Chapter 261 Absorbing Materials

Since ancient times, the tactics of improving the concealment of weapons and launching surprise attacks to deliver a fatal blow to the enemy when the enemy is unprepared have been highly regarded.

For example, in the ancient history of China, the famous Jing Ke assassinated the King of Qin by placing the dagger on the map to achieve visual invisibility of the weapon, which almost cost the life of a great emperor.

With the development of science and technology, radar waves, infrared rays and other methods can be used to detect opponents at ultra-long distances. How to maintain the stealth of weapons is a goal that all countries are pursuing.

Stealth aircraft was born in this context.

It uses a variety of stealth technologies to reduce the signal characteristics of the aircraft, making it difficult for enemy radars to detect, identify, track and attack, in order to achieve the purpose of anti-radar, anti-infrared, anti-electronic, and anti-sound wave detection, thereby achieving the stealth effect. combat aircraft.

The first generation of stealth aircraft was born in the United States, represented by the F-117A "Nighthawk" stealth fighter-bomber, and culminated in the famous Phantom B2.

This is an aircraft that can change the landscape of air combat.

In the 1990s, after Mr. Shah invaded Mr. Sha, the United States launched the Desert Shield Project and sent 45 F-117As to Mr. Sha's base.

This is the world's first large-scale use of stealth fighters in combat.

In this war, the F-117A showed its talents. The first wave entered Mr. Yi's airspace and quietly passed through the gate of Mr. Yi's airspace. It dropped bombs directly at a height of less than 600 meters from the ground. Accurately destroy a large number of Yi classmates' key facilities such as radars, anti-aircraft guns, and anti-aircraft missile positions.

This war allowed everyone to see that this is how modern war is fought.

At the same time, it also woke up all the countries in the world, including a certain rabbit on the peninsula who beat up a hawk with millet and a rifle.

Everyone is reflecting on whether Student Yi could survive or win if he were in his place.

But no matter how you calculate, the final result points to a path that is impossible to win.

Even if it has a broader strategic depth, more personnel advantages, and stronger beliefs, it is almost impossible to form effective resistance in the face of this new era of war.

This battle woke up and scared all the audiences around the world.

Since then, the development of modern weapons and stealth aircraft has officially entered the eyes of all countries.

After learning some information from Fan Pingbo and Qin Anguo, Xu Chuan realized how important the radiation energy absorption and conversion technology he had developed in the nuclear energy beta radiation energy concentration and conversion electric energy mechanism technology was.

At present, the top stealth coating materials in various countries account for less than 20% of the overall stealth of fighter jets.

However, the absorption of beta rays and gamma rays by the radiation gap reaches more than 40%. If it can be converted into the absorption of electromagnetic waves, then the invisible coating material produced by this new technology can be said to be 'Super invisible material'.

If this 'super stealth coating material' is applied to fighter aircraft, the stealth effect of the fighter aircraft will not only be doubled, it will also be much stronger than before.

Although the stealth effect of a fighter plane does not entirely depend on the stealth coating material, but also on various factors such as aircraft model design, surface wrinkles, external protrusions, and gaps in the fighter plane. But at least, there is no problem in catching up with or surpassing the American F35.

After all, among the various stealth factors of stealth fighters, coating materials are the most difficult to develop and innovate. Stealth coatings are also the first line of defense when a stealth fighter is scanning opposite radar waves. Its importance is self-evident.

After thinking about it, Xu Chuan said: "Theoretically, it should be feasible to apply radiation gap technology to the absorption of conventional electromagnetic waves. It is just that we may need to find the most suitable material that can maximize electromagnetic radiation. The absorption can meet the performance of the fighter jet.”

"I remember that fighter planes fly very fast in the sky, and the resulting high temperatures need to be addressed."

Hearing this, Academician Fan Pingbo of the Aviation Research Institute nodded and said: "Yes, when flying at high altitudes, fighter jets fly very fast and generate a lot of heat due to friction with the air, especially supersonic fighters, such as three times the speed of sound. Grid-25, the stagnation point temperature of the body surface is as high as over 500°C at maximum speed.”

"It's not just high temperatures, it's super low temperatures."

"The current ceiling of mainstream fighter jets is about 20,000 meters. At this altitude, the ambient air temperature is about minus 55 degrees. In this environment, the impact of ultra-low temperature on the stealth coating also needs to be taken into consideration."

"In addition, there are other aspects that need to be taken into consideration when flying at low altitudes, such as friction with small floating objects in the air, such as dust, condensation nuclei, etc., as well as the viscous effect of airflow."

After a pause, Academician Fan Pingbo smiled and continued: "Of course, these things are things that need to be considered in aerospace. Professor Xu, you don't have to worry about these."

"Today, the first thing we need to confirm is whether this technology can be applied to the absorption of conventional electromagnetic waves. If it can, then we need to consider the follow-up."

Xu Chuan nodded and confirmed again: "Theoretically, this should be feasible, but I can't give much advice on coating materials."

"But based on my own considerations, I can provide two or three materials that may be suitable."

Hearing this, Fan Pingbo immediately sat upright and said solemnly: "You say it."

On the other side, Qin Anguo had already taken out a notebook from his bag, ready to record his words.

Xu Chuan cleared his throat and said, "In theory, graphene is a very suitable material. According to the characteristics of graphene, it can absorb electromagnetic waves, and the absorption efficiency is quite high. If it can be used to make radiation gap graphene, I believe its absorption rate of traditional electromagnetic waves can be improved."

"It is different from traditional magnetic loss characteristic materials in that this material has a high absorption efficiency for infrared rays. In the temperature range of 20-30 degrees, the absorption rate of graphene itself for 1 wavelength of infrared rays can reach more than 80%, which can greatly enhance the stealth performance of fighter jets."

"And considering that the high-speed flight of fighter jets will generate a lot of heat, graphene materials also have excellent heat dissipation performance, which can further enhance the concealment effect of infrared detection."

"In addition, facing the ultra-low temperature of minus fifty degrees at an altitude of 20,000 meters, graphene can also have a stable form."

For a whole day, Xu Chuan was in the living room communicating with Qin Anguo and others about the "radiation gap" technology.

It is not only suitable for the types of stealth coating materials, but also some key and other things in the preparation of radiation gap materials.

For Xu Chuan, he is not like some scholars who mind that his knowledge is applied to the military.

As the great man said, it is not the same to have no sword in hand and to have a sword but not use it.

Force, no matter when, is the most basic condition to ensure one's safety.

After communicating in the villa for about two days, Qin Anguo left with several experts, and Xu Chuan also adjusted his life back to normal.

The analysis of inert neutrinos has been completed. The next work is naturally to contact CERN and make it public.

Turning on the computer, Xu Chuan skillfully flipped to the mailboxes of CERN, Witten and others, and sent the results of his analysis.

He can't go to the European Organization for Nuclear Research now, and can't hold a press conference there, so he can only deal with it in this way for the time being.

After finishing the email, Xu Chuan leaned back and looked out the window against the chair.

After the efforts in the second half of last year, both the nuclear energy project and the Sichuan-Hai Materials Research Institute have entered a phased suspension of research and development.

The follow-up of the former needs to wait until the research institute in Qidong is built. The customized linear particle accelerator is still being manufactured in an expedited manner. Without experimental sites and equipment, the subsequent cycle cannot be started.

Of course, the test of radiation gap materials is still in progress. After waiting for the test, it will be around March, and the research institute will also be done, so it can continue naturally.

As for the latter, the Chuanhai Research Institute is currently applying for patents in various countries, and researching lithium batteries such as lithium-sulfur batteries and lithium-air batteries.

After all, after the problem of lithium dendrites is solved, not only lithium-ion batteries can achieve rapid breakthroughs, but lithium-sulfur batteries and lithium-air batteries can also see the dawn of hope.

The latter two are based on the solution of the problem of lithium dendrites.

If possible, Xu Chuan hopes to grasp the development of the battery field in his own hands. This is a very large market, and there are still many cakes that have not yet been developed.

As long as the lithium battery market is seized, then his subsequent scientific research funds, at least in the short term, will not have to worry about.

Regardless of nuclear energy

After thinking about it, Xu Chuan stood up, controlled the computer to connect to the academic affairs system of Nanjing University, and submitted his name in the course arrangement application.

At present, he does not have much to do in the next month or so. In this case, he should pick up his job as a professor at Nanjing University.

That's right, from beginning to end, after returning to China, his most essential job is to be a mathematics professor at Nanjing University, who has not yet attended a single class.

Whether it is a nuclear energy research project, a lithium battery project, or other things, they are all extra work outside of the main job.

Thinking about it this way, it is really not worth the salary given by Nanjing University.

At present, his salary consists of two parts. One part is the allowance issued by the state before returning to China, a special allowance of 12.5 million per year, which does not need to be deducted or anything, and is directly issued.

The other part is the salary of a professor at Nanjing University, which is 3 million per year after tax, but after winning the Nobel Prize, this salary has doubled to 6 million.

These two parts are basic salaries, in addition to various benefits and subsidies.

As the first scholar in history to win both the Nobel Prize and the Fields Medal, this salary is not very high, apart from the state subsidies.

However, Xu Chuan does not care much about these. He is not short of money. He is short of money for some future research and development. For example, the subsequent research and development of lithium batteries by the Chuanhai Materials Laboratory basically involves tens of millions of dollars.

Nanjing University, Academic Affairs Office.

A young teacher is sitting in the office arranging courses. Although the school has started and the professors have submitted their courses, there are always some unexpected things in life. Some courses need to be adjusted temporarily. The Academic Affairs Office also has special teachers or assistants to take charge of this aspect.

"Fuck? Am I seeing it wrong?"

While arranging the course, the young teacher suddenly exclaimed, and several colleagues in the quiet office immediately cast curious eyes over.

Rubbing his eyes, the young man in charge of arranging courses looked at the screen again. Only after he confirmed that he had not seen it wrong did he raise his head in disbelief: "Guess whose name I just saw on the academic affairs system!"

"Xu Chuan!"

"Chuan Shen actually submitted a course application!"

As soon as this was said, the office suddenly became noisy.

"Are you sure?"

"Xiao Xu, you must have seen it wrong. Chuan Shen is so busy, how could he have time to teach?"

"You must have seen it wrong. Chuan Shen didn't teach a single class in the second half of last year. It's only the beginning of the year. How can he have time to teach?"

In the office, other people started discussing.

In this office, or in the entire Nanjing University, who hasn't heard of the name Xu Chuan.

At the beginning, many students, teachers, professors, and even people from other colleges and universities in Nanjing University were looking forward to the class of this great god. After all, this is the first Nobel Prize + Fields Medal double winner in history.

But with more expectations, there are naturally more disappointments.

After returning to China, although this big guy got a professorship at Nanjing University, he hasn't taught a single class in the past six months.

Gradually, no one expected this big guy to give a lecture.

Of course, most people can understand that, after all, he is such a top boss, and he must have more important things on his hands.

No one expected that at the beginning of 2019, this big guy actually submitted a course schedule.

It was incredible.

For the Academic Affairs Office, Xu Chuan's teaching arrangement was a big deal, especially since this was the first time this big guy gave a lecture.

Because they couldn't believe it, the Academic Affairs Office even made a special call to ask if he was real, which made Xu Chuan, who received the call, laugh and cry.

After confirming that the teaching course was real, the staff of the Academic Affairs Office quickly arranged it and reported it to the school leaders.

At noon that day, the campus network updated the news, and then, students who paid attention to the course schedule immediately took pictures of the pictures on the school's Stone Forum.

[Fuck, I just went to see the course schedule, guess whose name I saw! ! ! ! ]

[Who? ]

[Xu Chuan! Chuan Shen! The latest course schedule released by the Academic Affairs Office actually has Chuan Shen's course! ]

[Don't make a fuss, it must be someone with the same name. That guy didn't teach a single class last year. ]

[No, I just consulted the teacher in the Academic Affairs Office, it's true! ]

[What the hell? ]

[What the hell! ]

[Is it true, Chuan Shen is teaching? When, where, which day, what class? ]

[The day after tomorrow, Thursday, linear algebra and analytic geometry of space, class at 2pm, one hour, in the public classroom of the West Building. ]

[Got it! ]

[Hiss~, Chuan Shen's first class, don't miss it! Where to sign up? ]

[It seems that there is no need to sign up, just like ordinary professors teaching open classes? ]

[No need to sign up? There must be a lot of people here? It seems that I have to go early the day after tomorrow to grab a seat. ]