Starting from a top student and marching towards the sea of ​​stars

Chapter 182 No, I think it also has application space

"Next, please let Ning Chen explain to us some important parts of these papers, as well as some iron-based superconductors that can be processed into superconducting wire strips." Sun Jian said.

This time, Ning Chen was not as reserved as when he first came to the laboratory. After getting familiar with it, Ning Chen knew that the people here were still very friendly to him.

In addition to Ning Chen's outstanding scientific research ability, his status as an alumnus of Shengzhou University also played a very important role.

This made Ning Chen no longer worry about so many other issues, and he could safely focus on scientific research.

Because there is so much content in these papers, Ning Chen cannot give a particularly detailed explanation. He can only select a few important parts to explain first.

"First of all, what I want to introduce is this new type of iron-based superconductor with a superconducting critical temperature of 65K. The synthesis method of this material is to plate a FeSe single atomic layer film on an SrTiO3 substrate..."

Everyone listened to Ning Chen's explanation very carefully and recorded some key points from time to time.

After all, Ning Chen is an academic leader who has published 8 papers in the official issue of Nature. This opportunity to listen to lectures at close range is still very precious.

Ning Chen briefly explained to everyone the 65K iron-based superconductor and the "1144" new iron-based superconductor system, and an hour had passed.

At this time, Sun Jian asked:

"Ning Chen, these new superconductors should not be suitable for using the powder tube method to prepare wire strip materials, right?"

The powder tube method is a relatively common processing method used by the previous project team to process superconducting wire strip materials.

The general process of this method is to evenly and densely install the appropriately proportioned superconducting material powder into the silver tube, and then draw or forge it into the required wire strip form.

After that, in order to obtain higher quality wire and strip materials, it is often necessary to continue rolling, pressing, and heat treatment one or more times.

"Yes, Professor Sun, these new iron-based superconductors are no longer suitable for wire and strip processing using the powder tube method. My personal idea is that these iron-based superconductors are more suitable for pulse laser deposition methods, or molecular Beam epitaxy method is used to prepare wire strip materials.”

After hearing these two methods mentioned by Ning Chen, everyone's expressions couldn't help but become serious.

Because these two methods are very difficult to process in the laboratory, they have to face many problems if they want to be promoted commercially.

At this time, a person raised his hand and asked:
"Ning Chen, the wire and strip processing of these new iron-based superconducting materials involves the preparation process of thin films. The processing cost is very high and the process is also very complicated. It should be difficult to find application space in the future, right?"

After listening to this person's question, Ning Chen nodded and replied:

"Yes, as you said, the processing cost of these iron-based superconductor wire strips is indeed high and the process is relatively complex. But this does not mean that it is difficult for them to have any application space. Because superconductor wire strips Materials are not only used in commercial power transmission, but may also have application space in other fields."

After hearing Ning Chen's explanation, many people immediately reacted.

Including controllable nuclear fusion, quantum computing, various high-energy physics experiments, etc., superconducting materials will be used.

The superconducting materials used here do not use a large number of superconducting wire strips like in power transmission, but they are also part of the application of superconducting.

Since different fields often have different requirements for the properties of superconducting materials, it is very meaningful to conduct research on superconducting wire strips of more types of materials.

After Ning Chen's explanation and everyone's discussion, everyone believed that the iron-based superconductors proposed by Ning Chen have certain research value on wire and strip materials.After confirming this, Sun Jian organized everyone to work together to re-formulate the experimental plan for the subsequent experiments.

Because the Shengzhou National Laboratory of Materials Science has also purchased the latest MBE equipment, there is no problem in preparing iron-based superconductor wire strips through molecular beam epitaxy.

"Ning Chen, you are familiar with this part of the material synthesis process. You will be responsible for leading the research on this type of iron-based superconductor wire strip materials."

Ning Chen is not ready to accept such a role, but Ning Chen also knows that he is definitely the most suitable person to take on this responsibility.

"Okay, Professor Sun, I will try my best to do these things well."

After formulating a rough experimental plan, Ning Chen studied the specific experimental plan that afternoon.

Different from the previous preparation of this thin film iron-based superconductor material, the preparation of wire and strip materials requires the preparation of more slender materials, so it is not feasible to directly apply the previous laboratory preparation methods.

After some thinking, Ning Chen changed the previous plan and optimized a new plan suitable for wire and strip material preparation.

After confirming the specific experimental plan, Ning Chen called several people in the laboratory together to explain his ideas.

"In order to prepare more slender wire strip materials, we need to adjust the base material. This is the 'long base strip' type substrate I designed, which is very suitable for the processing of this kind of wire strip..."

Looking at the design method on Ning Chen's computer screen and listening to Ning Chen's explanation, everyone felt that this plan was completely feasible in theory.

However, the actual operational difficulty of this plan is undoubtedly very huge.

"Ning Chen, this plan requires very delicate experimental operations. If you are not careful, the wire strip will deviate from the direction of the base, causing damage or even breakage to the wire strip."

"Yes, this kind of operation is indeed very difficult, but we always have to try it. I have done similar experiments many times. Although the difficulty is not as high as this one, it still has some experience. I believe we have capable of completing this challenge." Ning Chen said.

The small team led by Ning Chen is generally relatively young, and they are all researchers and graduate students. This also allows Ning Chen to not feel so much pressure when getting along with them.

After introducing their experimental plan to everyone, everyone started the preparation of superconducting wire strips using MBE equipment.

At the beginning, the experiment went very poorly, but this was completely as expected by Ning Chen.

After all, just using MBE to prepare thin films is already difficult. Replacing the base material with a long base is undoubtedly even more difficult.

This is like going to an ice rink to skate alone. Before, you only had to skate freely on the ice without falling.

But now, it is necessary to slide strictly in a straight line without any deviation in the direction.

Fortunately, Ning Chen and others maintained a very good mentality and did not have any impatience or complaints because of the failure in front of them.

And besides Ning Chen, others are also familiar with the operation of MBE, unlike Xu Zhou and Sui Feng, who are just coming into contact with MBE equipment for the first time.

After constant attempts, Ning Chen and several people made continuous progress in the preparation of online strips.

(End of this chapter)