The research on iron-based superconductivity presided over by Ning Ning has progressed very quickly thanks to Qin Hai's investment regardless of cost. The results have been published one after another in top international publications, making her even more famous than her mentor Chen Zong.
Then. Two months ago, when Ning Jing had a phone call with Qin Hai, he reported that a new material with a critical temperature higher than 77k had been discovered, but the preparation method was not yet mature and could not be made public for the time being. Once the preparation method of this new material is obtained
If there is a breakthrough, then the research on superconducting motors will usher in a new stage of vigorous development.
77k is the boundary of the liquid nitrogen temperature zone. The critical temperature is higher than 77k, which means that this material can produce superconducting properties using liquid nitrogen as the coolant. The cost of cooling with liquid nitrogen is very low, and in reality
It has strong operability. When room temperature superconductors have not yet come out, liquid nitrogen temperature zone superconductivity is the goal that engineers are striving for.
"For the problem of superconducting coils, we place our hopes on our younger siblings." Zhou Linlei said with a smile. Hearing that Qin Hai's girlfriend was an expert in superconducting, Zhou Linlei's evaluation of Qin Hai suddenly became much higher, regardless of his already
At the age of over 50, he actually became brothers with Qin Hai.
"In addition to the problem of coils, permanent magnet materials are also a big problem. The magnetic energy product of NdFeB, which is the most used now, is high enough. However, the Curie temperature is too low. If the temperature of the working environment is slightly higher, the magnetism will disappear.
This is still not enough for the motor we need." Zhou Linlei then raised a second question.
Qin Hai pointed at himself with a smile and said: "On this issue, Zhou Gong has to place his hope on me."
"You?" Zhou Linlei said in surprise, "Why, Xiao Qin is engaged in magnetic materials?"
"I don't have any majors and have been exposed to various materials." Qin Haidao. "However, we have now developed a new permanent magnet material, which is based on cerium. The magnetic strength is higher than that of neodymium iron boron, and
The Curie temperature can reach over 600 degrees Celsius. Does Zhou Gong think it is enough?"
"A new permanent magnet material with a Curie temperature of 600 degrees Celsius?" Zhou Linlei asked in surprise, "Why haven't I heard of it?"
"This...maybe it's because Zhou Gong is too busy with his work on weekdays and didn't pay attention to the relevant documents? It's been more than half a year since our material was released," Qin Hai said.
Zhou Linlei patted his head in annoyance and said: "Yes, yes, I have been thinking about the problem of steam catapults for more than half a year. I really haven't paid attention to the information about magnetic materials and superconducting materials. I didn't expect the development of technology.
It happened so quickly, if I had known it would happen..."
At this point, he suddenly got stuck and secretly glanced at Ji Mingchu from the corner of his eye. Ji Mingchu had been listening to their conversation and naturally noticed Zhou Linlei's little move. He chuckled and asked:
"Why, if I had known this, would you have insisted on your original idea?"
"It can only be said that there are more reasons than the original idea, but the obstacles are still very big." Zhou Linlei answered honestly.
"Why don't you tell Xiao Qin what you think? Look, you were leaving just now, and I asked you to stay, but you were still unhappy. What's the result? You don't regret staying and chatting with Xiao Qin, right?
"Ji Mingchu asked.
"How can I be unhappy..." Zhou Linlei's face turned slightly red. Just now, he really felt that staying and chatting with Qin Hai was a waste of time. He didn't expect to get such important information in just a few sentences. If he had known this,
He would not show any intention of leaving. Now that Ji Mingchu had suddenly exposed him, he was naturally quite embarrassed.
"Tell Xiao Qin what you think. Maybe your problem can be solved by Xiao Qin and the others." Ji Mingchu encouraged Zhou Linlei again.
"Hmm... Okay." Zhou Linlei hesitated for a moment, then nodded and accepted Ji Mingchu's suggestion. He turned his head to Qin Hai and said seriously: "Xiao Qin. In fact, besides the idea of steam ejection, we have another idea.
.That is electromagnetic ejection, have you ever heard of it?”
"Electromagnetic ejection?" Qin Hai smiled. "Of course I have heard of it. So, the motor you just mentioned that requires extremely high instantaneous power is used for electromagnetic ejection?"
Electromagnetic ejection is another ejection method besides steam ejection. Its principle is to use electromagnetic power to eject aircraft from the aircraft carrier. Compared with steam ejection, the device structure used by electromagnetic ejection is simpler and does not require complicated laying.
There is no need to consider the storage and leakage of high-temperature and high-pressure steam. In addition, the power of electromagnetic ejection is determined by the size of the current, so it is more controllable than steam ejection and is a more promising aircraft ejection method.
.
However, the technical problems faced by electromagnetic catapults are much more complex than steam catapults. First of all, it is necessary to accelerate an aircraft weighing dozens of tons from a static state to take-off speed in a few seconds, which requires the power of the motor.
Extremely high. Zhou Linlei just mentioned to Qin Hai that a motor with very high instantaneous power is needed, which refers to the motor used to drive the catapult. The two major bottlenecks in developing such a motor are the coils that can support high power and the ability to
Strong magnets that work at high temperatures.
In addition to the motor, the power supply device is also a big problem. If the catapult works on land, it can naturally be connected to a line of 100,000 kilovolts or higher to provide powerful power in a very short time.
.However, it is very difficult to find such high-power power supply equipment on an aircraft carrier. Even if it is a nuclear-powered aircraft carrier, its generator cannot provide such high instantaneous power.
There is only one kind of equipment that can perform high-power discharge in an instant, and that is a supercapacitor. This kind of capacitor with a capacity of several thousand farads can store a large amount of electricity and release it in a very short time. It is similar to what people use every day.
Compared with rechargeable batteries, supercapacitors have several advantages: first, they have stronger power storage capacity, and a supercapacitor of the same weight can store dozens of times more electricity than rechargeable batteries; second, they can support hundreds of thousands of repeated charges and discharges.
, while ordinary rechargeable batteries are already scrapped after one or two thousand times of charging and discharging; the third point, and the most important point, is that the charging time and discharging time are very short, which is exactly what the electromagnetic catapult needs most.
As a motor expert, Zhou Linlei was assigned to engage in the research of aircraft carrier catapults because the military's original idea was to use electromagnetic catapults. However, after a full inspection of the existing technical reserves, Zhou Linlei had to regretfully give up this idea.
He came up with the idea and began to preside over the design of the steam ejection device. Ji Mingchu knew that Zhou Linlei had always been obsessed with electromagnetic ejection. Taking this opportunity today, he asked Zhou Linlei to push this problem to Qin Hai.
"Supercapacitors, superconductors, and permanent magnet materials are the biggest problems we face in developing electromagnetic ejection devices." Zhou Linlei introduced to Qin Hai, "By the way, there are also high-power semiconductor components, especially high-voltage and high-power-density IGBTs.
Chips, this is also a technology monopolized by Western countries and prohibited from being sold to our country."
"Sure enough, every item is a world-class problem." Qin Hai sighed. The full name of the IGBT chip Zhou Linlei mentioned last is called "insulated gate bipolar transistor". It is a semiconductor component for power management in high-power circuits.
It is also a blank technology in China.
"I heard from Xiao Qin today that our country's superconducting research has made breakthrough progress, and permanent magnet materials have also made major breakthroughs. This has solved two of our problems at once, which is really not easy." Zhou Linleile said.
Hehe said, "At this rate, maybe within 20 years, we will really be able to overcome the difficulties of electromagnetic ejection."
"Twenty years..." Qin Hai clicked his tongue, "Gong Zhou, are you kidding?"
"I really have this confidence." Zhou Linlei said seriously.
"Uh... I mean, it actually takes 20 years?" Qin Hai couldn't laugh or cry. Zhou Linlei obviously misunderstood what he meant, thinking that he thought 20 years was not enough time to solve these problems. In fact, what Qin Hai said to Zhou Linlei
We all have some understanding of these technologies, and we know that with enough capital investment and the right research ideas, it will only take five to ten years at most to solve all these problems.
"Xiao Qin, don't underestimate these technical problems. Several research institutes in the Ministry of Electronics are engaged in research on supercapacitors, and so far no satisfactory progress has been made. As for igbt, it is even more difficult...
" Zhou Linlei explained.
Ji Mingchu interrupted Zhou Linlei. He looked at Qin Hai and asked: "Xiao Qin, you said it doesn't take 20 years. How many years do you think it will take?"
Qin Hai had a wry smile on his face and said, "If I said it was 19 years, would Mr. Ji slap me on the ear?"
"Of course I can slap you!" Ji Mingchu threatened with a smile, "I know you, Xiao Qin, have potential. When it comes to national defense construction, you are absolutely not allowed to lurk."
"At most..." Qin Hai calculated in his mind and was about to say a 10-year time period. As he spoke, he suddenly saw Ji Mingchu's head full of white hair. With a thought in his mind, he blurted out: "Five years!"
"Five years!" Zhou Linlei stood up from the sofa, approached Qin Hai, stared at him, and asked: "You mean five years?"
"Yes, five years." Qin Hai gritted his teeth and agreed.
The two technologies of supercapacitor and igbt were still elusive for China at that time. But after entering the 21st century, with the spring breeze of the development of high-speed rail technology, Chinese scientific and technological personnel only took five years to realize
It has achieved a breakthrough and reached the world's advanced level. Qin Hai understands some key elements of these two technologies. He believes that if Daqin Group can invest enough funds, it will take five years to develop these two technologies.
Technology is entirely possible.
Of course, if he could be given more time, he might be able to save a lot on capital investment. But, can he wait? Can he wait until he is old? (To be continued)