I want to contain, insulate, or shield a magetic field. Is there any kind of material that will do that?
I am building a large electromagnet with some metal rods and wire, but I only want to use the north end of the magnet for these particular experiments. Shielding the opposite field from reaching too far isn't completely nessesarry - it would just be far more convienient that way. I dont want to have to worry about the south end backlash and what affects it wold have on anything remotely nearby. (Computers, videotapes, laptops, certain cell phones, etc)
2007-12-09 05:32:05 · 4 answers · asked by dustandrags 2 in Science & Mathematics ➔ Engineering
the core, I didn't think of that. what effects will that have in the north end of the magnet? I'll give that some thought too.
I was thinking more of shilding it as it was "radiating" (only word I can think of) off the electromagnet and somehow seal it inside a wood box or something - what would I line that box with? if anything? what material do magnetic waves have a hard time getting through? like radiation with lead, is there anything?
2007-12-09 05:42:55 · update #1
ok, so if I use a metal that is attracted to the magnet, then it's good to use as a hinderance for the magnetic field? Or do I want a material that is NOT attracted to magnets to use as a shield
2007-12-09 22:41:03 · update #2
You could use a steel or iron box to cover the magnet.
That is the principle that they use with inductive-sensors (which have a magnetic field) to keep them from detecting their target except when the steel barrier is removed from between the sensor and its target.
2007-12-09 07:45:15 · answer #1 · answered by Rich Z 7 · 0⤊ 0⤋
The best ferromagnetic material you could probably find off the shelf would be Iron or steel (not stainless steel, as that could be hit or miss depending on the nickle content of the steel). The best test is if you can attract the metal with a magnet then it would be good for "insulating" your magnet from the outside. This type of material is also good for making magnetic cores.
I don't know if this will help with your application... but try making your core into the shape of a "C" ...that will make your magnetic field stronger, and keep the magnetic flux rather weak anywhere that isnt in between the two ends of your "C".
But overall I would assume you wouldn't have to worry about that unless you have your cell phone or computer sitting right next to the thing.
2007-12-09 15:57:57 · answer #2 · answered by Bob 2 · 0⤊ 0⤋
Laminated soft iron core
2007-12-09 13:38:43 · answer #3 · answered by JavaScript_Junkie 6 · 0⤊ 0⤋
isolate the south pole w/ electron dragging
2007-12-09 13:51:42 · answer #4 · answered by D2Hammers 2 · 0⤊ 0⤋