A room-temperature superconductor? New developments

Post by arcticfox » Tue, Aug 01, 2023, 9:45 PM UTC

mike00632 wrote: post #458

arcticfox wrote: post #239

Earlier quoted context omitted.

I am also completely baffled by this! So many stupid mouse-model medical discovery stories over the years and actually zero LK-99 coverage. It doesn't even matter if it works or not as for whether it's newsworthy; the mystery, human backstory, and Argonne/China/independent scientists jumping to replicate alone is a whole swathe of viable and fascinating topics ready to be published. The crazy thing is NYT just bother…

What should the headline be? "South Korean scientists claim room temperature superconductivity again! Are they lying like their last paper? Let's celebrate!"

Post by Teever » Tue, Aug 01, 2023, 9:45 PM UTC

andrepd wrote: post #391

Teever wrote: post #353

Earlier quoted context omitted.

We'll use them to build spacecraft that retrieve asteroids so rich in gold that it permanently crashes the price of gold? People don't seem to realize how radically society will change if this superconductor thing is legit.

How does room temperature superconductivity lead to the feasibility of asteroid mining? Could you please explain?

Post by anonymous_sorry » Tue, Aug 01, 2023, 9:45 PM UTC

nextaccountic wrote: post #556

fsh wrote: post #516

Earlier quoted context omitted.

None of the things you listed are limited by the conductors in them. The efficiency of high voltage AC power lines is limited by capacitive coupling to ground. Battery charging is limited by the cell chemistry. CPU heat output is limited by the resistance of the semiconductors. Turns out metals (in particular copper) are already incredibly good conductors.

> CPU heat output is limited by the resistance of the semiconductors. Can't superconductor help here?

Post by Geee » Tue, Aug 01, 2023, 9:46 PM UTC

Scene_Cast2 wrote: post #386

Geee wrote: post #225

Earlier quoted context omitted.

Yes, that's quite likely how they come up with this number. But is it enough? What's the most energy dense configuration that can be made with room temp SC and does it compete with lithium batteries?

I just took a look at the source paper [0] """ Although the attainable magnetic flux density limits the energy per unit volume given by Equation (1) ( B2 /2μ o), the real limit of the energy stored in a SMES is mechanical. [...] The relation defines the minimum mass of the mechanical structure in pure tension to support the radial electromagnetic forces. Force-balanced coils [5] minimize the working stress and thus t…

Post by mNovak » Tue, Aug 01, 2023, 9:52 PM UTC

fsh wrote: post #516

jtchang wrote: post #418

The ramifications of the inflection point we are currently at is mind boggling. I had a hard time explaining this last night but we may very well be witnessing the beginnings of a technological transformation era much like when the p-n junction was invented. From the 1940s standpoint it would be hard to envision all we had today. - Lossless transport of energy - Batteries that don't take any time to recharge - Faster…

None of the things you listed are limited by the conductors in them. The efficiency of high voltage AC power lines is limited by capacitive coupling to ground. Battery charging is limited by the cell chemistry. CPU heat output is limited by the resistance of the semiconductors. Turns out metals (in particular copper) are already incredibly good conductors.