Chapter 460: Permanent magnet material

() Engineers Haruo Hirano and Nakagawa Motohisa, engineers of Chunshan Magnetic Materials Co., Ltd., came to China to attend an academic conference. After the meeting, the two plan to stay in Beijing for two days and visit some places of interest. Just after the first day of shopping, the organizers of the conference made it easy to find them. They were very enthusiastic and gave them two tickets to the material exhibition. They also sent a car to take them outside the exhibition hall.
The actions of the organizers of the conference made them feel inexplicable. If you think about it, it seems that it is somewhat coercive, which makes them unhappy. However, after they reluctantly came to the exhibition hall door, they completely forgot the disrespect of the conference organizers, because their attention was all attracted by the set of magnet fence doors arranged by Qin Hai. Already.
As experts in magnetic materials research for a long time, Hirano Masao and Nakagawa Motohisa are very aware of the current state of development of permanent magnetic materials. A fingernail-sized magnet can produce such a strong magnetism, which is completely beyond the scope of the two people's perception. At that moment, Hirano Zhenfu even sprouted a kind of small magnet to be carried down in his pocket and taken away. Even if he could not remove the entire magnet, he just scraped some magnetic powder from it, which was also for him. Great significance. However, after seeing the staring expression of the security guard next to him, he gave up this disgraceful idea and went straight to the magnetic material exhibition hall of the exhibition hall with Nakagawa Motohisa.
When they arrived at the exhibition hall, the two of them took a closer look and found that it was their acquaintances who were presenting to the audience while standing in the exhibition booth, and that was Sun Yuzhi, an associate professor at the Beijing University of Technology. Everyone is engaged in permanent magnet materials. Sun Yuzhi also went to Japan to participate in academic conferences and dealt with Hirano Sadao and Nakagawa Motohisa, so they knew each other. Hirano Masao knew that Sun Yuzhi was very successful in the research of permanent magnet materials. If the ferromagnetic material at the gate was made by Sun Yuzhi, it would be a good explanation.
"Hi, Sun Jun, is it really you?" Hirano Masao huddled in front of the booth, pretending to be surprised, and greeted Sun Yuzhi.
Sun Yuzhi saw two Japanese. I quickly found an assistant to continue to explain to the audience, but I walked out of the booth and came to the front of Hirano Sadao and Nakagawa Motohisa.
"It's Hirano, and Nakagawa, how did you come to China?" Sun Yuzhi greeted in Japanese with a smile.
To Hirano Sadao and Nakagawa Motohisa, Sun Yuzhi didn't have any bad feelings, but had a sense of closeness among colleagues. However, Qin Hai greeted him in advance, and wanted to set up a big pit for his Japanese counterparts with the new products he just developed. Sun Yuzhi naturally accepted this arrangement, but because of this psychological preparation, he couldn't help feeling guilty when he saw Hirano Masao and Nakagawa Motohisa.
"We are here to attend an academic seminar on neodymium and iron materials. By the way, why did Sun Jun not attend this conference? In China, Sun Jun is the authority on researching neodymium materials." Hirano asked.
Sun Yuzhi smiled. Said: "I've been busy for a while, and the organizer also notified me before the meeting. I declined it. In fact, I can't say it's because I'm busy, mainly because I haven't touched neodymium for a year ...
Having said that, he suddenly closed his mouth, forcibly swallowed the words behind him, and his face was a little awkward.
"Sun Jun is saying, you don't make neodymium material anymore?" Hirano Masao was very sensitive to grasp the mystery in Sun Yuzhi's words. He faintly felt that the new magnetic materials displayed at this exhibition may be related to Sun Yuzhi's change of research direction.
NdFe material is a rare earth permanent magnet material. Permanent magnet materials are also called hard magnetic materials, and their concept refers to ferromagnetic materials with strong resistance to demagnetization 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 is the highest performance of all permanent magnet materials. Depending on the time of production. Rare earth permanent magnet materials can be divided into three generations. The first generation of rare earth permanent magnet materials is a rare earth cobalt magnet, that is, an alloy of rare earth elements and metallic cobalt; the second generation of materials is based on the first generation and replaced part of the price with cheaper iron, copper, zinc and other materials The more expensive rare earth elements form alloys of rare earth, iron, and cobalt, which are characterized by low cost and strong magnetic properties. The most typical representative is samarium-cobalt alloy.
In 1983, Japan first reported the third generation of permanent magnet materials that do not contain cobalt. Its typical product is a compound formed of rare earth neodymium, iron, and boron, referred to as neodymium-iron-boron.
Nd-Fe-B has far higher magnetic properties than samarium-cobalt alloys, and because it does not contain expensive cobalt, its cost is relatively low, and it has quickly become a leader in permanent magnet materials. Since the early 1980s, people have not invented permanent magnetic materials with stronger magnetic properties than NdFeB.
Sun Yuzhi's past research expertise is neodymium iron boron. By incorporating other rare earth elements in neodymium iron boron, he has invented a new material with a maximum magnetic energy product of 390 kilojoules per cubic meter, exceeding the highest level reached by Japanese scholars in the same period. As a result, it has won the respect of Japanese scholars such as Hirano Masao. However, Hirano Masao knew that even the new type of neodymium-iron-boron material had far better performance than that of the magnet at the gate. In other words, during this time, Sun Yuzhi must have invented more Good material.
In the past 10 years, the research of higher performance permanent magnet materials has mainly focused on doping treatment of NdFeB materials. If Sun Yuzhi can invent higher-performance materials and, as he himself said, he has not been exposed to neodymium-iron materials for one year, it means that the formula of this new material should be one other than neodymium, iron, and boron. This new combination, this information is really too important for those who engage in permanent magnet materials.
"The research on neodymium-iron-boron has entered a bottleneck," Sun Yuzhi said with a little embarrassment to Masao Hirano and Motohisa Nakagawa. "I plan to try it with other rare earth elements, and maybe I can find better."
"Are these new 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 said in a humble tone, arrogant.
"Sun Jun, I think the magnetic energy product of these materials is much higher than neodymium iron boron. How did you do that?" Hirano asked anxiously.
Sun Yuzhi was embarrassed and said, "Hirano Jun. I don't want to tell you, it really is ... you don't know yet, I am no longer working at the Beijing University of Technology. The institution I am serving is called Anhe Material College. It is a private enterprise. Research institute, so ... "
Later words. Sun Yuzhi doesn't need to say it anymore, Hirano Sadao and Nakagawa Motohisa can naturally understand.
If Sun Yuzhi is still at Jingcheng 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. For colleagues who come to communicate, he will not keep secrets, but will keep all The technical mystery is presented to the other side. The technology that was lost because of doing so was not a few. 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 patent applications. They may even be proud that others have patented their own technology.
Hirano Masao bluntly understood the technical details from Sun Yuzhi because he knew the habits of Chinese scholars. When he wanted to come, as long as he complimented Sun Yuzhi, he would definitely reveal the most important technical links. Technology is often just a layer of window paper. If Sun Yuzhi can help Hirano Masao to break through this kind of window paper, then Hirano Masao can quickly develop the technology after returning to Japan, and he can grab Sun Yuzhi's response prior to. Register all patents.
However, Sun Yuzhi told Hirano. He no longer works at Jingcheng University of Technology. His current work unit is a private research institution. Private institutions are no better than state-owned units. People must pay attention to economic benefits when doing things. A technology has been developed, and private institutions will certainly rush to register patents, while requiring researchers to keep them strictly confidential. Sun Yuzhi wanted to hint to Hirano Masao and Nakagawa Motohisa. It's such a message.
"So, Sun Jun, have you applied for a patent for this technology?" Asked Hirano Masao.
Sun Yuzhi said: "I don't know the specific details, but it is said that our legal department has already sent this technology to the International Patent Organization. It should be during the examination and approval period. After a while, you will be able to retrieve our application information. Now. "
"If we want to cooperate with your college, how should we contact?" Since the other party has already applied for a patent, the possibility of seizing this patent is no longer available. What he has to consider now is to take the second step and see if he can establish a cooperative relationship with the other party, and then wait for the opportunity to seek the greatest from cooperation interest.
Sun Yuzhi pointed with one hand and said, "Our college has an information desk in the exhibition hall over there. You can go there and talk with our sales staff."
The Japanese that Wang Xiaochen talked to Qin Hai were Hirano Sadao and Nakagawa Motohisa. Qin Hai wrote a password to everyone for the sake of mystery, so the two did not get the information they wanted to know from Wang Xiaochen. However, Wang Xiaochen also left them an opportunity for them to come to Qin Hai and negotiate directly.
After Hirano had contacted the company, he decided to temporarily change his schedule and stay in China to meet Qin Hai. After several very urgent appointments, Qin Hai finally agreed to meet them. (To be continued, the novel is better updated faster!
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