Room-temperature superconductor

[AndyBeez]

But I'm open to someone explaining why you'd use enriched uranium 235 for such a thing?

Random gamma rays would certainly do something to the test results. If not turn the test equipment into low grade radioactive waste. Anyway, UE is not something they stock on DigiKey, so I'm wondering where they purchased it from? Just saying

Re the video: can they take their evidence to a jury? A jury comprised of jurors who know the Earth is round and that Apollo did land on the moon? Of course not. Good jurors will ask questions of the scientific and technical evidence presented before coming to a verdict. So unless there is immutable proof that convinces this public jury, maybe they should get on a bike and go ride that solar freekin' roadway back to the land where free energy is in perpetual motion.

Keep calling out

[PlainName]

When did I ever use the word "fraud"?

The word 'busted' implies fraud, scam, misdeed - or whatever other word you want to imply that but be able to say you haven't used - has been outed. And it's not even a diplomatic way of implying it.

[AndyC_772]

"First claimed successful replication of LK-99"

https://twitter.com/Andercot/status/1686286684424691712

[gnuarm]

Nothing wrong with criticism, and the video in question warranted lots of it!

Only because you are reading into it what you want.  The video has virtually no attached text and says nothing itself.  It's silly to make such a big deal of this video.

Potential collateral damage of new discoveries is the only thing I have any issues with, but in this case there is no risk of any collateral damage. The discovery is being replicated currently (or attempted) and we will find out if it's real or not.

We will know, when we know.  Until then, this thread (and the other one) is just gossiping over the back fence.

[gnuarm]

"First claimed successful replication of LK-99"

https://twitter.com/Andercot/status/1686286684424691712

Another video.  I wonder when someone will have the appropriate measurements needed to actually validate or refute this material?

[Marco]

Ignoring LK-99 for a moment, there have been a few papers published recently suggesting graphite is a granular superconductor ... the idea refuses to die.

Comparing the diamagnetism of LK-99 to pyrolithic graphite might not be a good argument against superconductivity. Maybe the diamagnetism there was due to superconductivity all along.

[PlainName]

"First claimed successful replication of LK-99"

https://twitter.com/Andercot/status/1686286684424691712

Another video.  I wonder when someone will have the appropriate measurements needed to actually validate or refute this material?

Perhaps some of these videos (and other things) are posted because the poster isn't sure what they mean, and comments such as we've seen in this thread clarifies the applicability (or not) of the material. For instance, in the Other Thread there were posts of various tubes of different materials being crushed in inappropriate ways, but a non-expert may not realise that and wonder how it might be relevant. By posting in the thread they would get better info, and learn something new to boot.

[SiliconWizard]

LK-99 sounds like the name of an assault rifle.

So, nomination for the Nobel prize yet?

[thm_w]

"First claimed successful replication of LK-99"

https://twitter.com/Andercot/status/1686286684424691712

Another video.  I wonder when someone will have the appropriate measurements needed to actually validate or refute this material?

There were two links, but sounds like its all simulations as to how it might function,
https://arxiv.org/pdf/2307.16892.pdf
https://arxiv.org/pdf/2307.16040.pdf

https://twitter.com/Andercot/status/1686215574177841152

The simulations modeled what the original Korean authors proposed was happening to their material - where copper atoms were percolating into a crystal structure and replacing lead atoms, causing the crystal to strain slightly and contract by 0.5%. This unique structure was proposed to allow this amazing property.

It turns out that there are conduction pathways for electrons that are in just the right conditions and places that would enable them to 'superconduct'. More specifically, they were close to the 'Fermi Surface' which is like the sea-level of electrical energy, as in '0 ft above sea-level.' It's believed currently that the more conduction pathways close to the Fermi surface, the higher the temperature you can superconduct at (An analogy might be how its easier for planes to fly close to the surface of the ocean due to the 'ground effect' that gives them more lift.)

Lastly, these interesting conduction pathways only form when the copper atom percolates into the less likely location in the crystal lattice, or the 'higher energy' binding site. This means the material would be difficult to synthesize since only a small fraction of crystal gets its copper in just the right location.

[EEVblog]

Comments on the simulation:
https://twitter.com/MichaelSFuhrer/status/1686267690770739200

[Marco]

It's possible it's a granular superconductor, with resistance measurements seeing a series of josephson junctions.

[deepfryed]

moreeee news

https://www.fastcompany.com/90932066/team-claims-to-successfully-replicate-lk-99-superconductor

[Psi]

It's going to be a while before we get any hard scientific data on this, assuming it's legit.

If it is legit I expect we'll probably see a lot more positive evidence coming from amateur/backyard scientists first. Well before any official scientific data. Writing papers and getting them reviewed takes ages.

Of course the problem with amateur/backyard scientist data is you need to filter out all the crazies and all the people doing fake stuff for clicks.

[deepfryed]

all the people doing fake stuff for clicks.

that's going to be 99% of the internet 

[Dr. Frank]

moreeee news

https://www.fastcompany.com/90932066/team-claims-to-successfully-replicate-lk-99-superconductor

That's another B.S. article of a science journalists who have half baked knowledge at most.

First off, it must clearly be emphasized, that this levitation effect is no real evidence for SC at all, it could be as well a simple diamagnetic behavior.
Therefore all following statements, that this could be a sign of proof, is misleading.

Second, even the older High T_c type II superconductors did not give a technological breakthrough, as their magnetic properties were too weak to provide SC wires with good properties at liquid nitrogen temperature. To make wires out of Perovskit Ceramics is also extremely difficult, compared to the traditional metallic superconductors. I've heard of some projects using such wires for energy transfer, but I doubt that it is really an industrial application. (*)

It's also not possible to produce mono crystalline and stable layers / structures for Josephson Junction or other Quantum devices.
There was an approach for a JJA from the Jülich Research Center (linked to Aachen and Cologne Universities), the laboratory sample also worked quite ok, demonstrating the existence of Shapiro-steps, but that paper is maybe over 20 years old, and I did not hear anything that you could commercially buy such a device. Would have been great for all of us volt-nuts.

With increasing jump temperature, the magnetic "hardness" (pinning of magnetic field lines) gets worse and worse. So a room temperature superconductor would have even worse characteristics, I guess.

Third, the Nobel Price was also not granted for already existing RT SCs at high pressure, so it's very unlikely that there would be even a nomination.
It might be of academic interest only, but it would not yield new physics and no new revolutionary application as such articles imply.

Think how the discoveries of the Blue LED, the Li system for batteries, the GMR (Giant Magnetic Resistance, Peter Grünberg et al, as well from Jülich) for high capacity HDs, the LASER really changed our lives. That is not to be expected at all from a new class of superconductors. 

There's too much hype and wishful thinking inside this story.

Frank

(*) The City of Munich is planning a 12km long High Voltage line to transfer energy from a power plant to a south access point.
German company THEVA advertises to have working SC cables with Gd, but the latter project is still in evaluation phase , since 3 years. 

[PlainName]

Think how the discoveries of the Blue LED, the Li system for batteries, the GMR (Giant Magnetic Resistance, Peter Grünberg et al, as well from Jülich) for high capacity HDs, the LASER really changed our lives. That is not to be expected at all from a new class of superconductors.

All of those are, to the end user, just better previous products. Blue LEDs are brighter and less boring red ones. Li batteries are longer lasting and more powerful previous ones, etc. (I know it's much more than that, but to the end user with stuff on his desk, that's how it looks.)

Ignoring whether or not this alleged superconductor is real, how would a room temperature superconductor affect the end user? That is, what kind of cool product might he have on his desk that either isn't available now or would be much better?

[Marco]

If nothing else, a cheap room temperature superconductor would be nice for magnetic shielding.

[nfmax]

Think how the discoveries of the Blue LED, the Li system for batteries, the GMR (Giant Magnetic Resistance, Peter Grünberg et al, as well from Jülich) for high capacity HDs, the LASER really changed our lives. That is not to be expected at all from a new class of superconductors.

All of those are, to the end user, just better previous products. Blue LEDs are brighter and less boring red ones.

Rubbish! White LEDs are basically a blue LED plus a phosphor. And white LEDs have revolutionised lighting!

[PlainName]

Think how the discoveries of the Blue LED, the Li system for batteries, the GMR (Giant Magnetic Resistance, Peter Grünberg et al, as well from Jülich) for high capacity HDs, the LASER really changed our lives. That is not to be expected at all from a new class of superconductors.

All of those are, to the end user, just better previous products. Blue LEDs are brighter and less boring red ones.

Rubbish! White LEDs are basically a blue LED plus a phosphor. And white LEDs have revolutionised lighting!

You're getting technical. To the user they are just brighter and nicer than the previous ones.

[PlainName]

If nothing else, a cheap room temperature superconductor would be nice for magnetic shielding.

Sure, but what could you use that for? I mean, what does the average bod need to shield? You don't even need to worry about TV distortion from a carelessly placed super-magnet nowadays.

[thm_w]

Two teams were unable to replicate:
https://arxiv.org/abs/2307.16402
https://arxiv.org/abs/2307.16802

Sounds like they said their sample wouldn't levitate at all.

The phase is confirmed through X-ray diffraction (XRD) measurements, performed after each heat treatment. The room temperature diamagnetism is not evidenced by the levitation of a permanent magnet over the sample or vice versa. Further measurements for the confirmation of bulk superconductivity on variously synthesized samples are underway. Our results on the present LK-99 sample, being synthesized at 925∘C, as of now do not approve the appearance of bulk superconductivity at room temperature. Further studies with different heat treatments are though, yet underway.

[AVGresponding]

Think how the discoveries of the Blue LED, the Li system for batteries, the GMR (Giant Magnetic Resistance, Peter Grünberg et al, as well from Jülich) for high capacity HDs, the LASER really changed our lives. That is not to be expected at all from a new class of superconductors.

All of those are, to the end user, just better previous products. Blue LEDs are brighter and less boring red ones.

Rubbish! White LEDs are basically a blue LED plus a phosphor. And white LEDs have revolutionised lighting!

Yes, it's moved the cost of lighting from electricity to installation and maintenance.  Net savings: zero. What a fucking con

[Psi]

Think how the discoveries of the Blue LED, the Li system for batteries, the GMR (Giant Magnetic Resistance, Peter Grünberg et al, as well from Jülich) for high capacity HDs, the LASER really changed our lives. That is not to be expected at all from a new class of superconductors.

All of those are, to the end user, just better previous products. Blue LEDs are brighter and less boring red ones.

Rubbish! White LEDs are basically a blue LED plus a phosphor. And white LEDs have revolutionised lighting!

Yes, it's moved the cost of lighting from electricity to installation and maintenance.  Net savings: zero. What a fucking con

The LED technology didn't do that, all the manufactures making LED stuff designed to fail did.
They simply run them way to hot. Driver and LEDs.
Build your own LED lighting and avoid that issue.  Good quality LED strip lighting is one option. Keep its temp under 50C and it will last 20 years. Maybe more.

Or you can even just disassemble off the shelf LED lamps (kind that fail often) and change the resistor/cap to reduce the brightness and get the heat under control. Then they will last at least 4x longer

[gnuarm]

Think how the discoveries of the Blue LED, the Li system for batteries, the GMR (Giant Magnetic Resistance, Peter Grünberg et al, as well from Jülich) for high capacity HDs, the LASER really changed our lives. That is not to be expected at all from a new class of superconductors.

All of those are, to the end user, just better previous products. Blue LEDs are brighter and less boring red ones.

Rubbish! White LEDs are basically a blue LED plus a phosphor. And white LEDs have revolutionised lighting!

Yes, it's moved the cost of lighting from electricity to installation and maintenance.  Net savings: zero. What a fucking con

The LED technology didn't do that, all the manufactures making LED stuff designed to fail did.

Not sure what you are going on about.  LED bulbs work just fine.  But they can't tolerate high temperatures, they are electronics, like your phone or PC.  But people forget that their light fixtures were designed for incandescent bulbs which only work when they are very hot.  So the recessed ceiling fixtures that allow no cooling will result in premature overheating failure.  Same with bulbs enclosed under globes.  It's up to the user to use them properly.

They simply run them way to hot. Driver and LEDs.

Not the makers, the users.

Build your own LED lighting and avoid that issue. 

Only if you give them adequate ventilation.

Good quality LED strip lighting is one option. Keep its temp under 50C and it will last 20 years. Maybe more.

Or you can even just disassemble off the shelf LED lamps (kind that fail often) and change the resistor/cap to reduce the brightness and get the heat under control. Then they will last at least 4x longer

Or, just install them where they can get air flow.

[Dr. Frank]

Think how the discoveries of the Blue LED, the Li system for batteries, the GMR (Giant Magnetic Resistance, Peter Grünberg et al, as well from Jülich) for high capacity HDs, the LASER really changed our lives. That is not to be expected at all from a new class of superconductors.

All of those are, to the end user, just better previous products. Blue LEDs are brighter and less boring red ones. Li batteries are longer lasting and more powerful previous ones, etc. (I know it's much more than that, but to the end user with stuff on his desk, that's how it looks.)

Ignoring whether or not this alleged superconductor is real, how would a room temperature superconductor affect the end user? That is, what kind of cool product might he have on his desk that either isn't available now or would be much better?

For all the mentioned technologies, Nobel Prices have been granted, because they really revolutionized our daily life; that's been the reasoning of the Nobel Prize committee.
Your statement about Blue LEDs is complete nonsense.
Only these made white light available for portable and battery driven devices.
Only Li batteries also made all these portable devices useable.
I.e. there would be no smart phones w/o both inventions.