Sadao Hirano and Motohisa Nakagawa, engineers of Japan's Harayama Magnetic Materials Co., Ltd., came to China to attend an academic conference. After the meeting, the two planned to stay in the capital for two days and visit several places of interest. On the first day of shopping, the organizer of the conference conveniently approached them, and very enthusiastically presented them with two tickets for the material exhibition, and also sent a car to send them to the door of the exhibition hall.

The behavior of the conference organizers made the two feel a little inexplicable. Thinking about it carefully, it seems that there is still some coercion, which makes them feel very unhappy. However, after they reluctantly came to the door of the pavilion, they completely forgot about the disrespect that the conference organizers had given them, because their attention was all attracted by the set of magnet fence doors arranged by Qin Hai.

As experts in the research of magnetic materials for a long time, Sadao Hirano and Motohisa Nakagawa are well aware of the current state of development of permanent magnet materials. A magnet the size of a fingernail can produce such a powerful magnetism, which is completely beyond the scope of the two of them. At that moment, Sadao Hirano even had a desire to break off the small magnet and put it in his pocket and take it away, even if he couldn't get rid of the whole magnet, just scraping some magnetic powder from it, it would have great significance to him. However, after seeing the tigerly look of the security guard next to him, he gave up this disgraceful thought, and together with Nakagawa Motohisa, he went straight to the magnetic material exhibition hall of the exhibition hall.

When they arrived at the exhibition hall, the two of them took a look and found that the person standing in the booth was actually their acquaintance, who was Sun Yuzhi, an associate professor of Beijing University of Technology. Everyone is engaged in permanent magnet materials, and Sun Yuzhi also went to Japan to attend academic conferences, and dealt with Sadao Hirano and Motohisa Nakagawa, so they knew each other. Sadao Hirano knows that Sun Yuzhi has made great achievements in the research of permanent magnet materials. If the strong magnetic material at the gate is from Sun Yuzhi, it is easy to explain.

"Hey, Sun Jun, is it really you?" Sadao Hirano squeezed to the front of the booth, pretending to be surprised, and greeted Sun Yuzhi.

Sun Yuzhi saw two Japanese. I quickly found an assistant of my own to continue to explain to the audience, and I walked out of the booth and came to the front of Sadao Hirano and Motohisa Nakagawa.

"It's Hirano-kun, and Nakagawa-kun, how did you come to China?" Sun Yuzhi greeted with a smile in Japanese.

Sun Yuzhi did not have any ill feelings towards Sadao Hirano and Motohisa Nakagawa, but had a bit of closeness between peers. However, Qin Hai greeted him in advance and wanted to use the new product he had just developed to set up a big hole for his Japanese counterparts. Sun Yuzhi naturally wanted to accept this arrangement, but because of such psychological preparation, when he saw Sadao Hirano and Nakagawa Motohisa, he couldn't help but feel a little weak.

"We are here to attend the NdFeM Materials Academic Seminar, by the way, why didn't Sun Jun attend this conference? In China, the authority on the study of neodymium iron materials is none other than Sun Jun. Sadao Hirano asked.

Sun Yuzhi smiled. "I've been busy for a while, and the organizers informed me before the meeting. I politely declined. Actually, I can't say that it's because I'm busy, mainly because I haven't been in contact with neodymium iron materials for a year......"

Speaking of this, he suddenly closed his mouth and forcibly swallowed back the words that followed, with a slightly embarrassed look on his face.

"Sun Jun is saying, you don't make neodymium iron materials anymore?" Sadao Hirano very sensitively grasped the mystery in Sun Yuzhi's words. He vaguely felt that the new magnetic materials exhibited at this exhibition may be related to Sun Yuzhi's change of research direction.

NdFeM materials belong to rare earth permanent magnet materials. Permanent magnet materials, also known as hard magnetic materials, are concepts that refer to strong magnetic materials with strong resistance to demagnetization and high residual magnetic induction intensity. Permanent magnet materials include cast permanent magnet alloys, deformable permanent magnet alloys, hard ferrites, rare earth permanent magnet alloys and bonded magnets.

Rare earth permanent magnet materials refer to permanent magnet alloys containing rare earth materials, which are the highest performance of all permanent magnet materials. It varies according to the time of generation. Rare earth permanent magnet materials can be divided into three generations. The first generation of rare earth permanent magnet materials is rare earth cobalt magnets, that is, an alloy of rare earth elements and metal cobalt; The second generation of materials is based on the first generation, with cheaper iron, copper, zinc and other materials to replace some of the more expensive rare earth elements, the formation of rare earth, iron, cobalt alloy, which is characterized by low cost and strong magnetism, the most typical representative of which is samarium cobalt alloy.

In 1983, Japan first reported the third generation of permanent magnet materials without cobalt, and its typical products are compounds formed from rare earth neodymium, iron and boron, referred to as NdFeB, and also directly called NdFeB materials.

NdFeB is much more magnetic than samarium-cobalt alloys, and because it does not contain expensive cobalt, it is relatively inexpensive, and it has quickly become a leader in permanent magnet materials. Since the early 80s, people have not invented permanent magnet materials that are more magnetic than NdFeB.

Sun Yuzhi's past research expertise was NdFeB, which was mixed with other rare earth elements, and he invented a new material with a maximum magnetic energy product of 390 kilojoules per cubic meter, surpassing the highest level reached by Japanese scholars at the same time, and thus won the respect of Japanese scholars such as Sadao Hirano. However, Sadao Hirano knew that even the properties of that new NdFeB material were far from the magnet at the gate, which meant that during this time, Sun Yuzhi must have invented a better material.

In the past 10 years, the research on higher performance permanent magnet materials has mainly focused on the doping of NdFeB materials. If Sun Yuzhi can invent a material with higher performance, and at the same time, as he himself said, he has not been in contact with neodymium iron materials for a year, it means that the formula of this new material should be a new combination of neodymium, iron, and boron, and this information is too important for people who are engaged in permanent magnet materials.

"The research of NdFeB has entered a bottleneck." Sun Yuzhi said to Sadao Hirano and Motohisa Nakagawa with some embarrassment, "I plan to try it with other rare earth elements, and maybe I can make a better discovery." ”

"Are these permanent magnet materials your new discovery?" Nakagawa Motohisa asked, pointing to the various presentation materials in the exhibition hall.

"These are just some of them." Sun Yuzhi said in a modest tone.

"Sun Jun, I think the magnetic energy product of these materials is much higher than that of NdFeB, how did you do it?" Sadao Hirano asked anxiously.

Sun Yuzhi's face was embarrassed, and he said, "Hirano-kun." It's not that I don't want to sue you, it's really ...... You don't know yet, I don't work at Jingcheng University of Technology anymore, and the institution I work for now is called Anhe Institute of Materials, which is a private research institution, so ......"

Later words. Sun Yuzhi doesn't need to say it, Sadao Hirano and Motohisa Nakagawa can naturally understand.

If Sun Yuzhi is still in Beijing University of Technology, then the most important thing to come up with a new type of material is to quickly write an article to publish, and for the peers who come to communicate, he will not keep it secret, but will reveal all the technical mysteries to the other party. At that time, there were many technologies that were lost because of this, and many of them were discovered by Chinese scholars first, but were preemptively registered by foreign companies. Institutions like Jingjing University of Technology are dismissive of things like applying for patents. They may even be proud that someone else has applied for a patent with their own technology.

Sadao Hirano's outspoken approach to Sun Yuzhi's technical details is also due to his knowledge of the habits of Chinese scholars. In his mind, as long as he complimented Sun Yuzhi a few more words, he would definitely reveal the most important technical link. If Sun Yuzhi can help Sadao Hirano pierce this window paper, then after Sadao Hirano returns to Japan, he will be able to develop the technology quickly, and he can preempt Sun Yuzhi's reaction. All patents are registered.

However, Sun Yuzhi sued Sao Hirano. He no longer works at Beijing University of Technology, and his current work unit is a private research institution. Private organizations are no better than state-owned units, and people should pay attention to economic efficiency in doing things. When a technology is developed, private institutions will definitely rush to register patents, while requiring researchers to maintain strict confidentiality. Sun Yuzhi wanted to hint to Sadao Hirano and Motohisa Nakagawa. That's such a piece of information.

"So, Sun Jun, have you applied for a patent for this technology?" Sadao Hirano asked.

Sun Yuzhi said: "I don't know the specific details, but it is said that our legal department has sent this technology to the International Patent Organization, and now it should be in the approval process." After a while. You'll be able to retrieve our application information. ”

"If we want to cooperate with your college, how should we contact us?" Sadao Hirano asked again. Since the other party has applied for a patent, there is no possibility of seizing this patent, and what he has to consider now is to retreat to the next best thing to see if he can establish a cooperative relationship with the other party, and then wait for the opportunity to seek the greatest benefits from the cooperation.

Sun Yuzhi pointed with his hand and said, "Our college has an information desk in the exhibition hall over there, you can go there to negotiate with our sales staff." ”

The Japanese that Wang Xiaochen talked about to Qin Hai were none other than Sadao Hirano and Motohisa Nakagawa. Qin Hai gave a gag order to everyone in order to play tricks, so the two of them did not get the information they hoped to know from Wang Xiaochen. However, Wang Xiaochen also left them a chance to come to Qin Hai another day to negotiate directly.

After contacting the company, Sadao Hirano decided to change his itinerary and stay in China in order to meet Qin Hai. After making an appointment a few times very urgently, Qin Hai finally agreed to meet with them. (To be continued......)

PS: Recommend Feng Shaoyu's new work "Super Extraction":

Chen Feng was just an ordinary high school student, and one day the big extraction system changed the trajectory of his life.

What is a large extraction system? It is possible to extract a qiē!

Extract knowledge! Extract Kung Fu! Extract ability!

And Chen Feng found that he could not only extract the ability of real people.

Zhang Wuji! Linghu Chong! Qiao Feng! Captain America! Iron Man! Spider-Man! ……

What's yours is mine, what's mine is mine!

Since then, Chen Feng's life has begun to become brilliant, and his awesome life does not need to be explained.

"I have to be high-profile, so that you don't envy me, worship me, and can't stop wanting me, how can I be awesome?"

- Chen Feng