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

811–820 of 906 posts

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

#811

Post by pcdoodle »

MayeulC wrote: post #708
pcdoodle wrote: post #436

Earlier quoted context omitted.

Thank bro! are we talking like no heat loss in the traces on the motherboard type a deal or also on a wafer level internal to the CPU?

Probably both? At least the first. For integrated circuits, I think lead is a hard pass (for now), and the deposition process needs to be worked out. Ideally, this could be useful for the hottest paths: clock tree, high-speed buses, as well as the power supplies. There are a few hurdles though: high-speed voltage changes create changing currents, which creates variable magnetic fields, which IIRC may be a problem dep…

Appreciate the follow up. This could be really cool!

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

#812

Post by conception »

Roark66 wrote: post #443
VMG wrote: post #287

Earlier quoted context omitted.

Please don't blow the lead smoke over to your neighbors house though

Seriously, people should stop panicking about lead that much. You know there is this fairly common hobby people have, it's called casting bullets. With lead. I've done it, I know many people that do it regularly and they're all fine. Furthermore, shooting ranges are full of lead in the ground. The laws around here(Poland) require a cleanup by specialised companies every few years and a concrete slab to separate the l…

Actually, firing ranges almost certainly are bad for your health and you should wear a particulate filter when going into one. https://ehjournal.biomedcentral.com/articles/10.1186/s12940-... for instance. I'd wager there is no small link between heavy firearm hobbyist and a proclivity for paranoia, conspiratorial thinking and other Q-Anon adjacent traits.

"No one gets hurt" - perhaps no one dies, but there are no safe levels of lead exposure.

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

#813

Post by tdaltonc »

KevinGlass wrote: post #543
marcosdumay wrote: post #293

Earlier quoted context omitted.

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.

You are vastly overestimating the danger involved in this.

There's no safe dose of lead.

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

#814

Post by nvlstc »

JumpCrisscross wrote: post #394
andreiklochko wrote: post #389

Guys, even if everything in this paper is true, the material as it is might have limited applications. From what they show, the critical field and critical current seem very low. 2500 Oe is like 0.25 Tesla. Even REBCO at 77K is >1T. And 2500 Oe is not even at critical temperature but much lower. From skimming through the article I couldn't find the sample size of the current measurement to get the critical current de…

> the material as it is might have limited applications Is LK-99 part of a larger (either known or emerging) class of materials? I'm not understanding what the lead and copper ions are doing to create internal stress, and why that leads to superconductivity.

Making qp9 to 30 degree

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

#815

Post by legi0nary »

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…

Nilered, your time has come

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

#816

Post by legi0nary »

h0l0cube wrote: post #538
cguess wrote: post #511

Earlier quoted context omitted.

For years, and then after the explosion too. The last reactors were decommissioned around 2015 (it takes years, so the dates are bit washy). Chernobyl wasn't the accident people seem to think. It wasn't inevitable, it was the result of numerous self-serving decisions exacerbated and even required in the very messed up Soviet system of management that enforced following the party instructions over all other possible c…

> numerous self-serving decisions And much of the cost of nuclear is hedging against these decisions, whether by profit-seeking or the tyranny of a totalitarian state

No? Not really? International standards exist

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

#817

Post by adrianmonk »

Sir_Salty wrote: post #785

If you are curious what the betting markets think, Manifold Markets is hovering around 30% with 225 traders that it is replicated before 2025. https://manifold.markets/Mira/will-the-first-roomtemperature... There's a few more similar questions on their news dashboard: https://manifold.markets/home?tab=superconductor%3F

I think you meant to link here: https://manifold.markets/QuantumObserver/will-the-lk99-room-...

The one you linked is about retraction, not replication. Interestingly, they're both near 25%, which seems kinda contradictory. The retraction one has a deadline of Jan 1, 2024, but the replication one is Jan 1, 2025.

There's also this other retraction one with a later deadline of Jan 1, 2025: https://manifold.markets/jack/will-the-first-roomtemperature...

So the market leans toward the idea that it won't be replicated, and it will be retracted in 2024 (or in 2023 but less likely).

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

#818

Post by CamperBob2 »

tdaltonc wrote: post #813
KevinGlass wrote: post #543

Earlier quoted context omitted.

You are vastly overestimating the danger involved in this.

There's no safe dose of lead.

Yes, there obviously is. One attogram is obviously safe. From there, it's necessary to look at the numbers.

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

#819

Post by zamalek »

inglor_cz wrote: post #774
zamalek wrote: post #694

Earlier quoted context omitted.

The changes would be more dramatic than the discovery of fire, but would occur gradually.

The changes introduced by discovery of fire were very gradual. No Internet, no written language at all: any innovation back then could only spread as quickly as humans walked, and would temporarily stop at every significant geographic barrier such as sea. Compared to the discovery of fire, the changes from room temperature superconductors would be a flash fire.

I totally missed the impact of the internet, you are absolutely correct. Something else that I just noticed buried in the paper is that it can be readily deposited onto a substrate (search for UNIVAC in the paper, page 4). That's an incredibly big deal.

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

#820

Post by zardo »

jacquesm wrote: post #666
zardo wrote: post #439

Earlier quoted context omitted.

To turn the magnet off you need to get the current out, I don't see why raising the temperature would make that easy.

Dump it in a bank of capacitors, send it back when you need it. Or in a superconducting loop...

How does the temperature come into play?
Post reply on HN