Use of graphite as a microwave energy absorber for heat transfer

combustioneer · Dec 15, 2010

I'm investigating building a melting cupola that is radiated by 2450MHz microwave to aproximately 2600F. I plan on using graphite for the cupola and I'm wondering what kind of absorption to reflection ratio I should expect to see and how will the graphite hold up to delivering energy to it in this manner. The radiation will be striking the surface at varying angles because the cupola tube is round and placed on the cental axis of a triangular chamber with the microvave radiation reflecting off of the triangular walls.

biff44 · Dec 15, 2010

It is a pretty complicated problem. There is the antenna/horn that radiates the specimen. There is the chamber surrounds the whole thing and prevents microwave power from leaking out. There is the material the crucible is made of--you want its resistivity to be just right. Too conductive and it will reflect instead of heat up with microwaves. You might want to rotate the crucible, or do something to stir up the microwave fields, so that there is more even heating.

In short, you need some detailed analysis of the problem. Suggest you hire a consultant.

http://www.MaguffinMicrowave.com

Maguffin Microwave wireless design consulting

Tek-Tips is the largest IT community on the Internet today!

Members share and learn making Tek-Tips Forums the best source of peer-reviewed technical information on the Internet!

Use of graphite as a microwave energy absorber for heat transfer

combustioneer

Mechanical

biff44

Electrical

Similar threads

Part and Inventory Search

Sponsor