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Observation of zero resistance above 100 K in Pb₁₀₋ₓCuₓ(PO₄)₆O

arxiv.org

231–240 of 389 posts

Re: Observation of zero resistance above 100 K in Pb₁₀₋ₓCuₓ(PO₄)₆O

#231
And now for a slightly different take on the much-discussed room temp. superconductors:

on the off chance that this LK-99 stuff is actually going to be a thing, how should that influence my investment portfolio over the course of the next five years?

Should I buy lead mining stock ?(joke, obviously, but you get the point).

Re: Observation of zero resistance above 100 K in Pb₁₀₋ₓCuₓ(PO₄)₆O

#232

Summary of events so far: The claim: Room temp (~300K) superconductor exists and we got it! The replication attempts: The production method is so poorly documented only a fraction of the samples being made shows any interesting properties. And among those interesting ones, results varies. Very few, if any, attempt actually completely shows the entire spectrum of properties and behaviors of a true superconductor at ro…

Some literature suggests its a "one dimensiononal" superconductor only kinda works in tiny monocrystaline grains. ...But maybe thats even more interesting for, say, microelectronics? Especially if the resistance orthogonal to the superconductivity is high, if such a thing is even possible?

An even better version of https://en.wikipedia.org/wiki/Anisotropic_conductive_film or "zebra tape", maybe.

Re: Observation of zero resistance above 100 K in Pb₁₀₋ₓCuₓ(PO₄)₆O

#233

I see lead (Pb...something) as main ingredient, isn't it banned in most industries because how toxic it is and how hard it's to handle in industrial scale? isn't that a problem for potential mass applications? (lots of comments about this discovery call this revolution that will change everything around us and that somehow implies mass production I guess)

Lead is still used for example in car batteries (lead-acid), bullets, and solders (electronic components).

Re: Observation of zero resistance above 100 K in Pb₁₀₋ₓCuₓ(PO₄)₆O

#234

I see lead (Pb...something) as main ingredient, isn't it banned in most industries because how toxic it is and how hard it's to handle in industrial scale? isn't that a problem for potential mass applications? (lots of comments about this discovery call this revolution that will change everything around us and that somehow implies mass production I guess)

It's banned in the EU under RoHS .. but with a whole load of exemptions, which make it kind of pointless. I suspect this would be exempted pretty quickly once it became important.

Re: Observation of zero resistance above 100 K in Pb₁₀₋ₓCuₓ(PO₄)₆O

#235

So exciting! Just FYI, the wikipedia page for LK-99 has a very useful tracking grid of replication attempts with sources: https://en.wikipedia.org/wiki/LK-99

That grid is a direct copy of this one here: https://forums.spacebattles.com/threads/claims-of-room-tempe...

…but isn’t sourced, presumably because they don’t consider SB to be professional enough.

Re: Observation of zero resistance above 100 K in Pb₁₀₋ₓCuₓ(PO₄)₆O

#236

For comparison, per this Wikipedia page ( https://en.wikipedia.org/wiki/High-temperature_superconducti... ) currently, the highest temperature, ambient pressure superconductor is around 138 K (−135 °C). I'm no expert but based on my limited understanding, this result (if confirmed) while far from room temperature would still make LK99 a pretty interesting discovery in the SC world. And once a new SC like this is vali…

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Re: Observation of zero resistance above 100 K in Pb₁₀₋ₓCuₓ(PO₄)₆O

#237

I see lead (Pb...something) as main ingredient, isn't it banned in most industries because how toxic it is and how hard it's to handle in industrial scale? isn't that a problem for potential mass applications? (lots of comments about this discovery call this revolution that will change everything around us and that somehow implies mass production I guess)

[deleted]

Re: Observation of zero resistance above 100 K in Pb₁₀₋ₓCuₓ(PO₄)₆O

#239

I see lead (Pb...something) as main ingredient, isn't it banned in most industries because how toxic it is and how hard it's to handle in industrial scale? isn't that a problem for potential mass applications? (lots of comments about this discovery call this revolution that will change everything around us and that somehow implies mass production I guess)

A high chance that lead can be replaced with other metal, from what I heard.

Also, it’s not extremely toxic - romans ate from lead dishes and didn’t even notice the toxicity.

You don’t want to consume it, and you don’t want to breathe it, but it’s not as bad as say, asbestos.

If you have an ICE car, it probably has a lead-acid battery, and the only thing that prevents us from using lead in grid storage is their short lifespan - not health or ecology :)

Also, if you ever took an x-ray, you wore a lead jacket to prevent unnecessary radiation.

If we cannot avoid lead in this alleged superconductor, it may limit applications slightly, but not by much.

Re: Observation of zero resistance above 100 K in Pb₁₀₋ₓCuₓ(PO₄)₆O

#240

Earlier quoted context omitted.

> Worst case scenario, we got another class of high temp (warmer than liquid nitrogen but cold enough that applications are limited) superconductor but nothing revolutionary since at this point, it is pretty conclusive that there is something interesting with LK-99. I don't think that's the worst case scenario. The worst case scenario is that there is actually nothing interesting with LK-99, and everything we've seen…

> I'm actually surprised by the sheer lack of people commenting in the more-or-less-perma-LK-99 threads who show skepticism of the results. There's plenty of people that are skeptical and making it a point to tell everyone they are skeptical. There's plenty of people that are skeptical that are still engaging on the possibility of it being real because it is interesting to do so. There are plenty of people discussing…

Ha, I've been talking about the same topic with an experimental physics professor friend of mine. He was just not interested at all, like "I've seen stuff like that so many times before, I'm not interested at this point. I may look at it when there's a publication in a serious journal." while I was like "Hey it's popcorn time, this is a fun ride, whatever the outcome!". =)
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