Buyer's Guide: Grades of Magnets

Beer, vodka and magnets? Sounds like the recipe for disaster but that's what I'll use to explain grades of magnets!

It's important to know about grades when shopping for neodymium magnets. In this video I tell you about the basics of it and compare the powers of ferrite- and neodymium magnets. Feel free to ask questions if you need help or in doubt.

Music credit for the outro:
'Junkyard Tribe' by Kevin MacLeod
ISRC: USUAN1200021

English captions available - just press CC under the video. Danish captions coming soon...

[sitarnut]

Best Channel on Youtube for making things clear about science. Wish you a long and fruitful career as an educator of folks who've been curious about science since junior high school. Love the common sense and humor put into your demonstrations. Wish that it was mandatory for all high school students to watch- we had "Mr. Wizard" back then- you're the wizard now my friend!

[brainiac]

Thank you very much!
I've always loved science and have never understood why so relative few people are interested in it.
I try to share my fascination of it and hope people can see that science can appeal to most people.
Luckily it looks like people are beginning to realize that there's more to YouTube than just music videos and people failing ;)

[tomsmiek]

Hell yes. THANK YOU. I was a bit curious about magnets but could not have wished for a more thorough introductionary video. You rock.

[brainiac]

Thanks for the support! More videos to come so stay tuned ;)

[brainiac]

There's an interesting project about 'transformational nanostructured permanent magnets' that expect up to 80 MGOe (the equivalent of a N80 neodymium magnet!). I really hope they succeed!
As far as I know the strongest neodymium magnet ever created in the lab was around N59 - the theoretical limit for Nd2Fe14B is N63-64 but that will probably never be achieved (you cannot get 100% pure neodymium or iron for that matter as ingredients for the magnets).
Thanks for watching!

[brainiac]

Thanks :)
It is neodymium magnets they use/used in MRI-scanners. They just use a lot of single magnets in them (up to 1 to 3 tons of them for each scanner according to Avalon Rare Metals!) stacked in a special configuration. Most likely some sort of halbach array - I don't really know.

[Pphnx]

i love these vidos, with the apocalypse at hand they are very comforting. thank you!

[skyblair]

Wow!!! Thank you, thank you, thank you!!!I have been looking for something to explain magnets, because I'd like to go magnet fishing as a hobby.

[brainiac]

Thanks for the support from all of you! I have the best subscribers :)

[kat]

Wow very interesting, and you made it easily understandable for an idiot like me.. Your poor beer!.. Now off to watch more of your cool videos.. Keep them coming please.

[tosbossthinkorswimmplatfor]

Good vid .. simple ... a true Kraut comparison - magnetic strength to alcohol - LOL it was great ..and a good way to understand it simply .. thank you ...

[tommygombar]

Valuable footage that enlightens the audience.

[whispergb]

Great info with tongue in cheek humor. Thanks!

[Waelsa]

Very nice and informative. I couldn't find all this information in one place and easily explained as you did. Thank you for taking the time to teach and inform others.

[stFaris]

1-3 tons of neodymium magnets, no wonder they switched to using super conductive magnets. Thank you for the reply, I really appreciate it :)

[brainiac]

The magnetic field still penetrates the pyrolytic carbon even though it is highly diamagnetic. So you would have a quite normal magnet except for a fragile coating that would constantly try to escape the magnet :)

[riotpoliec]

Wow, great video. Glad to see you are still making videos, I always enjoy watching them even if they don't have anything to do pertaining to my life!

[brainiac]

That's not a bad idea. I may make such a video. In my video 'How is a 6" neodymium magnet delivered?' you can see how my big magnet is stored in the original packaging.
There are also some short clips in my video 'Testing my magnet collection'.
Feel free to ask if there is something in particular you would like to know.

[brainiac]

If I had access to supercooling I would experiment with superconductors :)
Neodymium magnets improve their strength down to around -138*C but lower than that and they start loosing some power. Replacing the neodymium completely with praseodymium (Pr2Fe14B) makes some strong magnets that increase in strength the more you cool them - even at very, very low temperatures. I wish I had access to a lab...

[brainiac]

It's actually from magnetportal'de but both are selling the exact same magnet from the same surplus stock from a German generator company that changed the way they make generators (Siemens??).