Although he was busy until two o'clock in the evening last night, the next day, Xu Chuan still got up from bed at seven o'clock.

After a brief wash and breakfast, he quickly rushed to the institute.

The test of high-temperature copper-carbon-silver composites is not over yet, and last night, he and Song Wenbai only tested the superconducting critical Tc temperature and the Midas effect. It is confirmed that the new copper-carbon-silver composite can be transformed into a superconducting state at a temperature of 152 K.

And there is more to a material than that.

In addition to the mechanical properties of ordinary materials and the measurement of electronic properties, superconducting materials also have unique boundary current density, vortex pinning performance, and magnetic field capture tests.

In addition to the ordinary characteristics of mechanics and electronics, the subsequent superconductivity test is the key to the quality of a superconducting material.

For example, the critical current density refers to the maximum current density that can be achieved in a certain chemical environment, and there will be no electrode corrosion or chemical impedance change even at the maximum current flow.

If you have a little knowledge of superconductors, you generally know that superconductors have the concept of a critical temperature Tc. It is the temperature at which a normal-phase material is transformed into a superconducting material.

But superconductors not only have a critical temperature, but also a critical current density and a critical magnetic field strength.

As soon as the temperature is above the critical temperature/the current density exceeds the critical current density/the magnetic field strength exceeds the critical magnetic field strength, there will be a transition to the normal phase.

In other words, too high a temperature, too much current, and too strong a magnetic field can all cause superconductors to lose their superconductivity.

However, there are no materials with high critical temperature, high critical current density and high critical magnetic field density in the prepared superconductors, so the application of superconductors is not extensive.

But because of this, the study of superconductors is of great value.

If the "three highs" superconductors (high critical temperature, high critical magnetic field, and high critical current density) can be found, they will have broad application prospects.

Therefore, although related research is not the most popular, it has always been one of the important research directions in the field of condensed matter physics.

How to improve the critical current density and critical magnetic field density is also the most cutting-edge research direction in the field of superconducting materials.

Therefore, in the next time, Xu Chuan needs to conduct a complete test of the high-temperature copper-carbon-silver composite superconducting materials he prepared. to determine the parameters of various aspects of this new material.

In addition, he needs to industrialize the product as soon as possible.

After all, time waits for no one, and the controllable nuclear fusion project has begun, and he is more willing and familiar with the copper-carbon-silver composite high-temperature superconducting materials developed by himself in later generations than using other superconducting materials, such as copper-oxide-based superconducting materials to make magnetic confinement devices.

On the one hand, it is not only because of the familiarity with the properties of copper-carbon-silver composite high-temperature superconducting materials; On the other hand, copper-carbon-silver composite high-temperature superconducting materials can provide a magnetic field strength far beyond ordinary superconducting materials.

The reason why large strong particle collisions can take tens of kilometers at every turn is not only because the particles need to be accelerated to the extreme, but also because the superconductors that provide the magnetic field have a limit.

For example, the LHC collider at Euratom uses a magnet made of niobium-titanium (NbTi) superconducting material, which currently provides only 8.3 Tesla magnetic field strengths.

The performance in this area severely limits the collision energy level, and the current collision energy level limit of the LHC is around 13Tev.

However, if the magnetic field strength can be doubled to 16T, then the collision energy level can be increased to 100Tev on the scale of LHC.

The strength of the magnetic field doubles, and the collision energy level can be increased by nearly eight times.

This is where the critical magnetic field of superconducting materials comes in.

In controlled nuclear fusion, the importance of the critical magnetic field strength is even more important.

A high critical magnetic field can provide a higher magnetic binding force, and it is impossible for Xu Chuan to build the reactor into a giant reactor with a diameter of more than ten kilometers in order to improve the binding force, which is not realistic.

Therefore, raising the high critical magnetic field is his only choice.

At present, the superconductor material with the highest critical magnetic field is the magnesium diboron ultra-low temperature superconductor material researched by Sakura Country, which can reach a magnetic field strength of 40 Tesla.

The strength of the magnetic field at 40 Tesla doesn't sound like an exaggeration, but it's actually quite impressive.

A simple comparison will you know.

Take the refrigerator, a common appliance in the home, as an example. The magnet used in the refrigerator is only one hundredth of a Tesla, which is 0.01T.

In contrast, the value of 40T is very exaggerated.

However, due to the shortcomings of the material itself being difficult to shape and requiring extremely low critical temperatures, this magnesium diboron low-temperature superconducting material cannot be widely used in instruments and equipment, and is only used for laboratory research.

Although conventional copper oxide superconductor materials can also provide a magnetic field strength close to about 20T, they also have the disadvantages of magnesium diboron ultra-low temperature superconductor materials.

As for copper-carbon-silver composite high-temperature superconducting materials, the magnetic field strength of the materials he studied in later generations is about 16T.

In this life, I don't know how much critical magnetic field strength has been calculated and prepared by using the mechanism of high-temperature superconductivity and mathematical models.

Computationally speaking, the solid magnetic field strength of this new copper-carbon-silver composite high-temperature superconductor should reach more than 20T.

How much you can achieve will only be known after passing the test

In Fan Pengyue's office at the Chuanhai Materials Research Institute, Xu Chuan touched his face a little unnaturally, feeling as if there was something on it.

On the other side, his master Xiong Fan Pengyue was staring at him with an extremely strange look.

Being a little unbearable, Xu Chuan coughed, interrupted this weird atmosphere, and said: "I said, it's not the first time we've met, what are you staring at me like this, I don't have flowers on my face." ”

Hearing this, Fan Pengyue said strangely: "Are you really a person? ”

The corners of Xu Chuan's mouth twitched, and he said: "It's not necessary, although the results of 152K high-temperature superconducting materials are indeed amazing, it is not impossible." ”

Hearing this, Fan Pengyue wanted to roar, he felt that his three views were being challenged infinitely.

"Yes, 152K high-temperature superconductivity is indeed not impossible!"

"But you didn't take the superconducting material data from me half a month ago!"

"Don't tell me, you did materials research when you were studying math at Princeton!"

"Be human!"

You must know that when he studied tungsten diselenide two-dimensional materials with his supervisor during his doctoral period, he worked hard for more than a year and did not find the correct route for the synthesis of tungsten diselenide.

In less than half a month after getting the superconducting material data, this monster increased the Tc critical temperature of superconducting materials from 43.5K to 152K, which was an increase of more than 100K, not to mention, and directly broke the current record of high-temperature superconducting materials.

To be honest, he wanted to cut open the monster's brain to see if there was a quantum computer inside.

Xu Chuan sighed and said, "Don't talk about it, there are still a lot of things to be busy in the future." Let's finish testing this material first. ”

Talking about business, Fan Pengyue was also serious, he thought for a while and said: "The testing of materials should not be a problem. Although there are some parameters that we still lack equipment and can't do, it will definitely be no problem for you to come forward and borrow relevant equipment from NTU. ”

"You and Song Wenbai have completed the preliminary test last night, 152K high-temperature superconductivity, even if its performance in other aspects is weaker, this temperature is destined to its application prospects are quite extensive."

"Judging from the ultra-low temperature copper-carbon-silver superconducting materials studied by Song Wenbai before, the performance parameters of the material you studied should not be low."

As he spoke, he seemed to remember something, looked at Xu Chuan and asked, "If I guessed correctly, your material should be studied with theoretical and mathematical models, so you should have the prediction data of its relevant parameter performance in your hand, right?" ”

After a pause, he interrupted his words again, and continued: "No, there must be, Song Wenbai reported that you directly and accurately predicted its critical Tc temperature yesterday, so there must be other critical current and critical magnetic field data." ”

Xu Chuan nodded and said: "Yes, theoretically speaking, the critical magnetic field of this copper-carbon-silver composite high-temperature superconducting material should be able to reach more than 20T, as for the critical current, this needs to be judged according to the temperature and critical magnetic field." ”

Hearing this, Fan Pengyue gasped: "20T critical magnetic field? Are you sure you're right? That's a scary number! ”

Xu Chuan smiled and said, "It's okay, 20T is a conservative estimate, according to the theory, if the perfect state its critical magnetic field can reach up to 28.74T." ”

"Of course, this data should not be possible in reality."

Hearing this, Fan Pengyue couldn't help but swallow his breath and said, "If that's the case, the value of this superconducting material will be great." ”

"Before, I was still thinking about how you plan to deal with this material in the future, whether to apply for a patent like the previous artificial SEI film, or whether you are going to build your own factory to produce and sell finished products."

"Now it seems that building our own factory is the only way."

"This level of high-temperature superconducting materials, I'm afraid that if you want to apply for a patent, you may be consulted above."

"Although there are still some differences between papers and patents and actual manufacturing and technology, this kind of importance is extremely high, and even involves the material of national development, I am afraid that the above will not easily agree with you to publish the paper, right?"

After a pause, he remembered something again, and then asked, "Can you make wires from this material?" How well does traditional mechanics and electricity behave? ”

Xu Chuan thought for a while and said: "It should be possible to manufacture wires, and the traditional mechanical and electrical properties are theoretically better than copper-oxide-based high-temperature superconducting materials." ”

"But because of the crystal structure, it is still more inclined to the solid state of ceramics."

"If you want to apply it to power generation, transmission, energy storage, weak electricity and other fields on a large scale, it is still difficult at present."

After a pause, he added: "Of course, I will study and optimize it again during this time to see if I can continue to improve its performance." ”

"Or, to see if we can change or dope some other materials, and optimize its traditional physical properties without affecting or having a small impact."

PS: There is still a chapter asking for a monthly pass at night!

(End of chapter)