MAGSILICA® / Magnetic Induction

Inductively heatable particles – MAGSILICA®

Inductively heatable particle in an oscillating magnetic field. <br> <br> <br> <br>
© Fraunhofer ISC
Inductively heatable particle in an oscillating magnetic field.



Heating power of various particle systems in a <br> 1 MHz alternating magnetic field.<br><br>
© Fraunhofer ISC
Heating power of various particle systems in a
1 MHz alternating magnetic field.

Precise, fast and efficient heating is achieved by magnetic particles (MAGSILICA®) exposed in an oscillating magnetic field. This allows simple, cost-effective and automizable industrial processes. For example, very fast curing of resins and silicones or local heating of catalysts or adhesives can be realized. In addition, the bonding/debonding of joined parts is also very attractive for recycling-friendly products.
 

System

  • Magnetic additives MAGSILICA® in combination with induction processes allow extremely fast, locally limited heating.
  • Inexpensive silica particles containing tailor-made magnetic nanoparticles are, for example, introduced directly into the material to be heated as additives.
  • A controllable induction field is used to apply the energy required for the desired heating directly into the additive containing material in a fast and precisely localizable manner. In this way, for example, thermally activated adhesives can be cured or dissolved quickly.
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  • Advantages of the process are:
  • Efficient energy coupling
  • Fast heating rates of up to 1500 Kelvin per second
  • Exact localization and limitation of heating
  • Uniform heating of complex structures such as extruded profiles, pipes, seals or fibres
  • Precise temperature control through specific adjustment of the additives and/or regulation of the induction field
  • Simple induction hardware that can be retrofitted into existing production systems (also robot-supported)
Scanning electron microscope image of the octahedral morphology of inductively heatable iron oxide particles.
© Fraunhofer ISC
Scanning electron microscope image of the octahedral morphology of inductively heatable iron oxide particles.

Challenge in adhesive applications

  • High adhesive forces (especially on smooth surfaces)
  • Intelligent, fast heating with controlled maximum temperature
  • Reduction of production time by minimizing the heating distances and heating time
  • Bonding of sensitive or hardly compatible materials 
  • Adhesive connections that can be removed at the push of a button (bonding/debonding for recyclable products)

     

Video on adhesive connections that can be released at the push of a button:

 

Offer

  • Custom synthesis of inductively heatable particles for your application
  • Consulting and process development in the field of induction heating
  • Scaling up of synthesis and out-licensing (or similar)