RF Susceptor Heating (KHz range) Graphite Foil vs Iron Foil (or thin film)

In summary, the best choice for a low temperature RF heating susceptor is Graphite (expanded graphite foil) due to its excellent thermal conductance and even heating patterns over large areas. However, if dealing with smaller areas, susceptance properties of both Graphite and other materials, such as foils with <2mm thickness, should be compared in similar geometries, frequencies, and field strengths. The system wattage should also be considered, not exceeding 100W. Further information or rewording of the post may lead to new conclusions.
  • #1
Watson
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Which do you believe is the best choice for a low temperature RF heating susceptor, i.e. - greatest rise in temperature vs. field strength. I am aware that Graphite (expanded graphite foil) has excellent thermal conductance in plane and therefore makes for very even heating patterns over large areas, however I am dealing with areas no larger than 10 sq/in.

I have not found much information comparing the susceptance properties of the two in similar geometries, frequencies and field strengths. Foils generally <2mm thickness. The system wattage does not exceed 100W.
 
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  • #2
Thanks for the post! Sorry you aren't generating responses at the moment. Do you have any further information, come to any new conclusions or is it possible to reword the post?
 

1. What is RF Susceptor Heating?

RF Susceptor Heating is a method of heating materials using radio frequency (RF) waves. It involves placing a material, such as graphite foil or iron foil, in a high frequency electromagnetic field, causing it to rapidly heat up.

2. What is the difference between using Graphite Foil and Iron Foil for RF Susceptor Heating?

Graphite foil and iron foil have different electrical properties, which affects how they interact with RF waves. Graphite foil has a higher electrical resistance and is more efficient at converting RF energy into heat, making it a better choice for RF Susceptor Heating. Iron foil, on the other hand, has a lower electrical resistance and may not heat up as quickly or evenly.

3. Why is the KHz range important for RF Susceptor Heating?

The KHz range refers to the frequency of the RF waves used for heating. The KHz range is important because it determines the depth of penetration of the RF waves into the material. Higher frequencies, such as in the MHz or GHz range, have a shallower penetration depth and may not be as effective for heating certain materials.

4. Can RF Susceptor Heating be used for all types of materials?

RF Susceptor Heating is most effective for materials that have a high electrical resistance and are transparent to RF waves, such as graphite or some ceramics. Metals, on the other hand, have a low electrical resistance and may not heat up as efficiently using this method.

5. Is RF Susceptor Heating safe?

RF Susceptor Heating is generally considered safe, as long as proper precautions and safety measures are taken. The high frequency RF waves used for heating can potentially cause burns or damage to electronic devices, so it is important to follow safety guidelines and use appropriate protective gear when working with RF heating equipment.

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