8 1.04-1.08 =9.5 =756 =30 =2388 26-29 207-231 200
    N30EH 10.9-11.7 1.09-1.17 =10.2 =812 =30 =2388 28-32 223-255 200
    N33EH 11.4-12.2 1.14-1.22 =10.7 =851 =30 =2388 31-35 279-2274 200
    N35EH 11.8-12.5 1.18-1.25 =11 =875 =30 =2388 31-35 279-2274 200
    N38EH 12.2-13 1.22-1.3 =11.5 =915 =30 =2387 36-40 287-318 200
    N28AH 10.4-11 1.04-1.1 =9.70 =772 =35 =2786 26-29 207-231 220
    N30AH 10.8-11.7 1.08-1.17 =10.2 =812 =35 =2786 28-32 223-255 220
    N33AH 11.4-12.2 1.14-1.22 =10.7 =851 =35 =2786 31-38 247-279 220
    N35AH 11.7-12.5 1.17-1.25 =11.0 =876 =35 =2786 33-37 263-295 220
    Total 45 STRONG SUPRT Neodymium Iron Boron (NdFeB) Magnets OF Parameters

    TOPSintered ferrite magnets, hard ferrites, hard ferrite magnets are available in isotropic magnets and anisotropic magnets. The magnetic properties of isotropic ferrite are low.

    Sin There are mainly two types of ferrite magnets, barium ferrite (BaO.6Fe2O3) and strontium ferrite (SrO.6Fe2O3). Since ., so sintered ferrite magnets are very cheap. In another hand, since the magnetic properties of sintered ferrite magnets is fairly good, so sintered ferrite magnets widely used in many different applications, such as motors and loudspeakers.

    standard from USA

  • Ball magnets
    Bar magnet
    Bar magnets
    Buy magnets
    Ceramic magnets
    Cms magnetics
    Custom magnets
    Diametrically
    Disc magnets

    Earth magnet

    Earth magnets
    Knife magnet
    Large neodymium magnets
    Magnet balls
    Magnet blocks
    Magnet building toys
    Magnet cubes
    Magnet for sale
    Magnetic
    Magnetic balls toy
    Magnetic bar
    Magnetic blocks
    Magnetic bottle opener
    Magnetic bracelet
    Magnetic bracelets
    Magnetic earrings
    Magnetic generator
    Magnetic hooks
    Magnetic jewelry
    Magnetic knife holder
    Magnetic knife strip
    Magnetic levitation
    Magnetic name badge
    Magnetic name badges
    Magnetic name tags
    Magnetic pins
    Magnetic strips
    Magnetic sweeper
    Magnetic tool holder
    Magnetic toy
    Magnetic toys
    Magnet name tags
    Magnet ring
    Magnet rings
    Magnets
    Magnets for kids
    Magnets for sale
    Magnets toys
    Magnet therapy
    Magnet toy
    Magnet toys
    Magnet wire
    N35
    N52
    N52 magnets
    Name tag magnets
    Neodium
    Neodyme magnets
    Neodymium
    Neodymium magnet
    Neodymium magnet for sale
    Neodymium magnets
    Neodymium magnets for sale
    Neodymium magnets home depot
    Neodymium magnets n52
    Neodynium
    Neodynium magnets
    Neo magnets
    Permanent magnet
    Push pins
    Rare earth magnet
    Rare earth magnets
    Ring magnet
    Strong magnets

  • sintered ferrite(Ceramic) magnets Standards
    Material Br HcB HcJ (BH) max
    mT KG KA/m KOe KA/m KOe Kj/m3 MGOe
    C1 230 2.3 148 1.86 258 3.5 8.36 1.05
    C5 380 3.8 191 2.4 199 2.5 27 3.4
    C7 340 3.4 258 3.23 318 4.00 21.9 2.75
    C8A 385 3.85 235 2.95 242 3.05 27.8 3.5
    C8B 420 4.2 232 2.913 236 2.96 32.8 4.12
    C9 380 3.8 280 3.516 320 4.01 26.4 3.32
    C10 400 4.0 288 3.617 280 3.51 30.4 3.82
    C11 430 4.3 200 2.512 204 2.56 34.4 4.32
    Total 8 grades of ceramic(ferrite) magnets

    TOPSintered Ferrite Magnet was developed since 1960s. It is manufactured from Oxide material by Powder metallurgical process. According to the difference in molding process, it can be divided into Dry Type and Wet Type ferrite magnets. According to the inner structure of the material, it can be divided into Anisotropic Ferrite Magnet and Isotropic Ferrite Magnet.

    Typical Physical Properties for Ferrite(Ceramic) magnets
    Curie Temperature (C) 450
    Maximum Operating Temperature (C) 250
    Hardness(Hv) 480-580
    Density(g/cm) 4.8 – 4.9
    Relative Recoil Permeability() 1.05 – 1.20
    Saturation Field Strength, kOe kA/m) 10 (800)
    Temperature Coefficient of Br (%/C) -0.2
    Temperature Coefficient of iHc (%/C) 0.3
    Tensile Strength (N/mm) 100
    Transverse Rupture Strength (N/mm)> 300
    Total 10 parameter for magnets

    TOPce they have nearly the same magnetic properties in all directions, so isotropic ferrite magnets can be magnetized in many different directions or in multi-poles. Anisotropic ferrite magnets have better magnetic properties compare with isotropic ferrite magnets. However this type of magnets can only be magnetized along a preferred direction.

    CHINA Standard

    CHINA hard ferrite(ceramics) magnets Standard
    GRADE 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 3.9-4.4
    Y33H 410~430 4.10~4.30> 250-270 3.14-3.39 250-275 3.14-3.45 31.5-35.0 3.9-4.4
    Y34 420~440 4.20~4.40 200-230 2.51-2.89 205-235 2.57-2.95 32.5-36.0 4.1-4.4
    Y35 430~450 4.30~4.50 215-239 2.70-3.00 217-241 2.73-3.03 33.1-38.2 4.1-4.8
    Y36 430~450 4.30~4.50 247-271 3.10-3.40 250-274 3.14-3.44 35.1-38.3 4.4-4.8
    Y38 440~460 4.40~4.60 285-305 3.58-3.83 294-310 3.69-3.89 36.6-40.6 4.6-5.1
    Y40 440~460 4.40~4.60 330-354 4.15-4.45 340-360 4.27-4.52 37.6-41.8 4.7-5.2
    Total 21 grades for Sintered MAGNETS

    TopIt is considered a fundamental magnetic material, for it is widely used in many fields owing to its good magnetic performance and the low cost of its raw material. In various applications, it can not be replaced, although many new magnetic materials came out in recent years

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