Material Business

Material Business

Business establishment (Gumii)
사업장(구미)
  • lot area : total 3,039㎡(920square meter)
  • building area : 1,900㎡
    1) Product Factory : 900㎡
    * 2019. 7 ~ 8 scheduled to be renovated
    2) Meterial & Product Warehouse : 600㎡
    3) Office & R&D Center : 400㎡
  • Main Product : Amorphous Metal Alloy
    Powder Product Capa : 80 Ton/M
  • ADDRESS : 64-23, 1gongdan-ro 6-gil, Gumi-si, Gyeongsangbuk-do, Republic of Korea


Business field (Gumii)

Technology
Effect

Magnetic Core
Amorphous & Nanocrystal Core
Sendust Core
FeSi Core
SMD Core
EMI/EMC Solution
EMI/EMC Sheet
Radiation Sheet
Plant Engineering
Facilities Design & Production
Process Design
Fine Metal Powder
Amorphous (Nanocrystal) Metal Alloy
Superfine Metal (≤ 10㎛)
Stainless
Al & Cu Alloy
Special Alloy(SKD)
Zr-based Alloy

Superior Technology & Ripple Effect
  • Main Sourcing Tech.
    Manufacturing of Metal Powder
    by Complex Atomizing
    (Material, Process Patent : 3 Cases)
    • Amorphous Alloy
    • Fe-based Nanocrystal Alloy
    • Metal Alloy for 3D Printing
    • Related Facilities Self Design
  • Superiority of Tech.
    Compared to Other Processes
    • Mass Product.(Productivity)
    • Simple Process(Economy)
    • Various Shapes(Dimension)
    • Excellent Physical &
      Mechanical Property
  • Main Use
    Core Materials for Machinery
    & Electronic Parts
    • Fe-based Amorphous
      (Nanocrystal) Alloys
    • Al-based Alloy
    • Ti-based Alloy
    • Mg-based alloy
  • Ripple Effect
    Key Industry

    • POSCO : Steel Sheet
    • Zenix : Metal Powder & Part
  • Manufact. of Parts by Warm Press.
    (Process Patent: 2 Cases)
    • High Perm. Amorphous Core
    • High Performance Sendust Core
    • Metal Case Manufacturing
    • Related Facilities Self Design
  • Special Powder Molding is possible;
    • Thin Sheet( ≤ 1mm) Manufact.
    • Complex Shape Manufact.
    • Tightness of Microstructure
    • Excellent Physical Property
  • Core parts for Machine,
    Electronics & Communication
    (Patent : 8 Cases)
    • Electric Conversion Device
      (Magnetic Core)
    • Automotive Parts
    • EMI Sheet
    • Mold etc.
  • Coverage, Usage Infinity
    • Lightweight Equipment
    • Light & Short Digestion
    • High Frequency
    • New Business
    • Job Creation

Leading Company for Material & Electromagnetic Part!!!


Fine Metal Powder (From the Beginning of 2020)

Type of Metal Powder (Main : Amorphous)

  • Amorphous(FeSiB계)
    이미지
  • Brass, Bronze
    이미지
  • Al Alloy(6061)
    이미지
  • STS316L
    이미지
  • FeSi Alloy
    이미지

Main Technology

Item Content Related Patent
  • Manufacture of Fine Metal Powder
    • Fe-based Alloy
    • Ni-based Alloy
    • Cu-based Alloy
    • Stainless
    • Special Alloy
  • Design & Making of Complex
    Water-Gas Atomization Device
  • Capacity : 500 ~ 1,000 kg / ch
  • Water Press. : ≥ 50 MPa, Gas Press. : ≥ 0.2 Mpa
  • Various Complex Nozzle Design
  • Pat 0372226 : Making Process of Amorphous Metallic Powder by High Pressure Water Atomization
  • Pat 1607483 : Fe-based Nano-crystallization Alloy, and Making Process
  • Pat 1776111 : Zr or Zr-based Alloy Powders for Production Method and thereof Zr or Zr-based Alloy Powders
  • Amorphous (Nanocrystal) Alloy Powder Manuf. Tech.
  • Superfine Metal Powder Manuf. Technology
  • Powder Average Particle Dia. 1 ∼ 30㎛
  • Powder Shape : Spherical, Oval, Irregular
  • Low Impurities : O2 ≤ 900ppm , N2 ≤ 300ppm
  • Own High Performance Amorphous Alloy System
  • Target Alloy : FeSiB-based Alloy
  • Bs ≥ 1.5T
High Performance Magnetic Device (From the 2nd Half of 2020)

Main Process

이미지

* Process : Spray Drying → Warm Pressing → Annealing → Grading → Epoxy Coating

Main Technology

Item Content Related Patent
  • Manufacture of High Performance Part
    • Amorphous (Nanocrystal)
      Magnetic Device
    • Sendust Magnetic Device
  • Spray Dryer Design (Powder Coating)
  • Continuous Forming Technology of Amorphous Alloy Powder by Warm Pressing
  • Heat Treatment Technology of Magnetic Device
  • Avg. Particle Size of Amorphous
    Powder : ≤ 50㎛
  • Binder Coating & Granuling
  • Magnetic Properties
    • Permeability : Max 500 (100kHz)
    • Low Core Loss : ≤ 150 mW / cc
      (50kHz, 1000G)
  • Pat 1607483 : Fe-based Nano-crystallization Alloy, and Making Process
  • Pat 1499297 : High Permeability Amorphous Powder Core and Making Process Using by Warm Temperature Pressing

Magnetic Property

  • Permeability vs Frequency
    이미지
    • Permeability : 160, 200, 250, 400 (Maximum Permeability of Existing Products: 200)
    • Frequency Characteristics : Much Better than Existing Finest MPP (10 Times Higher Frequency Band than Existing Products)
  • Core Loss
    이미지
    • Energy Loss Compared to MPP & HF Products is ½ Level (Possible the High Current Application due to Low Loss)

Forcasting Product

Item Effective Permeability (at 100kHz) Core Loss (mW/cc, at 50kHz & 0.1T)
Amorphous 125, 200, 300, 400 ≤ 130
Sendust 26, 60, 90, 125 ≤ 200
EMI Sheet (Present Producing Product)

Type of EMI Sheet (Main : Amorphous Sheet)

  • EMI Sheet
    이미지
  • Typical Structure
    이미지

Main Technology

Item Content Related Patent
Complex Sheet
  • Sendust
  • FeSiCr + Al
  • Amorphous + Al
Flaked Metal Powder
(Aspect Ratio : ≥ 5)
  • → Insulation & Binder Coating
  • → Hot Pressing
  • → Complex Sheet
(Flake Sheet+ Conductive Foil)
  • Pat 1803828 : Sheet for Shielding Electromagnetic Wave with Flexibility and Preparation Methods Thereof
  • Pat 2018-0042552 : Sheet of Complex Shielding Electromagnetic Wave with High Performance and Manufacturing Methods Thereof
  • Pat 2019-0036574 : Method for Manufacturing Magnetic Sheet Having Excellent Shielding and Absorption of Electromagnetic Waves and Heat Radiation Characteristics
  • Pat 2019-0036575 : Sheet of Complex Electromagnetic Shielding Wave Having Excellent Shielding and Absorption of Electromagnetic Waves

Characteristic of Complex EMI Sheet

Item Unit Data
Complex Sendust Complex Amorphous
Thickness mm 0.3 0.3
Structure - 2 Layer 2 Layer
Density g/cm3 3.7 4.1
Effective Frequency GHz 0.01 ~ 10 0.01 ~ 10
Permeabilty (at 1 MHz) - 100, 200 90
Shielding Rate (at 5GHz) dB 80 ~ 90 90 ~ 95
Absorbing Rate (at 5GHz) dB 2 ~ 5 15 ~ 20
Operating Temperature -30 ~ 85 -30 ~ 85
Thermal Conductivity W/m·K ≥ 0.5 ≥ 0.2
Bending degree ≥ 120 ≥ 120

Typical Properties for Complex Amorphous Sheet

  • 이미지
  • 이미지
  • 이미지