i want to customize a few soft ferrites into a few shapes and probably even join them together.i've decided there are 2 plausible ways to do this.1) arc weld it (ok, probably spot welding)or2) encase it in refractory clay but leave the spots to be joint, then put powdered ferrite on itthen fire them until the powdered ferrite melts and joints (reforms them together)then i break it open and i have a single piece.-with this option, i need to know the glass transition state of ferrites (i believe what i have is the FeO,Mn,Zn one) and if it will survive it.
if these questions are easy, why do you need the answers?
Ferrite magnets are ceramic materialsthey're typically made by press-and-sinter operations The magnetic powder is mixed with a certain amount of a binderThe powder is blown into a tool steel mold, and compacted using a hydraulic die with hundreds of TONS of forceThen they're sintered in an oven, and while still red hot, placed inside a powerful electromagnet and allowed to coolCooling in the presence of a strong magnetic field is what causes them to be permanently magnetizedWelding wont work because 1) they don't conduct electricity2) They're too brittle to withstand the localized thermal shock even if the former weren't true3) Heating a permanent magnet will cause it to rapidly lose all it's magnetizationYou can test this by putting a magnet on the hot plate on your stoveThere are companies out there that specialize in custom shaped magnets, but this would probably cost you several hundred dollars at least.
