Materials

Powder Core inductor materials are made from discrete particles of ferromagnetic powder. Prior to being formed into a core, the particles are covered in a thin layer of electrically insulated material to ensure electrical isolation of each particle. The particles are then compacted under high pressure to form the core geometry. The electrical insulation between particles enables the materials to be used at high frequency.The insulation also forms a distributed air gap throughout the core material, giving the material the ability to maintain inductance linearity with a DC biasing field, a desired attribute for high performance inductors.

Micrometals formulates and processes their own powder materials to assure superior performance and consistency. Micrometals also has extensive experience at custom formulations to meet the requirements of demanding applications.  This includes propretary formulations of Sendust, HighFlux, FluxSan, Molypermalloy, RF Powders, Power Conversion alloys, and our exclusive Optilloy Alloys specifically formulated to provide optimal core loss, optimal DC Bias or economical alternatives to Sendust.


Micrometals Proprietary Material Formulations

SENDUST
  • Iron, Silicon, Aluminum alloy powder material
  • Permeabilities: 14µ, 26µ, 40µ, 60µ, 75µ, 90µ, 
    125µ, 147µ and 160µ
  • Low Magnetostriction for audibly quiet applications
  • Cost effective low loss material
 
  • Operating frequencies to MHz
  • No thermal aging
  • Wide selection of Sendust toroids, E-cores and blocks
PERFORMANCE OPTIMIZED ALLOY
  • Hybrid alloy powder material
  • Permeabilities: 14µ, 26µ, 40µ, 60µ,
    75µ, 90µ and 125µ
 
  • Moderate losses ≤200kHz
  • No thermal aging
  • Toroids up to 196mm
OTHER ALLOYS
  • Nickel, Iron Molybdenum alloy powder material
  • Permeabilities: 14µ, 26µ, 60µ, 125µ, 147µ, 160µ, 173µ and 205µ
  • Operating frequencies ≤200kHz
  • Very low loss powder materials
  • No thermal aging
  • Wide selection of toroids up to 154mm
RADIO FREQUENCY
IRON POWDER
  • Carbonyl Iron formulations.
  • Ideal for High Q applications from 0.1 to 700 MHz
    including radio communications, video communication and broadband transformers
  • Permeabilities from 1 to 35
POWER CONVERSION
IRON POWDER
  • Iron and Carbonyl blend formulations
  • Ideal for Power Conversion Chokes, PFC Inductors, CM flyback Inductors and EMI/RFI
  • Permeabilities from 10 to 100

Products by Applications

Micrometals Iron and Alloy powder cores can be used across
many different applications depending on the desired performance
specifications, allowable core losses and desired frequency responses.
To assist in the selection of the ideal core material we have created
these Application pages to compare our various proprietary materials