High Grade Permanent Magnets

Neodium is available in quantities and relatively cheap. Are you building an anti-gravity device? You'd better look for a strong cooling method, not strong magnets.

Thank you, Yuval.

My application is a very down to earth one (NO antigravity, free energy, etc.) and permanent magnets cannot be substituted with electromagnets, as you suggested. So I'm still looking for higher grade magnetic materials. Sintered Neodynium-Iron-Boron N50 have 50 MGOe maximum energy (about 400KJ/m3). My question was: do you know any better material in terms of maximum energy?

Regards.

Samarium-Cobalt?

Just in case you were to be interested in building a Levitron, the secret is building a bowl shaped (concave) repulsive field, to allow for a "stable-balance" of the subject

http://www.unitednuclear.com/magnets.htm

for: Nd-Fe-B type, all sizes and shapes, with prices

The reason for which I put my question in New Technologies & Research and NOT in Electrical Engineering section was not to abuse anyone's time and energy in making assumptions on my application and design/calculation of a magnetic circuit.

Any shared knowledge of a magnetic material (commercially available or under research) having more than 50MGOe will be very much appreciated.

Thank you all.

...not to abuse anyone's time and energy...

I'm sure everyone will appreciate that, but, see, commercially available, nothing higher than 45 MG is out there.

You'll need some Skunkworks here.

So, cooling may increase conductivity and flux, and thus apparent power.

Besides, no-one can really help themselves: the moment you mention magnets, we start to sweat and salivate, then wet-dreams of Buck Rogers type levitation and teletransporting fills our inflating heads, you know, us being ourselves ...

Nice thoughts, Yuval.

Actually I'm working on a project together with a friend from Israel.

So far, we found N50 magnets, but nothing beyond that. We're still looking...

I just scrapped a perendev magnetic motor project just for this reason. I used Neodium iron boron magnets. The rotation causes a combing afect that over time wipes even the NEO Fe Bor magnets completely out. Been there, done that.

Good for you. Nothing beats the good old fashioned hands-on approach for problem solving.

I think that the intention is less to build an anti garv device and more to make a small generator using mechanical mouvements, vibrations aso for curent generation.

A so called harvester. For such devices, most of them portable, it is important to have strong fields so that the coil will not be too big and get even at small speeds an output.

The problem is the design of the magnetic loop in order to avoid not necesaary gaps.

Try looking up rare earth magnets. The sort of magnet available from a standard supplier is unlikely to be of much use to you if the N50 type is the best you can find. You may have to go to a specialist supplier. They will be expensive unless you want a few thousand.

According to this company, "We can produce N52products."

http://www.nbvsmagnetic.com/

Thank you, Bill.

Your good intention counts.

Regards

Mike