Sintered Neodymium Iron Boron (NdFeB) Magnets · PDF fileContents Characteristic magnetic...

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Transcript of Sintered Neodymium Iron Boron (NdFeB) Magnets · PDF fileContents Characteristic magnetic...

  • Sintered Neodymium Iron Boron (NdFeB) Magnets

  • ContentsCharacteristic magnetic properties at room temperature (20C)

    Remarks on table

    Physical properties at room temperature (20C)

    1

    2

    N35N38N40N42N45N48N50N52N33MN35MN38MN40M

    N42MN45MN48MN50MN30HN33HN35HN38HN40HN42HN44HN46H

    N48HN30SHN33SHN35SHN38SHN40SHN42SHN44SHN46SHN28UHN30UHN33UH

    N35UHN38UHN40UHN28EHN30EHN33EHN35EHN38EHN25AHN28AHN30AHN25BH

    3

    4

    5

    6

    7

    8

    9

    10

    11

    12

    13

    14

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    20

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    Demagnetisation curves

    Page No. Magnet grade Page No. Magnet grade Page No. Magnet grade Page No. Magnet grade

  • 1

    N35N38N40N42N45N48N50N52N33MN35MN38MN40MN42MN45MN48MN50MN30HN33HN35HN38HN40HN42HN44HN46HN48HN30SHN33SHN35SHN38SHN40SHN42SHN44SHN46SHN28UHN30UHN33UHN35UHN38UHN40UHN28EHN30EHN33EHN35EHN38EHN25AH

    N28AH

    N30AH

    N25BH

    Grade

    8080808080807070

    100100100100100100

    9090

    120120120120120120120120120150150150150150150150150180180180180180180200200200200200220

    220

    220

    230

    Max. operating

    temp.

    min11701220126013001330137014101440114011701220126013001330137014101080114011701220126013001330136013801080114011701220126013001330136010401080114011701220126010401080114011701220

    970

    1040

    1080

    950

    typ122012601300133013701410144014701170122012601300133013701410144011401170122012601300133013601380141011401170122012601300133013601380108011401170122012601300108011401170122012601020

    1080

    1140

    1000

    RemanenceBRmT

    min870870870870900900830830830870900930950980

    10101030

    810830870900930950970980

    1010810830870900930950970980770810830870900930770810830870900730

    770

    810

    710

    typ920920920920930930850850880920950980

    1000103010601080

    860880920950980

    1000102010401060

    860880920950980

    100010201040

    810860880920950980810860880920950770

    810

    860

    750

    Normal coercivityHcb

    kA/m

    min263279303318334358382398239263279303318334358382223239263279303318334350366223239263279303318334350199223239263279303199223239263279180

    203

    220

    170

    typ279303318334358382398414263279303318334358382398239263279303318334350366382239263279303318334350366223239263279303318223239263279303200

    218

    250

    190

    Mass energy productBH(max)kJ/m3

    min955955955955955955875875

    1114111411141114111411141114111413531353135313531353135313531353135315921592159215921592159215921592198919891989198919891989238723872387238723872787

    2787

    2787

    3000

    Intrinsic coercivity

    HcjkA/m

    Sintered NdFeB magnetsCharacteristic magnetic properties at room temperature (20C)

    iHc at 150C, min. 1200KA/miHc at 180C, min. 900KA/m

    iHc at 150C, min. 1200KA/miHc at 180C, min. 900KA/m

    iHc at 150C, min. 1200KA/miHc at 180C, min. 900KA/m

    iHc at 150C, min. 1300KA/miHc at 180C, min. 950KA/m

  • 2

    Remarks on facing table

    1 The max working temperature is only for reference, it is dependent on the circuit in which the magnet is operating.

    2 Customers are advised to consult us on any application involving temperatures near to 150C.

    3 When L/D = 0.7, the magnet can be operated at maximum working temperature before irreversable losses occur.

    Temp. Coeff. Of Br 0.11%/C

    Density 7.5/cm

    Vickers Hardness 600Hv

    Tensile Strength 8.0kg/mm

    Specific Heat 0.12 kcal/(kg,C)

    Young's Modulus 1.6 10N/m

    Poisson's Ratio 0.24

    Curie Temperature 310340C

    Temp. Coeff of iHc 0.60%/C

    Electrical Resistivity 144 .cm

    Flexural Strength 25kg/mm

    Coeff. Of Thermal Expansion 4106/C

    Thermal Conductivity 7.7 kcal/(m.h. C)

    Rigidity 0.64N/m

    Compressibility 9.8 10m/N

    Physical properties at room temperature (20C)

  • 3

    Demagnetisation curves

  • 4

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    Demagnetisation curves

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    Demagnetisation curves

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    Demagnetisation curves

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    Demagnetisation curves

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    Demagnetisation curves

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    Demagnetisation curves

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    Demagnetisation curves

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    Demagnetisation curves

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    Demagnetisation curves

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    Demagnetisation curves

  • 24

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    Demagnetisation curves

  • 26

  • Eclipse Magnetics LtdAtlas Way, Atlas North, Sheffield, S4 7QQ, EnglandT +44 (0)114 225 0600 F +44 (0)114 225 0610 sales@eclipse-magnetics.co.uk www.eclipse-magnetics.co.uk