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The first room-temperature ambient-pressure superconductor?

arxiv.org

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Re: The first room-temperature ambient-pressure superconductor?

#311

Post by fluidcruft »

scythe wrote: post #296
inasio wrote: post #239

Earlier quoted context omitted.

One obvious application: your family doctor will have an MRI machine in her office, same for all physio clinics

MRI will get much cheaper, but you still need a good upper critical field and a proper access control (Zone 2/3/4) protocol. So probably not in very small buildings.

From what I can tell this material can't provide higher than 0.3T. We've had permanent magnet MRI at 0.3T but the drawbacks vs superconducting magnets are weight and lack of active shielding.

Re: The first room-temperature ambient-pressure superconductor?

#312

Post by carabiner »

inasio wrote: post #239
coolspot wrote: post #121

Earlier quoted context omitted.

> Superconductor Pb10-xCux(PO4)6O showing levitation at room temperature and atmospheric pressure Is it late April Fools joke? It can’t be true. Edit: I am not surprised it levitates. I am astonished by how much it will reshape our world if it is real room-temp and ambient-pressure superconductor. Also is easy to produce. Just too good to be true.

One obvious application: your family doctor will have an MRI machine in her office, same for all physio clinics

What are the failure modes for a superconductor MRI? Could it cause a resonance cascade?

Re: The first room-temperature ambient-pressure superconductor?

#313

Post by ahlCVA »

eig wrote: post #179

A sister paper [0] has a photo of the material exhibiting the Meisner effect and levitating over a magnet, and claims to have a video too. Either they blatantly photoshopped the photo or they actually made a room temperature super conductor. I can’t see how the could have made a subtle mistake that resulted in magnetic levitation at room temp without making a superconductor. [0] - https://arxiv.org/abs/2307.12037

This seems to be the corresponding video (linked in the associated media tab on arXiv): https://sciencecast.org/casts/suc384jly50n

Re: The first room-temperature ambient-pressure superconductor?

#314

Post by JumpCrisscross »

Tuna-Fish wrote: post #176
arrowsmith wrote: post #98

Earlier quoted context omitted.

Can someone ELI5 to those of us who aren't even sure what a superconductor is?

When you cool some materials down until they are very cold, something weird happens: Their electrical resistance vanishes, and they start rejecting all magnetic fields. It's important to note that this is not a continuous process where things slowly change until it reaches zero, it is a step change after which everything related to electricity works very differently. This doesn't mean there is no resistance in the wi…

> Their electrical resistance vanishes

To put this in further context, RTP superconductors mean compact, low-power MRIs and a massive shrinking, simplification and superpowering of magnetic-confinement fusion and ion propulsion designs. It blows apart chip designers' thermal constraints and opens up entire classes of energy-storage chemistries.

If this is real, it will be the defining discovery of our lifetimes.

Re: The first room-temperature ambient-pressure superconductor?

#315

Post by m463 »

marcosdumay wrote: post #245
alexb_ wrote: post #231

Earlier quoted context omitted.

Just give it to me straight - when will the levitation give us hoverboards?

As long as you only want them to hover over a magnet...

I believe I saw a video of a hoverboard that worked over a carefully constructed magnetic skatepark...

https://www.youtube.com/watch?v=7KtzyZKSuls

Re: The first room-temperature ambient-pressure superconductor?

#316

Post by solarmist »

carabiner wrote: post #278
solarmist wrote: post #263

Earlier quoted context omitted.

The effect is weak, but seeing that it behaves the same by flipping the magnet means that it can't be a standard magnet like we're used to seeing. (If I understood some of the other comments correctly). Other comments. https://news.ycombinator.com/item?id=36867758

If this enables monopole magnets?

That's one tell. There are several tells that, in combination, mark it as a super conductor.

But I'm just parroting back what the physicists in the thread have shared, so I might have some details wrong.

Re: The first room-temperature ambient-pressure superconductor?

#317

Post by carabiner »

danbruc wrote: post #31

After skimming the paper, it reads like a legitimate paper even though I have zero expertise in the area. That it is in Word instead of LaTeX makes it feel a bit less legitimate to me and they could of course always have some error in there setup. The most notable thing to me was that this was done in a thin film where structural defects are supposedly responsible for strain in the material which in turn enables the…

> After skimming the paper, it reads like a legitimate paper even though I have zero expertise in the area.

Ummm am I the only one who finds this line hilarious?

Re: The first room-temperature ambient-pressure superconductor?

#318

Post by jacquesm »

marcosdumay wrote: post #301
jacquesm wrote: post #214

Earlier quoted context omitted.

And the voltage will be the same on both ends when it has current flowing through it .

The only thing that holds a voltage without current flowing through it is an insulator.

This isn't even wrong. A voltage can be present without a current flowing. Touch any live wire to get an instant demonstration that there indeed was a voltage present even if no current was flowing. Not because the wire is an insulator but because it wasn't at that point in time conducting any current. Your finger (also not an insulator) closing the circuit however and then allowed current to flow.

Re: The first room-temperature ambient-pressure superconductor?

#320

Post by m463 »

marcosdumay wrote: post #293
obblekk wrote: post #150

The method to produce this material as described in the related paper [1] is fairly simple and could be done at home with a $200 home metal melting furnace from amazon and the precursors (which also seem to be fairly standard easy to obtain metals). If this is real, I'd expect some smart people from hackaday / youtube to reproduce this within weeks if not days. If this is real, it'll change society quickly and perman…

Ok, let me just add the obvious disclaimer: don't try this yourself unless you have a pretty good understanding of chemical lab safety. Really. It's more likely that you will contaminate your land, and possibly your neighbors land too than that you will manage to replicate it.

Yes, but chernobyl produced a lot of useful electricity (at first)
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