I have a large plate of ferrite from a loop antenna dating from 1993. It was embedded in a foam that cannot be dissolved, but I removed most of the potting physically and then used an "all" paints remover to soften it. Then, I scraped off more of the potting foam. With enough effort and solvents, I am sure I can get it clean. I am looking for an easier way and would like to reuse the ferrite in the same style antenna at 500 kHz.
Far easier would be to cook it at 500°F (about 260°C) to depolymerize the potting. Will its properties as an antenna be changed by such heating? What if it were put through the cleaning cycle for the oven (I guess about 425°C)? I found a link that said ferrite magnets could be used to 300°C, but it didn't say what happened at higher temperatures and whether the changes were permanent.
John
Far easier would be to cook it at 500°F (about 260°C) to depolymerize the potting. Will its properties as an antenna be changed by such heating? What if it were put through the cleaning cycle for the oven (I guess about 425°C)? I found a link that said ferrite magnets could be used to 300°C, but it didn't say what happened at higher temperatures and whether the changes were permanent.
John