Chapter 583: Impossible material

Jinling Advanced Institute.
Institute of Computing Materials.
Yang Xu, who brought the landing boat to the laboratory, sat in front of the computer and called up the test data, and said with emotion.
"It's incredible ..."
For the time being, Lu Zhou did not ask where the incredible was, but went straight to the topic: "What material is that thing?"
"Silver," Yang Xu took a deep breath, "precisely, silver and graphene!"
"Silver and graphene?" Looking at Yang Xu, Lu Zhou said, "That's it?"
In his impression, he seems to have read similar theories.
It's just that there is not much research on metal materials, and I can't remember where I saw them for a while.
To be honest, when he heard only these two materials, he was still a little disappointed in his heart. Although he also knew that even the senior Ming probably would not pile up the cost on a wire, but he did not expect it to be so ordinary.
However, Yang Xu glanced at him silently.
"What are you talking about? Are you pretty good?"
Speaking, as if to prove it, he hit a few buttons on the keyboard.
Soon, a transmission electron micrograph appeared on the screen.
I saw in that image that black and gray patches are interlaced, intertwining a layer of neat and delicate texture in the two-dimensional space of the plane, completely revealing the secret at the nanometer scale in the silver wire. come out.
Pointing at a few key areas in the image, Yang Xu didn't explain much, and continued to say, "Look at these places and you will know."
Leaning closer to the computer screen, Lu Zhou looked in the direction that his index finger was pointing.
I can see that the approximately spherical silver atomic group with a particle size between 1-5 nm is attached to a single layer of graphene with a similar horizontal dimension.
Soon, Lu Zhou's eyebrows frowned slightly.
Even if he didn't do much research on metal materials, he also saw the unusualness among them.
This is not a question of good or bad.
It's a question of whether to do it or not ...
To make graphene alloys based on metal materials, metal nanoparticles and graphene must be bonded.
At present, only the powder metallurgy technology that is less popular is available. However, even with powder metallurgy technology, there is no way to bond graphene to silver nanoparticles to such a perfect degree.
It is no exaggeration to say that the silver wire as thin as hair is an art.
Seeing Lu Zhou didn't speak, Yang Xu continued with a tone of emotion.
"Powder metallurgy is relatively cutting-edge and relatively unpopular. I don't know much about this one. But taking 3D printing technology as an example, the best metal powder is about 10,000 meshes, which is almost 13 microns in conversion. Some nanometers Ceramic materials may be finer, but they are also on the micron scale. "
"Although some laboratories can also achieve ultra-fine grinding of 20nm and below ... but this kind of powder can hardly be stored under normal environment, let alone used for bonding with graphene debris."
Not only is it difficult to prepare, it is difficult to screen, and it is more difficult to save.
The higher the mesh number of the metal powder, the smaller the particle size, the easier it is to be oxidized, and the agglomeration phenomenon is extremely prone to occur.
The only two ideas that seem to work are to either disperse it in a special method while smelting, or to mix and spray this powder with graphene crumbs while forming this powder. On the substrate.
Leaning on the chair, Yang Xu sighed.
"As you can see, the difficulty of this stuff is not in the technology itself, but in the realization of the production process. In fact, it is about the composite materials such as Ag / GF, Ag / GO, AgFe / rGO, because electronics The rapid development of the industry can be said to be endless a few years ago. "
"For example, the indium tin oxide used in making mobile phone screens has fragile properties. Many scholars have proposed combining silver nanowires with graphene for the development of a new generation of flexible flexible screens. According to limited experimental data, this The mechanical properties of this material are very good, and the resistivity is far lower than that of ordinary metals ... When I was a postdoctoral fellow at MIT, there was a laboratory there doing this research. "
Looking away from the screen, Lu Zhou asked, "What about later?"
Yang Xu shrugged: "I don't know, but I guess most of the projects will not go on. Indium tin oxide is not cheap, but silver is better. Even if this technology is done, most people will not use it."
Thinking of this, Lu Zhou's expression was strange.
If silver is a luxury for mobile phone screens, what's the silver wire?
But thinking that if even space travel can do it, most of the space mining will not be difficult, and Lu Zhou will be relieved.
For those who have this technology, silver may be worth a little more than copper.
Looking at the data on the computer screen, Yang Xu's eyes were full of curiosity.
After hesitating, he finally couldn't help asking, "Where did you get this thing from?"
And Lu Zhou feel the same.
In his opinion, the silver wire of thumb length is like an art!
It is no exaggeration to say that its existence has subverted the industry's understanding of metallurgical technology.
However, Lu Zhou did not answer his confusion, but simply answered: "State secrets, you just have to do the reverse for me, knowing too much about other things is not good for you."
Lu Zhou did not explain this problem too much, because it was not necessary at all.
He didn't need to explain anything to anyone even before the Ling Yun Medal.
Or if you take a step back 10,000 steps, even if you need to explain anything, you just need to explain it to one person.
And this kind of thing only happens in one situation.
That was his behavior, which seriously endangered national security.
In addition, it is no exaggeration to say that even those who are responsible for his security work and those who are responsible for keeping him secret have no right to investigate the "secret" itself.
However, Lu Zhou was secretly grateful when he saw Yang Xu's surprised look.
Fortunately, he cut only a short section.
If this guy knows that he still has a bunch of this stuff, I don't know if he will be shocked to doubt life.
"it is good……"
Shrugging helplessly, Yang Xu barely accepted this perfunctory statement.
If confidentiality is involved, knowing too much is really not good for him.
After a pause, Yang Xu continued.
"But it's not easy to reverse this thing. At least I can't figure out how to make this thing for the time being."
Lu Zhou: "What if silver nanoparticles were relaxed to the micron level?"
Yang Xu hesitated and said, "The difficulty still exists, but if you are interested, we can try it. But ..."
Lu Zhou: "But?"
"But does it make sense?" Yang Xu asked ~ EbookFREE.me ~ Although I admit that this Ag / GF material has excellent resistivity characteristics, considering the price of silver, its industrial application prospects Almost zero. "
It took a lot of effort to understand the mystery, and at best it can only produce a "pretty" theory.
This kind of thing may arouse the interest of general researchers, but for Lu Zhou and Yang Xu, it actually has little meaning.
After all, unlike mathematical physics, materials science itself is a discipline based on applications ...
Lu Zhou also thought about this issue for a long time.
To be honest, he was a little hesitant about whether there was any value in recycling this technology.
However, eventually Lu Zhou made up his mind and said.
"I can't answer your question, at least not now."
"But intuition tells me it's worth it."