Hacker News Board Hacker News, browsed like a classic message board
Live data from Hacker News

The first room-temperature ambient-pressure superconductor?

arxiv.org

Post reply on HN
Print view View original

351–360 of 906 posts

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

#351

Post by reaperman »

xxpor wrote: post #322
sheepscreek wrote: post #48

One of the authors in a related paper[1] is Hyun-Tak Kim. He has many publications in peer-reviewed journals[2]. One even has > 1500 citations[3]. I can't tell if there is a catch anywhere, this seems pretty legitimate. Also, unlike some previous claims that required sophisticated setup to reproduce, this seems dead simple. I think we will hear from other researchers very soon. 1. Superconductor Pb10-xCux(PO4)6O show…

One catch would be the use of lead would restrict the use cases fairly heavily

For the benefits of superconduction, I imagine RoHS exemptions would be made.

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

#352

Post by carabiner »

xxpor wrote: post #322
sheepscreek wrote: post #48

One of the authors in a related paper[1] is Hyun-Tak Kim. He has many publications in peer-reviewed journals[2]. One even has > 1500 citations[3]. I can't tell if there is a catch anywhere, this seems pretty legitimate. Also, unlike some previous claims that required sophisticated setup to reproduce, this seems dead simple. I think we will hear from other researchers very soon. 1. Superconductor Pb10-xCux(PO4)6O show…

One catch would be the use of lead would restrict the use cases fairly heavily

Lead is used everywhere. Not in paint anymore but you can buy lead weights at hardware stores. Don't grind it up and put it in your muni water supply, but it's a household substance that is harmful if ingested, like many others.

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

#353

Post by amatecha »

JumpCrisscross wrote: post #341
xxpor wrote: post #322

Earlier quoted context omitted.

One catch would be the use of lead would restrict the use cases fairly heavily

> the use of lead would restrict the use cases Most people aren't licking the insides of their computer processors, fusion reactors, radio telescopes and MRIs.

It's more about producing toxic waste and contaminating the environment - no one's licking the solder joints in their electronics either, but you still have to use lead-free solder.

For instance in EU, https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX%3A...

Canada, https://www.canada.ca/en/health-canada/services/environmenta...

USA, https://www.epa.gov/lead/learn-about-lead

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

#354

Post by JumpCrisscross »

post-it wrote: post #345
lazide wrote: post #328

Earlier quoted context omitted.

Are you saying superconducting railguns could possibly cause problems?!?

They could only cause problems solvable by more superconducting railguns, so they're a net zero at worst.

> could only cause problems solvable by more superconducting railguns

If the projectile is ferromagnetic, or potentially even just diamagnetic, a defense system involving shaped ultra-high intensity magnetic fields becomes conceivable.

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

#355

Post by overnight5349 »

Maxion wrote: post #162
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…

You need a furnace that can hold a vacuum, though.

In the paper, they sealed the material in a quartz ampuole under vacuum.

I wouldn't call it an easy process, but it's achievable without highly specialized equipment. Just a torch and a vacuum pump.

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

#356

Post by optimalsolver »

WASDx wrote: post #308
botro wrote: post #180

Earlier quoted context omitted.

But they've trademarked the name KL-99 (®) in their follow-up paper: https://arxiv.org/pdf/2307.12037.pdf

Stone age Bronze age Iron age LK-99 (®) age

If this is real, I wouldn't even mind.

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

#357

Post by swamp40 »

swagmoney1606 wrote: post #207
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

Video: https://www.youtube.com/watch?v=EtVjGWpbE7k I really need someone to bring me down a notch. This is too exciting!

The video text says: "The sample was thermally deposited on a copper plate."

The video headline says: "Magnetic Property Test of LK-99 Film".

That's how copper acts with a moving super magnet[0], so the video doesn't really show anything.

[0] https://youtu.be/KrH3t1H6fOc?t=50

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

#358

Post by moffkalast »

carabiner wrote: post #312
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

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

At least now the silo doors will open by sliding on superconductors.

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

#359

Post by pengaru »

swamp40 wrote: post #357
swagmoney1606 wrote: post #207

Earlier quoted context omitted.

Video: https://www.youtube.com/watch?v=EtVjGWpbE7k I really need someone to bring me down a notch. This is too exciting!

The video text says: "The sample was thermally deposited on a copper plate." The video headline says: "Magnetic Property Test of LK-99 Film". That's how copper acts with a moving super magnet[0], so the video doesn't really show anything. [0] https://youtu.be/KrH3t1H6fOc?t=50

The video shows that this is all bollocks

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

#360

Post by refulgentis »

inasio wrote: post #305

- Please check out my paper, we just found a new superconductor, it has a critical temperature of 127 degrees. - Look, I'm a bit busy right now - Celsius

I don't understand, I assume it's a dialogue? What is the meaning of the punchline being Celsius? Does the first sentence intend to include "room-temperature"?
Post reply on HN