Chapter 751

Jinling Institute of advanced research, laboratory of materials science.

Standing next to an optical microscope, the boat slightly rotates the fine quasi focus screw to observe the carbon nanotube fiber on the slide.

After about four or five minutes, Lu Zhou's eyes left his eyeglasses and looked at Yang Xu standing beside him.

"Can't you do it a little longer?"

Yang Xu shook his head.

"That's the best we can do."

According to the data observed under the microscope, the shortest sample is only 5-10 μ m, the longer one can reach 2 mm, but the number is very small.

Despairingly, even carbon nanotube samples grown to 2 mm. Compared with the smooth and smooth carbon nanotube wire on that cloth, the sample lying on this slide is just like a pile of beard dregs, or the kind of uneven shaving

I felt my chin and thought for a while, the boat said.

“…… What about the directional growth technology used in SG-1 superconductor? Have you tried? "

"I've tried all the methods you can think of," Yang Xu shook his head. "The pore diameter of this high tensile carbon nanotube is much smaller than that of SG-1 material, so it's difficult to synthesize it by directional growth And ten thousand steps back, even if it can be done in this way, it's hard to accept from the cost point of view, right? "

If the superconducting material is good, it is used in the high-end field itself. If the amount is not large, it is acceptable that it is expensive. But if it's just a tensile material that costs so much blood, it's a little unnecessary.

Looking at the paddle on the microscope, Lu Zhou still asked, "no idea at all?"

"That's not true. There's still a little bit of thinking," Yang Xu handed over a report from the side of the experimental table to Lu Zhou. "According to the feedback information of several groups of experimental data, improving the type of catalyst can effectively improve the proportion of long carbon nanotubes in the product. In terms of this property, this kind of carbon nanotube molecule with nitrogen-containing groups on its surface is very similar to some samples I have done before. "

"So we just need to constantly improve the catalyst to keep the catalyst active during the high temperature growth of the carbon nanotubes, which can theoretically increase its length."

For the growth of carbon nanotubes, the deactivation of catalyst in the process of high temperature growth is an irreversible rule, which is also one of the main reasons limiting the length of carbon nanotubes.

Therefore, improving the catalyst and prolonging its deactivation time is a feasible and cost controllable research idea.

After hearing Yang Xu's words, Lu Zhou nodded and said: " Then do it according to your ideas. If you don't have enough money, just let me know. "

"You can rest assured that I will not be polite to you when there is a shortage of funds," Yang Xu continued with a smile and a pause. "By the way, I have to ask you something. Now the problem of laboratory preparation has been solved Do you need to register a patent? "

After thinking for a while, Lu Zhou said, "first register a carbon nanotube sample, prepare the catalyst for use, and so on."

Yang Xu: "what about the paper?"

Lu Zhou: "after the patent is registered, we can consider sorting out the content other than the preparation process and putting it into a zone."

To keep the synthesis process secret, it is also possible to submit the sample with nitrogen-containing group on its surface as an interesting carbon nanotube.

If we can attract more research institutions to participate, it will also be a good thing for him.

It is not only in the field of materials science, but also in any field of academia. The more hot a problem is, the more research institutions are interested in it, and the faster the results are produced.

If a research institute builds a car behind closed doors and doesn't exchange views with other scholars or research teams, it's impossible to see the results after pondering over a problem for more than ten years.

"Then as you say," Yang Xu nodded and continued, " By the way, what name shall we give it? "

Also did not think much, Yang Xu subconsciously asked this sentence.

However, as soon as this sentence was uttered, he regretted it.

It's just that all the questions have been asked. Now it's too late to repent.

I saw that Lu Zhou was embarrassed to smile, thought about it for a while, and said.

"Just call it n-1."

The naming principle is nothing special, just considering that the nitrogen-containing modification groups on the surface of carbon nanotubes are more characteristic than other carbon nanotubes, so we simply use the letter N to name the series of this material.

As for n-1, it is No. 1 naturally. If a newer type of similar material is developed in the future, it can be inferred directly according to the rule of 1234.

Although he has also considered the names like "super tensile carbon nanotubes" or "carbon nanotubes that are 100 times more tensile than steel" to describe the material's performance, they are too long to write, so he dismissed the idea.He was quite satisfied with his ability of naming. Lu Zhou turned to Yang Xu for questioning. He had intended to ask him for his opinion, but he didn't respond for a long time, so he hesitated to ask.

“…… What's the matter? "

"Nothing..." Yang Xu smiled awkwardly and politely, "I just think it has your style."

Lu Zhou: "...?"

What do you mean?

Look down on my taste for names?

At this time, a phone call suddenly reached the mobile phone of Lu Zhou.

Take out the cell phone and look at it. See it's director Li calling. Lu Zhou and Yang Xu say hello. Then they press the connect button and walk to the corridor outside the laboratory.

"Hello?"

"It's me."

Listen to Director Li's tone is not quite right, Lu Zhou also did not exchange greetings and asked directly.

"What's the matter?"

As expected, director Li's next sentence confirmed his bad premonition.

“…… There is something wrong with the aviation science and technology group. The cooling system of the core cabin doesn't have enough cooling power. "After a pause of about two or three seconds, director Li said heavily," the launch plan may have to be postponed. "

For spacecraft, heat dissipation is a very serious problem, which is also difficult to be found in the design phase. Although the current technology has been able to simulate the total heat production and heat dissipation, the simulation may deviate from the actual situation for various reasons.

For a recent particle, the goes-17 satellite in the United States is vulnerable to solar radiation and overheating due to design defects in its cooling system, which makes it unable to obtain infrared cloud images in time and effectively. At night, like blind people, hundreds of millions of dollars of investment is almost lost.

In a sense, we are very lucky to be able to find problems on the ground. After all, it's almost impossible to overhaul the spacecraft after it has been on for days.

Hearing that there was a problem with the heat dissipation, the boat immediately asked, "can't you fix it by adding a heat sink?"

Director Li said in a heavy voice: "I'm sorry The problem is not in the heat sink, it is said to be in the loop heat pipe. "

As soon as he heard that the problem was on the loop heat pipe, Lu Zhou immediately thought it was not easy.

“…… Do you mean that the whole loop heat pipe has to be redesigned? "

The voice from the other end of the phone brought a little bitterness.

"I'm afraid so."

Lu Zhou: "..."

Ma yeah

Redo loop heat pipe!

What's the difference between this NIMA and removing the whole core cabin shell and sending it back to the furnace?