441–450 of 906 posts
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…
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?
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…
Please don't blow the lead smoke over to your neighbors house though
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 lead/soil mix from the groundwater near the targets, but still there are tons of the stuff just sitting there for years and no one gets hurt. Fun fact. These specialised cleanup companies don't cost anything for big ranges. They're either free, or they pay the shooting club that owns the range money, because the lead they recover is worth a lot.
Earlier quoted context omitted.
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
> more about producing toxic waste Compared to refining traditional conductors and recycling/disposing of used electronics? > you still have to use lead-free solder One, fumes. Two, people touch their solder and then grab a cookie. We're premature. The results need to be proven. But the benefits of RTP superconductors is mindblowingly high enough that risks from lead contamination (far from a novel problem, I might a…
IMO, the most dangerous thing about lead solder is cleaning the iron. Both the common methods (damp sponge and brass wool) create many tiny little balls of solder that are hard to see and bounce about all over the place. Because of the high density of lead they're less affected by air resistance than you might expect, and they roll easily, so they can move surprising distances. They can easily end up caught in clothing, and from there fall into food. This will result in much higher lead ingestion than just touching solder then touching food.
I personally always use lead-free solder. If you have a good temperature controlled soldering iron it's nearly as easy to use as leaded solder.
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…
What, exactly, are the "world changing" applications? Perhaps my imagination isn't up to the task of seeing this. What I see is a novelty for physics students to levitate magnets without the need for liquid nitrogen, and perhaps it will make some quantum computing designs more efficient (and therefore render PKI obsolete. yay?)
Earlier quoted context omitted.
But it wouldn't lock the target in place when they stop, which is what this video demonstrates very well. The conductor would move towards the magnet and try to stick to it.
>The conductor would move towards the magnet and try to stick to it. No, only ferromagnetic material would behave like that. Copper foil will also move in a moving magnetic field, and won't be attracted to a stationary magnet.
If it is real though, this is a massive step up for humanity. The stuff of science fiction.
the patent application is here https://patents.google.com/patent/WO2023027536A1/en?oq=WO202...