Homemade Ferrite - what updates do you seek most? Answered
First a massive thank you for the interest in my project - I certainly was expecting this great response!
Some might already know my first tutorial on how to make your own ferrite, here:
As the muber of followers grow and so the hits on the linked video I was wondering what updates you would most interested in!
I want to make some custom pot cores for small HF transformers in the 2-20kHz region.
So the question is what new recipe you would like to see...
There are several options, all would include some mould making first:
Clay as a binder
Ceramic as a binder
Using some non-hygroscopic salts to melt into the ferrit powder as a binder - all three would require to finnish the parts in a good oven
2K glue or fibreglass resin as a simple dry mix
2K glue or fibreglass resin with vacuum curing to remove all air - this might require special glue as in my experiments resin and glue start boiling long before total vacuum is reached, was thinking of casting resin istead as this would be rated for vacuum preparation
From past experiments these are the most likely candidates to result in a good product, if you have other ideas and suggestions post them here.
Being a guy that loves to keep things simple and prefering the use of scrap / easy to obtain parts I would obviously love to know where you struggled with your creation of ferrite.
I still did not find a good source for rare earth materials in fine powder form to add to the mix but don't think it is an issue as for high performance there are always commercial cores available.
Some people asked my what the best was is to make a big toroid core for Rodin coils and other unuasally big cores for transformers.
If you are one of them, leave your feedback here as well as the size is only an issue in terms of avoiding cracks during the curing.
Let's get the party started! :)