Material Empire

Engineers Sadao Hirano and Motohisa Nakagawa from Haruyama Magnetic Materials Co., Ltd. of Japan 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. Just after the first day of shopping, the organizer of the conference found them conveniently, and very enthusiastically gave them two tickets to the materials exhibition, and sent them a car to take them outside the gate of the exhibition hall.

The actions of the organizers of the meeting made the two feel a little inexplicable. Thinking about it carefully, it seemed that there was a sense of coercion to some extent, which made them feel very unhappy. However, after they reluctantly came to the gate of the exhibition hall, they completely forgot the disrespect towards them by the organizer of the meeting, because their attention was all attracted to the set of magnet fence doors arranged by Qin Hai. up.

As experts who have been engaged in the research of magnetic materials for a long time, Sadao Hirano and Motohisa Nakagawa are very aware of the development status of permanent magnetic materials today. A magnet the size of a fingernail can produce such a strong magnetism, which is completely beyond the scope of the two people's cognition. At that moment, Sadao Hirano even had a desire to break off the small magnet and put it in his pocket to take away. Even if he couldn't get rid of the whole magnet, just scraped some magnetic powder off it, for him It also has great significance. However, after seeing the covetous expression of the security guard next to him, he gave up this dishonorable idea, and went straight to the magnetic material exhibition hall of the exhibition hall together with Nakagawa Motohisa.

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

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

Seeing the two Japanese, Sun Yuzhi hurriedly found an assistant to continue explaining to the audience, while he walked around the booth and came in front of Sadao Hirano and Motohisa Nakagawa.

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

Towards Sadao Hirano and Motohisa Nakagawa, Sun Yuzhi didn't have any ill feeling towards them, on the contrary, he felt a bit of closeness among colleagues. However, Qin Hai had greeted him in advance, and wanted to use the new product he had just developed to set a big hole for his Japanese counterparts. Sun Yuzhi naturally wanted to accept this arrangement, but because of such psychological preparation, when he saw Hirano When Sadao was with Nakagawa Motohisa, he couldn't help feeling a little guilty.

We are here to participate in the Nd-Fe material academic seminar. By the way, why didn't Sun Jun attend this conference? In China, Sun Jun is the authority in the study of Nd-Fe materials. Hirano Sadao asked.

Sun Yuzhi smiled and said: I've been busy for a while, and the organizer also notified me before the meeting, but I declined. In fact, I can't say it's because I'm busy. The main reason is that I haven't touched NdFe for a year. material...

Having said that, he suddenly shut his mouth and swallowed the rest of the words forcefully, with a bit of embarrassment on his face.

Sun Jun said, you don't make neodymium-iron materials anymore? Sadao Hirano grasped the mystery in Sun Yuzhi's words very sensitively. He faintly felt that the new magnetic materials exhibited at this exhibition might be different from Sun Yuzhi's. related to the research direction.

Neodymium iron material belongs to rare earth permanent magnet material. Permanent magnetic materials are also called hard magnetic materials. The concept refers to strong magnetic materials with strong anti-demagnetization ability and high residual magnetic induction. 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 have the highest performance among all permanent magnet materials. According to the different generation time, rare earth permanent magnet materials can be divided into three generations. The first-generation rare-earth permanent magnet material is a rare-earth cobalt magnet, that is, an alloy of rare-earth elements and metal cobalt; the second-generation material is based on the first-generation material, replacing part of the price with cheaper iron, copper, zinc and other materials More expensive rare earth elements form alloys of rare earth, iron, and cobalt, which are characterized by low cost and strong magnetism, and the most typical representative is samarium-cobalt alloy.

In 1983, Japan first reported the third-generation permanent magnet material that does not contain cobalt. Its typical product is a compound formed by rare earth neodymium, iron and boron, which is called NdFeB for short, or directly called NdFeB.

The magnetism of NdFeB is much higher than that of samarium cobalt alloy, and because it does not contain expensive cobalt, the cost is relatively low, and it has quickly become the leader in permanent magnet materials. Since the early 1980s, no permanent magnet material stronger than NdFeB has been invented.

Sun Yuzhi's research expertise in the past was NdFeB. By doping NdFeB with other rare earth elements, he invented a new material with a maximum magnetic energy product of 390 kJ per cubic meter, exceeding the highest level achieved by Japanese scholars in the same period. Because of this, he won the respect of Japanese scholars such as Sadao Hirano. However, Sadao Hirano knew that even the performance of the new NdFeB material was far from that of the magnet at the gate. That is to say, during this period of time, Sun Yuzhi must have invented something more good 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 materials with higher performance, and at the same time, as he himself said, he has not been exposed to neodymium-iron materials for a year, it means that the formula of this new material should be a formula other than neodymium, iron, and boron. A new combination, this information is really important for those who engage in permanent magnetic materials.

The research on NdFeB has entered the bottleneck. Sun Yuzhi said to Hirano Sadao and Nakagawa Motohisa with some embarrassment, I plan to try with other rare earth elements, and maybe I can make better discoveries.

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

These are only part of it. Sun Yuzhi spoke arrogantly in a humble 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 looked distressed, and said: Mr. Hirano, it's not that I don't want to tell you, it's really...you don't know, I don't work at the Capital University of Technology now, and the institution I'm working for is called Anhe Materials College, which is a private research institute, so...

Sun Yuzhi didn't need to say what happened next, as Sadao Hirano and Motohisa Nakagawa could understand it.

If Sun Yuzhi is still at the Capital University of Technology, then the most important thing to come up with a new type of material is to write an article and publish it quickly. For colleagues who come to communicate, he will not keep it secret, but will keep all The secrets of technology were revealed to the other party. There were not a few technologies that were lost because of this. Many technologies were first discovered by Chinese scholars, but were patented by foreign companies. Institutions like Jingcheng University of Technology are dismissive of things like applying for patents, and they may even be proud that others have applied for patents with their own technology.

Sadao Hirano asked Sun Yuzhi for technical details so bluntly because he knew 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 links. Technology is often just a layer of window paper. If Sun Yuzhi can help Hirano Sadao break through this window paper, then Hirano Sadao can quickly develop the technology after returning to Japan, and he can react before Sun Yuzhi Before, all patents were registered.

However, Sun Yuzhi told Sadao Hirano that he no longer worked at the Capital University of Technology, and that his current work unit was a private research institution. Private institutions are no better than state-owned units. They must pay attention to economic benefits in doing things. Once a technology is developed, private organizations will definitely rush to register a patent, and at the same time require researchers to keep it strictly confidential. It was such a message that Sun Yuzhi wanted to hint to Hirano Sadao and Nakagawa Motohisa.

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

Sun Yuzhi said: I don't know the specific details, but it is said that our legal department has submitted this technology to the International Patent Organization, and it should be in the review period now. After a while, you will be able to retrieve our application information gone.

If our Chunshan Company wants to cooperate with your academy, how should we contact you? Sadao Hirano asked again. Now that the other party has applied for a patent, there is no possibility of seizing this patent. What he has to consider now is to settle for the next best thing, see if he can establish a cooperative relationship with the other party, and then wait for the opportunity to seek the greatest benefit from the cooperation. Benefit.

Sun Yuzhi pointed with his finger 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 mentioned to Qin Hai were Sadao Hirano and Motohisa Nakagawa. In order to play tricks, Qin Hai issued a gag order to everyone, so the two of them did not get the information they wanted to know from Wang Xiaochen. However, Wang Xiaochen also left an opportunity for them to come to Qin Hai to negotiate directly another day.

After contacting the company, Sadao Hirano decided to temporarily change his itinerary and stay in China in order to meet Qin Hai face to face. After several urgent appointments, Qin Hai finally agreed to meet them.

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