51–60 of 65 posts
Did they test if it's super conducting?
Out of curiosity, what made you ask this? Is there something about Hydrogen that would elicit such a question, or is that just a question that should be asked of any new material? As I said, I'm genuinely curious. I'm not even an amateur here, but I wouldn't have thought to ask this at all.
Just for reference the pressure at the center of the Earth is estimated to be around 360 GPa, while they are using 495 GPa and DACs able to reach over 700 GPa. https://en.wikipedia.org/wiki/Diamond_anvil_cell
Liquid Metallic hydrogen in Jupiter's core: https://science.nasa.gov/science-news/science-at-nasa/2011/0...
I saw it! A tiny, shiny speck under the microscope, and the thrill of seeing a form of matter which, it can be argued, has never existed anywhere in the universe. Ever.
Would the pressures in a Jovian not be enough to form metallic hydrogen?
https://science.nasa.gov/science-news/science-at-nasa/2011/0...
Earlier quoted context omitted.
If it's stable at room temperature wouldn't it make a really high density fuel too?
I'm no chemist, but I'd expect it to be more of an explosive than a fuel.
Earlier quoted context omitted.
hell with rocket fuel, if the stuff isn't horribly expensive to produce it could be a good portable source period
This makes me wonder, what is the energy density of this stuff? And how easily does it release its energy? (Is it hazardous?)
If I understand it correctly most of the energy (apart form E=mc^2 energy that can't be tapped easily) is what comes from the mechanical work squishing the hydrogen down to size.
That means the energy density should be in the order of the pressure, which is 495 GPa. So a cubic metre of the stuff would have half a terajoule of energy. Wikipedia says the Nagasaki bomb was about 90 terajoules.
If the stuff behaves in a simple way, you can release the energy by just releasing the pressure. If it is "metastable" that means it can somehow remain compressed when the pressure is released -- but will be "trying" to explode to its uncompressed state. We don't know if the metastable state even exists, let alone how easy it is to get out of.
Super cool stuff! There are some greatly quotable sentences in the paper: > Moreover, SMH (solid metal hydrogen) is predicted to be metastable so that it may exist at room temperature when the pressure is released. If so, and superconducting, it could have an important impact on mankind’s energy problems and would revolutionize rocketry as a powerful rocket propellant. > The principal limitation for achieving the req…
If it's stable at room temperature wouldn't it make a really high density fuel too?
Super cool stuff! There are some greatly quotable sentences in the paper: > Moreover, SMH (solid metal hydrogen) is predicted to be metastable so that it may exist at room temperature when the pressure is released. If so, and superconducting, it could have an important impact on mankind’s energy problems and would revolutionize rocketry as a powerful rocket propellant. > The principal limitation for achieving the req…
If it's stable at room temperature wouldn't it make a really high density fuel too?
Did they test if it's super conducting?
Out of curiosity, what made you ask this? Is there something about Hydrogen that would elicit such a question, or is that just a question that should be asked of any new material? As I said, I'm genuinely curious. I'm not even an amateur here, but I wouldn't have thought to ask this at all.
So for this to be exciting we first need the even more exciting news that MH is metastable so that we can release the pressure. Then we can find out if we have a high temperature, high explosive, superconductor.
Even that is probably not of practical use. But by gum! It'd be fun.
Guys, this is literally the holy grail of high pressure physics!
I sent him an email saying 'hey, isn't this what your PhD was on?'. Then, I looked up his thesis and saw that this was his thesis and, but this publication was from his lab, with his advisor as co-author.
Oh man. I hope I didn't cause any existential dread. He didn't just make a decision that cost him a Nobel, right?
> We used type IIac conic synthetic diamonds (supplied by Almax Easy-Lab) with ~30 micron diameter culet flats. About 5 microns were etched off of the diamond culets using the technique of reactive ion etching, to remove defects from the surface. The diamonds were then vacuum annealed at high temperature to remove residual stress. Alumina is known to act as a diffusion barrier against hydrogen. The diamonds, with the…