In 1978, I was admitted to Harbin Institute of Technology

Chapter 94: The students in the experimental class who are about to disappear: A window is opened, and the vast world appears
"My dear granddaughter, go back quickly. It's cold outside. Don't catch a cold! Grandpa Li will stew a chicken for you. Chicken stewed with mushrooms is delicious~"

Li Rui showed a defiant smile to the stunned Xie Wei, humming "My home is on the Songhua River in Northeast China~"

Carrying the chicken, he walked towards the kitchen.

Li Rui is not much older than the old Du couple.

The other couple adopted a daughter as their goddaughter, and he adopted Xie Rou as his granddaughter.

Clearly taking advantage!
"You're back! What are you doing standing outside? Come inside quickly, or you'll catch a cold. Xie Wei, you're back just in time. The problem with the coating process for the rice cooker liner has been solved."

Just as Xie Wei was wondering how Li Rui was taking advantage of Du Guowang and his wife, Du Guowang's voice was heard behind him.

"nailed it?"

Finally, I heard good news.

He also didn't care about Li Rui taking advantage of Du Guowang.

I am less than 22 years old, and Li Rui is in his early sixties. Although he is only a little over ten years older than my father, given my father and mother's personalities, they would definitely not mind Xie Rou recognizing the president of a key university as her grandfather.

"Yes. The chemical laboratory provided soluble polytetrafluoroethylene, and the precision workshop adopted the spraying method. The surface is uniform and fully meets the design requirements..."

Du Guowang pulled Xie Wei towards the kitchen while explaining the situation to Xie Wei.

"Don't you want to go to the kang? The kitchen is so cold!"

Xie Wei was surprised.

If you want to talk about something, according to Northeast customs, you should go to the kang.

Besides, the room with a kang is definitely warmer than the kitchen.

"What kang should we go to? Old Du has been sent to sleep in the side room. Now Xie Rou and Teacher Liang are sleeping on the kang..."

As soon as he walked to the kitchen door, Principal Li, who was lighting the coal stove to boil water, looked at Du Guowang with disdain.

"!!!"

Xie Wei stared at Du Guowang blankly.

Because of Xie Rou, Lao Du was kicked off the bed by his wife?
"It's better than you. If you're kicked out in the middle of the night, don't come to my house! Oh, and don't share a bed with me tonight!"

Du Guowang immediately fought back, and explained to Xie Wei with a smile, "Teacher Liang complained that my snoring disturbed Xie Rou and made her rest poorly. She and Xie Rou slept on the kang, and I slept in the side room. I was just about to find someone to make the kang when I was free."

Xie Wei didn't know how to respond to this.

Is it really because of the snoring?

Once Xie Rou falls asleep, she won't wake up even if there's thunder in her ears.

Liang Hongling had slept with Du Guowang for decades and never disliked his snoring. But Xie Rou, who slept on the kang, did dislike it.

avoid arousing suspicion!

Xie Rou is considered a grown-up girl, although she still hasn't had her period.

In rural Northeast China, it is common for a whole family to squeeze into one kang in winter.

Du Guowang and Liang Hongling are both senior intellectuals, so naturally they are unwilling to do so.

However, thinking about what Du Guowang had just said to Li Rui not to share a bed with him tonight, he looked at Du Guowang in surprise.

"What's that look in your eyes, kid? Haven't you seen a Northeastern man being driven out by an old woman?"

Xie Wei's eyes let Li Rui know what he was thinking, and he said it nonchalantly.

"I've heard of it, but I haven't seen it."

Xie Wei answered honestly.

He used to know that Northeastern women are tough.

However, the Northeastern people he knew were all more affectionate than anyone else in public, which made Xie Wei think that what was said on the Internet was just a rumor.

Even though he knew that the only domestic violence shelter for men in the country was established in Northeast China, he still didn't believe it.

So it’s true.

You shouldn't mess with the young girls and wives from Northeast China, so be careful when dating them in the future.

"Don't talk nonsense, that's your old woman who is tough!"

Du Guowang thought that Mo Lingyu seemed to be from Northeast China, and glared at Li Rui.

Li Rui smiled awkwardly, changed the subject, and asked Du Guowang: "Didn't I ask you to bring back the rice cooker? You said that the metalworking workshop uses spraying technology, and the inner pot coating problem has been solved. It's just right to test it. Cooking rice with a rice cooker is much easier."

"Don't mention it! As soon as I arrived at the school gate, Kang Yi stopped me and took it back. He said that students in the chemistry lab messed around and no physical and chemical analysis was done. It might be poisonous."

Du Guowang said helplessly, "I was thinking that I would only be able to eat corn porridge when I get home tonight!"

Xie Wei was a little confused: A new coating has been developed, is it toxic?

What Zhang Jingyan and Tang Long produced was probably not aluminum trifluoride (AlF3), but copper fluoride (CuF2).

What are these two guys thinking?

Instead of doing the simple things, why do you do the complicated things?

It shouldn't be.

Aluminum hydroxide is reacted with hydrofluoric acid, heated, and the resulting precipitate is dehydrated to prepare alumina.

Aluminum oxide can dissolve polytetrafluoroethylene, and it is non-toxic and harmless to the human body.

Copper fluoride has a more difficult preparation process, and many raw materials are very difficult to prepare under the existing conditions in chemical laboratories.

The key is that this thing is highly poisonous!

I don’t know what they are thinking!

When the two asked Xie Wei what solvent could dissolve polytetrafluoroethylene, Xie Wei thought of copper fluoride as a key material for high-concentration lithium batteries. After mentioning chlorine trifluoride, he also added copper fluoride.

"... Forget it, it's useless! Even if Xie Wei agrees, I won't agree. Xie Wei asked for the money based on his own ability. You gave it willingly..."

Just as Xie Wei was wondering what Zhang Jingyan and Tang Long were up to, he was shocked back to his senses by Du Guowang's words.

Old guy Li Rui said he was not asking for money.

Xie Wei stepped forward and prepared to leave the kitchen.

But Li Rui grabbed him and said, "Don't run! Don't you want to study aerospace? This is also to allow the school to resume the aerospace major faster."

"Principal, without good chips, we can't develop any automation control related technologies. Whether it's mechatronics, fighter aircraft control systems, radar data processing, or even missile attitude control, even the operation control of turbofan engines requires chips!"

Xie Wei said seriously.

Large-scale and ultra-large-scale integrated circuits are extremely important for the development of science and technology in the next few decades.

The technologies mastered by Xie Wei all require advanced computer technology with excellent performance as a foundation.

The chip is the core.

"Didn't the factory in Huadu send money? You can talk to them. If you sign the contract, you will get 60 yuan!"

While Du Guowang scooped hot water to wash the old hen, he gave Xie Wei a brief introduction of how Hou Guoyong and Zhao Liangyu came to the school.

He mentioned it this morning.

When Xie Wei heard that he wanted money, he ran away without giving him a chance to explain in detail.

"Come so soon?"

Xie Wei heard from Li Rui in the morning that he thought the oil factory had replied to the telegram, and the school told the other party through the telegram to find him in Shanghai.

"That's not right. Director Wu and Wang Zheng should have arrived there, right? No news?"

"Don't mention it. I get angry when I talk about these two guys. I received a telegram from them this afternoon saying that the factory doesn't like them and is unwilling to cooperate with them. They asked you what to do."

"where are they?"

“Survey the market.”

Li Rui said angrily, "People have come to our door, and they still say they don't want to cooperate!"

Xie Wei sighed: It seems that the Huadu Oil and Fat Chemical Plant is internally unstable.

There might be problems with the cooperation.

In this case, the money in hand cannot be returned to Li Rui.

All night long, Li Rui tried to persuade Xie Wei to return the money to the school first so that he could deal with the technical teams of 601 and 611 first.

He even promised to pay back double the amount when he had money.

Xie Wei never gave in.

It was not until after nine o'clock that the meal was ready. Xie Wei did not bother to wait for Liang Hongling who had not come back yet. He ate a big bowl of drained rice with chicken soup. After filling his stomach, he returned to school under the pretext of finding out about the coating of the rice cooker inner pot.

"What the hell? Chlorine trifluoride? Are you sure?"

Back in the dormitory, Zhang Jingyan and Tang Long both sat dejectedly on the lower bunk beds, not saying a word.

Without caring about the two of them, Xie Wei directly asked them what poisonous materials they had produced.

Xie Wei was dumbfounded by their answers.

"Uh ah, not the chlorine trifluoride you mentioned?"

"Chlorine and aluminum have the same tone?"

Xie Wei thought about it seriously, and he admitted that because of the original owner, he spoke with a strong Sichuan accent: he couldn't distinguish between nasal and lateral sounds, h/f, and front nasal and back nasal sounds.

Kelu can be read with four tones!
Aluminum is pronounced three times!

Is this the same?
"different!"

The two said in unison, "For this, we specifically found Second Sister Xie and brought her into the laboratory..."

"What do you want to see her for?"

Xie Wei was puzzled.

Xie Rou has a solid foundation in chemical theory, but she seldom does experiments on her own.

He wanted to cut open both of their brains to see what they looked like.

Chlorine trifluoride, a highly toxic substance, and he brought Xie Rou to the laboratory!
"The preparation of aluminum trifluoride is too simple. It is made by reacting aluminum hydroxide with hydrofluoric acid, heating it, and then dehydrating it... Although the chemical formula of chlorine trifluoride is equally simple, chlorine and fluorine are both highly corrosive..."

Tang Long explained awkwardly.

The two of them then realized that it was not that they had heard it wrong, but that they had made a mistake!
"Sixth brother, don't be angry. Second sister Xie said that aluminum trifluoride is a simple thing that can be prepared without any brains, but you didn't even mention it. Chlorine trifluoride, which requires some brains, is what you want us to make..." Zhang Jingyan felt aggrieved.

Can't blame them.

Al(OH)3 + 3HF === AlF3 + 3H2O
Chlorine trifluoride can be obtained directly through the above chemical equation.

Aluminum hydroxide and hydrofluoric acid are common materials in laboratories.

The preparation process is simple and there is no other danger except that the reaction process only releases heat.

"..."

Looking at the two of them, Xie Wei didn't know what to say for a moment.

"That's not right. Chlorine trifluoride is a gas. How can it be used on the coating of the inner pot of a rice cooker?"

Xie Wei asked the two of them puzzledly.

"Sixth brother, chlorine trifluoride is too active and highly corrosive, so we can't use it. So we thought of the method you mentioned before, which is to use anionic copolymerization..."

Seeing Xie Wei's confusion, Tang Long hurriedly explained that after chlorine trifluoride was developed, he never thought of using it for the coating of the rice cooker inner pot, but it was another material.

"Soluble Teflon?"

Xie Wei was surprised again.

"Well, we have been unable to find a material that can safely dissolve polytetrafluoroethylene. Didn't you mention that cesium fluoride (CsF) and potassium fluoride (KF) can be used as catalysts? Potassium fluoride was used in the polymerization reaction, and the result is what we use now."

Tang Long looked at Xie Wei with some trepidation.

Perfluoroalkyl compounds!

Xie Wei became excited.

Tang Long developed perfluoroalkyl compounds, which solved the coating problem in the chip lithography process.

The lithography quality of Radio Factory 14 has been greatly improved, and the chip problem has been solved!

"It's good enough to be scolded instead of beaten. Just write a reflection and write a detailed lab report."

Xie Wei asked the two about the properties of this new material in order to confirm whether it was polytetrafluoroethylene.

As a result, the two told him that they had not done any physical and chemical analysis, but only measured the melting point and thermal conductivity and provided it to the metalworking workshop.

Xie Wei took a deep breath and said thankfully.

"Sixth brother is back?"

Just after we finished chatting, the other people in the dormitory came back from self-study.

After some greetings, Tang Long and Zhang Jingyan went to the all-night study room to write their self-reviews and lab reports, and the others also went to continue studying.

After sitting in the car for several days in a row, Xie Wei endured the discomfort all over his body and thought that he would take some time to go to the bathhouse to take a bath tomorrow.

I was so tired that I fell asleep quickly.

"Have you reflected on this?"

Early the next morning, Xie Wei and the two went to Kang Yi's office.

Seeing the two of them, Kang Yi asked with a stern face.

"Teacher Kang, I was wrong. I shouldn't have let new compounds out of the laboratory without physical and chemical analysis..."

The two of them handed over several pages of "deep reflection" with a sincere attitude.

Kang Yi didn't answer, and turned to look at Xie Wei without even looking at them:

"You come to intercede for them?"

Xie Wei grinned bitterly, "How can I be so shameless!"

"You know you don't have the guts to teach them? I put up with Xie Rou blowing up my lab! I put up with the chlorine and fluorine mess every day! Now, they don't even do any physical or chemical analysis on the products they make, and they just let them flow out of the lab without knowing their properties!"

"..."

When did I start teaching inaccurately?

"Director Kang, I didn't teach them randomly! I just reminded them a few things, such as chlorine trifluoride. Actually, I meant aluminum trifluoride. But they thought it was not that simple..."

Xie Wei won't take the blame.

Chlorine trifluoride is very useful, and its creation is an absolute achievement.

Xie Wei didn't want to take credit from the other two.

More importantly, once he admitted it, he would most likely suffer the same consequences as Zhang Jingyan and Tang Long, and become the first person to "disappear" in the experimental class.

Aerospace cannot be let go.

"Who told you to remind them? Since you entered my lab, what did you say was missing fluorine?"

Kang Yi didn't want to let Xie Wei go.

Nowadays, fluorine is indispensable for any experiment in the entire laboratory, and the key is that this thing is poisonous!

Xie Wei knew that Kang Yi had it, so he suggested to him, "Director Kang, why don't we let them go to the laboratory first and then we can talk?"

Kang Yi, with a gloomy face, asked the two to go to the laboratory first to complete the physical and chemical analysis of soluble perfluoroalkylation.

"Go ahead, I'll listen to your excuses!"

You can't get over this hurdle, right?
"Last night they told me everything they had learned during this period. Chlorine trifluoride is chemically active and will explode if it reacts violently with water. What do you think will happen if it is added to liquid oxygen and kerosene?"

"what?"

Kang Yi widened his eyes and looked at Xie Wei in disbelief.

It is impossible that the director of the Chemistry Department of Harbin Institute of Technology did not understand what Xie Wei said.

Xie Wei nodded seriously and told Kang Yi that it was what he was thinking of.

"This property not only allows it to be used as an oxidant, but it can also be a fuel with a very high energy density..."

At present, the fuel used by domestic rockets and ballistic missiles is a mixture of the first generation of liquid oxygen, kerosene, liquid hydrogen, etc.

It lacks fuel and catalysts that react more violently, so the energy density is not that high.

If chlorine trifluoride is added...

"You can try it."

Kang Yi suppressed his excitement and said calmly that he could give it a try.

This thing is related to national defense security and is highly confidential. At present, he is unwilling to reveal too much to Xie Wei.

"Also, given the properties of copper fluoride, I think we can ask the Physics Department to try using it as the positive electrode material for the lithium battery they are developing..."

Kang Yi's eyes suddenly changed.

"You came here for this?"

"No, the first two are not my purpose. I think the soluble polytetrafluoroethylene provided to the metalworking workshop yesterday may be used in the manufacture of integrated circuits..."

Xie Wei told Kang Yi what he had learned from Radio 14.

Kang Yi looked at Xie Wei in silence, waiting for him to continue.

"When I heard Factory 14's introduction to coating material requirements, I thought polytetrafluoroethylene was more suitable. The integrated circuit lithography process needs to dissolve polytetrafluoroethylene, covering a very thin layer. We have not yet found a solvent that can dissolve polytetrafluoroethylene."

From the beginning, Xie Wei knew that polytetrafluoroethylene and perfluoroalkyl compounds were key materials for semiconductors.

Especially chips with nanoscale process.

Otherwise, rice cookers would not be used to promote the research on polytetrafluoroethylene.

"Do you think that this kind of thing that can be dissolved now can solve the problem of Factory 14?"

"Whether it can be solved or not, we have to try if there is a chance! By increasing the pass rate by 40%, not only will the school chip problem be solved, but the chemistry department will also have a source of funding. The chemistry laboratory is still too rudimentary, and many experimental equipment are not advanced enough."

Xie Wei began to paint a rosy picture for Kang Yi.

The problem can definitely be solved.

But Xie Wei couldn't say it directly.

"Then let's do a physical and chemical analysis and a toxicological analysis first, and provide it to Factory 14 for a trial."

Kang Yi understood what Xie Wei meant.

When Xie Wei was about to say goodbye and leave, he said, "Don't tell Zhang Jingyan and Tang Long about the use of chlorine trifluoride yet."

"???"

"They know that they have accidentally produced such an important material, and sometimes they accidentally tell others about it. Do you think it's a good thing? Also, their foundation is not very solid now, and they don't have a clear understanding of the dangers of chemistry. I will arrange for a special chemistry teacher to guide them during this period..."

Xie Wei understood.

It’s over.

Those two guys will soon "disappear".

Kang Yi directly asked Xie Wei to ask everyone in the laboratory to help speed up the physical and chemical analysis of soluble polytetrafluoroethylene, while he went to find Liang Hongbin.

"Better propellant fuel? Don't lie to me, Old Kang!"

Liang Hongbin looked at Kang Yi in surprise, "You finally made a breakthrough? Did you come up with a solid fuel formula?"

"No, liquid fuel."

The surprise on Liang Hongbin's face disappeared visibly.

He said disappointedly: "Liquid! The energy density is too low. It won't be of much help to what we are doing now."

“What if we could increase the energy of a launch vehicle by 10%?”

"Really?"

Surprise, reappears.

The same weight of fuel can increase energy by 10%, and the range and carrying capacity can be increased by far more than 10%!

The rocket takes off at a faster initial speed, and if the takeoff mass remains unchanged, there will be more fuel left after entering outer space.

Used in ballistic missile fuel...

"Ah? Director Kang, we have just started the physical and chemical analysis. Aluminum chloride is too dangerous. Didn't you forbid us to do it?"

(End of this chapter)