Genius remembers in a second [Aishang Novel Network biquge.info] to provide you with wonderful novels to read.

Although the time is seven or eight years in advance, the location of the real yàn reagent storage room on the second floor is no different from Liang Yuan's memory.

Looking at the dark red door in front of him that seemed to have not changed for a century, Liang Yuan let out a long breath, alleviating the absurd entanglement of both familiar and unfamiliar caused by the deviation of time and space.

Pushing open the door of the reagent storage room, the unique bitter taste of the chemical laboratory came to my face.

Rows of tall white shelves filled the room, and glass bottles of various sizes were arranged in order on the shelves, containing colorful chemical reagents.

"Oh, there are so many bottles, how do you choose this? Ning Wanfei casually closed the door of the storage room.

"I knew that the front of the coin had gone to the physical room, and the materials here looked like powder, so do we still have to fiddle with that troublesome hot rolling equipment," Ning Wanjia said distressedly.

"Take it casually, let's pick one by three, and then touch two bottles casually with our eyes closed. Liang Yuan said with a smile.

"Okay, I'll see if there's anything like metal. Ning Wanfei said as she went to the east shelf.

Liang Yuan recalled the memories of his previous life at Dongda, and walked to the southwest corner of the room, where in Liang Yuan's memory, was where Dongda placed inorganic material reagents.

Ning Wanjia also followed Liang Yuan's side, and turned to the right side of the room step by step.

Silver nitrate, sodium chloride, potassium carbonate, litmus, phenolic, various pH test papers, acid-base indicators...... Liang Yuan looked at the many familiar items in his previous life on the shelves, and a sense of intimacy arose.

Do you want to choose your old profession when you choose a major next year, if you choose a chemical engineering major, you will probably break the glasses of countless people, Liang Yuan thought with some anticipation.

"Xiaoyuan, there are a lot of materials, what do we choose?"

There was no one around, and the girl quietly hugged Liang Yuan's waist from behind.

"Don't choose the liquid one, we haven't figured out how to measure the liquid material after it freezes at low temperature. It's better to find a solid or powdery material. Liang Yuan said slowly.

After browsing through about two-thirds of the reagents, Liang Yuan finally found what he needed on the last shelf in the corner of the room.

Next to a large bottle of white sodium hydroxide granules, the dirty-looking gray-black magnesium diboride powder is quietly contained in a wide-mouth glass bottle with a lid.

God opened his eyes, Liang Yuan thought excitedly, Dongda really stocked this thing as a commonly used reagent, otherwise he really didn't know, how to make this thing clear without revealing a trace.

At this time, magnesium diboride was used by humans as a special chemical agent, a fireworks additive, and an additive to improve the combustion efficiency of rockets. People are completely unaware that this simple and inexpensive compound has excellent conductivity.

Liang Yuan's professors of the Department of Chemistry at Tokyo University often received national-level rocket propellant research projects, and it is precisely in this way that magnesium diboride, a relatively rare artificial compound in the 2O century, can become one of the standing items in the University of Tokyo.

Magnesium diboride crystals belong to the hexagonal crystal system, and scientists have been able to synthesize magnesium diboride in the real yàn room as early as 195o. However, its directivity has never been studied.

Liang Yuan's current magnesium diboride conductivity in his previous life was Jun Nagamatsu, a fourth-year student at Aoyama Gakuin University in Japan.

In March 2ooo, the graduating college student accepted a practical assignment from his supervisor, Aki Mitsu Chun, to test the electrical conductivity of magnesium diboride.

After Nagamatsu Chun made 165 samples of magnesium diboride, he applied the conductivity of magnesium diboride under various conditions one by one, and as a result, the conductive characteristics of magnesium diboride were accidentally excavated.

After the results were announced to the world by the team of Qiu Guangchun, the global scientific community set off a research boom that was no less than the first current research on high-temperature conductors in the 80s, in just one year. Papers on magnesium diboride have gone from tens of figures a year to tens of thousands.

After more than a year of research, humans have a preliminary understanding of the conductivity of magnesium diboride.

The conduction temperature of pure magnesium diboride crystals reaches 39K, which is much lower than the transition temperature of more than 77K for yttrium-barium copper-oxygen series compounds that appeared in the 80s, and only liquid hydrogen or liquid neon, which is more expensive than liquid nitrogen, can be used as a coolant to maintain the conductive state.

Of course, compared with the niobium series of conductive materials that used expensive liquid helium as a coolant in the 80s, the coolant of magnesium diboride can be said to be quite cheap.

From the perspective of transition temperature, magnesium diboride has no advantages, but in addition to the fact that the transition temperature is lower than that of high-temperature conductive materials. Magnesium diboride has an incomparably huge advantage in terms of industrial practicability.

From the perspective of cost, the raw material price of magnesium diboride is low, whether it is magnesium or boron, compared with the scarce reserves of yttrium, barium, niobium and other rare elements on the earth, it can be said that it is almost infinite.

In terms of processing, although magnesium diboride is also a substance similar to ceramics, magnesium diboride powder is different from the discrete type of yttrium-barium copper oxide that is extremely strong and difficult to process. Magnesium diboride powders have good molecular firmness and are very easy to process into wires or films.

What's more, magnesium diboride crystals can be cold-rolled out of wire rods with excellent performance directly under normal pressure and room temperature after micro-fine grinding.

Compared with yttrium-barium copper oxygen conduction series high-temperature conductors, the high pressure, high temperature environment, and magnesium diboride required for processing are directly reduced by an order of magnitude in terms of processing cost and technical difficulty.

After magnesium diboride conduction research is getting better. Almost all major research institutions in the world have come to a similar conclusion, compared with more than ten years of research at that time, the mature yttrium-barium-copper-oxygen series wire, the cost of magnesium diboride wire is less than one-third.

Magnesium diboride conductors replace yttrium-barium-copper-oxygen high-temperature conductors and traditional niobium series conductors, and the biggest realistic trend is that since around 2oo5, Xu Xiaoxing (Note 1), a scientist from the Republic of China studying in the United States, broke through the technical difficulties of industrializing and mass-producing magnesium diboride films, and the United States, Japan and other traditional leading powers have opened up the preparation technology of yttrium-barium-copper-oxygen high-temperature conductors and niobium series conductors, which were originally strictly prohibited from export, to the Republic overnight.

In the private and state-owned enterprises of the Republic of China, a new wave of mass introduction of wire manufacturing technology was set off.

Before Liang Yuan was thrown into this world, in the United States around 2O1O, with the increasing maturity of magnesium diboride wires, manufacturers who support magnesium diboride and support yttrium-barium-copper-oxygen high-temperature conductors and niobium series conductors are fighting happily.

Although the traditional industrial consortiums of the United States, Japan, and Europe have invested hundreds of billions of dollars in research and development funds for yttrium-barium-copper-oxygen high-temperature conductors and niobium series conductors in the past ten years, they have just perfected and optimized the batch industrial manufacturing of the two. However, in the face of the great competitive advantage of magnesium diboride wire, the traditional wire rod is still failing step by step.

Before and after Liang Yuan was about to cross, the world's large-scale use of wire rods, the main manufacturers of high-end medical equipment MRI imagers, the United States GE, the Netherlands Philips, and Germany Siemens6 continued to launch a new generation of MRI imager samples based on magnesium diboride lead coils.

In the military industry, the guide devices made of magnesium diboride film have been installed on a column of military equipment such as American Tomahawk cruise missiles, standard air defense series missiles, F18 fighter radars, and F16 fighter radars as early as around 2oo5.

Liang Yuan was able to learn about these magnesium diboride conductive materials after Dr. Xu Xiaoxing was hired as a visiting professor at Peking University. When he gave a speech at the University of Tokyo, he was forcibly dragged to hear it by Cai Xiaobing, who was fooling around in the sea of scientific research at that time.

Liang Yuan insisted on incorporating the maglev project into the overall planning of the group, and the big bug of magnesium diboride was the most important main reason.

The hardware platform built by excellent wires and high-performance industrial chips, after matching with appropriate operating systems and analysis software, is the core system of the crown of the medical device field in the future - the core system of the magnetic resonance imager.

In the military industry, the performance gap between electronic devices that use conductive devices and electronic devices that do not use conductive devices is not double or double the relationship. It is often an order of magnitude difference of five to ten times.

The Yutu lunar rover, which is similar to the lunar landing of the Republic of the New Century, would not be able to complete long-distance remote control commands in the face of the distant distance between the Earth and the Moon if it did not use the communication guide device.

It can be said that at the same power, it is basically impossible for electronic devices with non-conducting devices to interfere with electronic devices containing conductive devices.

Conductive technology has a revolutionary driving force for industries such as electric power, energy, transportation, military industry, medical care, communications, and semiconductors.

Liang Yuan got this level of big killer out more than ten years in advance, whether it was choosing technology trading or pulling the party-state to study quietly. For Yuanjia at this time, it is a strategic hole card.

Of course, in the face of this kind of big pit with great interests, it is also full of right and wrong. That is, the two girls accompanied Liang Yuan, otherwise they would not dare to play this kind of dance on the tip of the knife with the courage of Liang Yuanyang.

Looking at the black bottle in front of him, Liang Yuan, who knew that he had done a great job, couldn't bear the excitement in his heart, and took the slender waist of the girl behind him with his hand, and hugged Ning Wanjia in his arms.

The dark fragrance on the girl's body mixed with the unique bitter taste of chemical reagents turned into an extremely specific bitter breath and rushed into the nasal cavity, and Liang Yuan's heart rate, which was originally pounding because of excitement, became faster.

Listening to the heavy breathing of the young man who was his childhood sweetheart, he felt the hot air between Liang Yuan's mouth and nose spraying on his collarbone. An indescribable heat rose from all over her body, and Ning Wanjia felt that she had no more strength.

"Xiaoyuan, everyone is going to be out of breath. The girl's voice was soft and light, straight to the bottom of Liang Yuan's heart.

The red face in his arms was circulating, the water vapor in his eyes was rich and dripping, the pink lips were shining with a delicate shimmer, and the dark fragrance of the large clumps filled the space in the corner with the girl's more and more rapid breathing.

Do you want to kiss it? Liang Yuan thought about it tangledly, Ning Wanjiabei's teeth were slightly exposed, and her half-open cherry lips were like peach blossoms that had just been spitted, looking very sweet and sweet.

"Xiaoyuan. Did you two find it, I've already found two materials. Ning Wanfei's angry voice broke the ambiguity between Liang Yuan and Ning Wanjia.

"I chose it right away. Liang Yuan suddenly felt that his bitter gall had moved to his tongue.

Ning Wanjia's eyes cleared in her arms, looked at Liang Yuan's facial features held together, first gave Liang Yuan a charming smile, and then wrapped her arms around Liang Yuan's neck and gently kissed the corners of Liang Yuan's mouth.

"Xiaoyuan, let's take these two, it's just black and white. Ning Wanjia pointed to the two glass bottles containing sodium hydroxide and magnesium diboride reagent in front of the two of them.

Obviously, Ning Wanjia just remembered the joke of the black-faced black spear little overlord.

"Jiajia is so dark. Liang Yuan said shamelessly.

The slandered girl didn't speak, gently pulled up the cuffs of her T-shirt, and a white little arm was exposed, pulling someone's arm, side by side, and then looking at Liang Yuan with a smile.

Liang Yuan withdrew his arm with a smile, picked up two glass bottles, one black and one white, and put them into his tool kit, and then said openly: "I am a protective color in winter, dark colors are easy to absorb solar radiation, and it is beneficial to keep warm in winter, which is very in line with the evolutionary logic of biology." ”

"Pig's head, then we're in the summer. Ning Wanjiajiao smiled and pinched Liang Yuan's ears and dragged someone towards the door.

ps: Note 1: The realistic reference is Xi Xiaoxing, and interested book friends can search for the information of this scholar.