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MAGNET

제품소개

(주)에스제이정밀의 마그넷 사업부를 안내합니다.

제품소개  주요고객사  보유설비  기술자료 

컨텐츠 영역

페라이트 자석

Process Flow Chart for Ferrite Magnet

  • Raw Material

    inspection made to Br, Hcb, Hcj

    • Small lot inspection

  • Mill Material

    Reduce size from 0.8~0.9㎛

    • Powder size checking
    • Water percentage
    • Magnetic property

  • Press

    Polarisation is made

    • Flux
    • Pressure
    • Dimensions
    • Appearance

  • Sintering

    1200℃ for 32hours electric sintering ovens

    • Temperature (13 area control)
    • Magnetic testing
    • Dimension check
    • Appearance 100% sorting

  • Grinding

    Radius, Length, Width, Chamfer

    • Radius check before
    • Other Dimension
    • Appearance

  • Cleaning & Inspection

    Ultrasonic & Visual

    • Appearance
    • Dimensions
    • Go gauge (if necessary)

  • Final Inspection & Package

    • Final audit (Magnetic property, Dimensions, Appearance, Package)

  • Shipping & Stock

Typical Magnetic Performance for Ferrite Magnet

The elements are ferrite oxide, barium, strontium. It is widely used in applications such as motors, loudspeakers and craft etc width low cost.

    • Curie Temperature
    • 450℃
    • Curie Temperature
    • 450℃
    • Temperature
    • -40 ~ 80 ℃
    • Resistively
    • 104 ~ 108 Ω.㎝
    • Density
    • 4.8 ~ 5.1 g/㎤
    • Relative Recoil Permeability
    • 1.05 ~ 1.3 μrec
    • Wire Expansion Coefficient
    • 9 ~ 15 × 10-6 ℃
    • Temperature Coefficient of Remanence
    • 0.18 ~ -0.20%/℃

Common Tolerance for Ferrite Magnet

Typical Magnetic Characteristics for Cast ALNICO Magnet

  • Br
  • Hcb
  • Hcj
  • BHmax
Grade Br Hcb Hcj BHmax
kG mT kOe KA/m kOe KA/m MGOe KJ/m3
Y8T 2.0~2.35 200∼235 1.57~2.01 125∼160 2.64~3.52 210∼280 0.82~1.19 6.5∼9.5
Y22H 3.1~3.6 310∼360 2.76~3.14 220∼250 3.52~4.02 280∼320 2.51~3.02 20.0∼24.0
Y25 3.6~4.0 360∼400 1.70~2.14 135∼170 1.76~2.51 140∼200 2.83~3.52 22.5∼28.0
Y26H-1 3.6~3.9 360∼390 2.51~3.14 200∼250 2.83~3.20 225∼255 2.89~3.52 23.0∼28.0
Y26H-2 3.6~3.8 360∼380 3.30~3.62 263∼288 3.99~4.40 318∼350 3.02~3.52 24.0∼28.0
Y27H 3.6~3.8 350∼380 2.83~3.01 225∼240 2.95~3.27 235∼260 3.14~3.64 25.0∼29.0
Y28 3.7~4.0 370∼400 2.20~2.64 175∼210 2.26~2.76 180∼220 3.27~3.77 26.0∼30.0
Y28H-1 3.8~4.0 380∼400 3.01~3.27 240∼260 3.14~3.52 250∼280 3.39~3.77 27.0∼30.0
Y28H-2 3.6~3.8 360∼380 3.40~3.71 271∼295 4.80~5.09 382∼405 3.27~3.77 26.0∼30.0
Y30H-1 3.8~4.0 380∼400 2.89~3.45 230∼275 2.95~3.64 235∼290 3.39~4.02 27.0∼32.0
Y30H-2 3.95~4.15 395∼415 3.45~3.77 275∼300 3.89~4.21 310∼335 3.39~4.08 27.0∼32.5
Y32 4.0~4.2 400∼420 2.01~2.39 160∼190 2.07~2.45 165∼195 3.77~4.21 30.0∼33.5
Y32H-1 4.0~4.2 400∼420 2.39~2.89 190∼230 2.89~3.14 230∼250 3.96~4.40 31.5∼35.0
Y32H-2 4.0~4.4 400∼440 2.81~3.01 224∼240 2.89~3.14 230∼250 3.90~4.27 31.0∼34.0
Y33 4.1~4.3 410∼430 2.76~3.14 220∼250 2.83~3.20 225∼255 3.96~4.40 31.5∼35.0
Y33H 4.1~4.3 410∼430 3.14~3.39 250∼270 3.14~3.45 250∼275 3.96~4.40 31.5∼35.0