For depleted uranium alloy, Liu Yijiu did not expect that there was research in this area in the Ninth Academy.

His father knew that this was also normal, and it was not a problem to lay out this since the sixties, but the problem was that he didn't know how the old man could get the big guys to agree to carry out this research in this area.

Although the difference between uranium-235 and uranium-238 is outrageous, for those who don't understand, there is absolutely no difference.

Since the history of the Republic, there has been only one company that has studied the use of weapons.

As for the peaceful use of nuclear energy, it seems that the Republic did not have anyone who specialized in this aspect at the beginning! Even the reactor of the nuclear submarine seems to be the responsibility of the Ninth Academy.

didn't speak, just silently followed Liu Suxue towards the front.

Inside, I didn't feel that there was no air circulation or breath holding because I was deep inside the mountain. This mountain has such benefits, it is cold in winter and cool in summer, and there is no need for air conditioning at all, and there should not be much temperature difference in the entire cave all year round.

"The temperature difference here is no more than six degrees, there is no air conditioning, a natural constant temperature cave, the highest temperature is 24 degrees, and the lowest is only 18 degrees. The fan outside is mainly to reduce noise......" Liu Suzhi explained to several people.

But it's also true, even in the main base over there, you don't have to wear too thick clothes in winter, and you naturally have to wear a coat in summer.

"This outside area is mainly to study graphene, and this area needs constant temperature, but we have not made progress in compressor technology......"

Look ahead. Heavy glass separates a large area, but these are not very large chunks. Almost every one is two meters long and one meter wide. Then the middle is connected with aluminum alloy, which looks very good.

"Graphene research requires constant temperature? If there is dust in it, how to solve this? Liu Yijiu asked with a frown.

The research of graphene does have high environmental requirements, but it is definitely not dust-free and constant temperature.

"It's not that the environment for studying graphene needs constant temperature and dust-free, but the detection equipment inside needs constant temperature and dust-free, 10,000 times the optical microscope, 50,000 times the electron microscope, all of which are there. Goods from the early sixties, smuggled back from Europe. Liu Suxue smiled bitterly, "There are several testing equipment here, and three people died in the Situ family......

Liu Yijiu sighed.

There are always many unsung heroes who are silently giving their lives for the rise of the military industry of the Republic.

In the small room where the entrance was isolated separately, after being blown by a powerful fan, I put on the white hexagram in the cabinet, and then changed into rubber shoes, and only after removing the static electricity on my body did I enter the laboratory separated by glass, and there were only three old-fashioned optical microscopes in an area of more than 100 square meters. An even larger electron microscope.

Several researchers in white coats were busy inside.

It didn't divert their attention just because a few people came in.

"It's so shabby?" Liu Yijiu said with a frown.

It stands to reason that this should give people a sci-fi feeling, at least it has to be that kind of lofty feeling, right?

But there are only a few empty devices and a few people. And then there are a couple of tables.

"It's just used to test the structure of various materials and analyze the grain structure of materials. The physical and chemical analysis room was next to ......, "Liu Suxue did not introduce Liu Yijiu to what he is currently researching and testing.

It's the same thing anyway, and it's not often used here.

Graphene research is also good. Whether it is the research of depleted uranium alloys, none of these things can be solved in a day. Graphene. It is necessary to continuously use various mechanical and chemical processes to test and see how this material can be produced on a large scale.

And depleted uranium alloys. This has to test the chemical formula, the production process of various physical conditions.

Liu Yijiu nodded.

After all, these things were very difficult things for the Republic of the Sixties.

The equipment in it, even the lack of these equipment on the main base, did not let them use it, you can think of the importance of these equipment.

"Don't worry, there will be more advanced equipment in the future. It won't be long before the Americans will take the initiative to send it to us. Liu Yijiu nodded and didn't say anything, the foundation is like this, so he hasn't made much progress in the ten years since graphene was discovered, and he doesn't know much.

He knows the process and formula of large-scale preparation of graphene, but for the sake of insurance, he must not put it forward now, whether it is a chemical method or a physical preparation process, it cannot be said. If you bring this up now, it will definitely make people suspicious.

Liu Suzhi's identity is only known to Liu Suxue and Wang Shunyi, and even those bigwigs don't know his identity, after all, Liu Suzhi is a great scientist who is even more powerful than Qian Lao. With his identity, he can completely fool the bigwigs, and this base doesn't want the country to spend a penny, all of which Liu Suzhi raised from Chinese people all over the world.

Of course, whether this is the case or not, only Liu Suzhi knows it, and the bigwigs also know it in their hearts.

Coming out of the inside, continue to walk ahead, near the right side of the mountain, there is a small gate, the height of the whole gate is only two meters, the width is less than two meters.

At the doorway, there was also a small room, where more than a dozen clothes and helmets that looked like spacesuits hung from it.

Seeing Liu Yijiu and the others in a daze, Liu Suxue smiled and explained to a few people.

"According to our research on uranium-238, although the radioactivity of this element is much lower than that of uranium-235, this is still isolated to avoid affecting the people in the entire base. The walls around here are isolated by a total of ten layers of five-millimeter-thick lead skin, and all the people inside are wearing radiation-proof suits made of thin lead skin, and the outside is coated with copper and nickel......"

"How much does this garment have to weigh?" The corners of Liu Yijiu's mouth twitched.

This was supposed to be the first generation of metal radiation protection suits.

To protect against X-ray and γ-rays. That is, the radiation rays of uranium, which can only be made of metals such as lead and copper, nickel. This protects researchers.

When you see this in front of you, you don't have to think about it. Liu Yijiu knows that this is the first generation of lead clothing, and the weight is absolutely light.

If his father knew anything about plastics, he might have developed materials such as modified polyethylene (PE) and polyvinyl chloride (PVC) to make better protective properties and lighter radiation protective clothing.

"The total weight is 16.23 kilograms...... Liu Suxue also smiled bitterly, "Because of this, there are high requirements for the physical strength of researchers, and every time they work in it, it will only take four hours at most......"

"Forget it. The radiation of uranium-238 is not very strong, so there is no need to wear this. When Liu Yijiu heard the weight of 16.23 kilograms, he immediately gave up wearing this.

Unless it's uranium-235.

"It's okay to be in there for a short time without wearing a radiation suit." Liu Suxue also nodded.

When he was about to enter that door, Liu Yijiu asked Li Rui to stay outside, although the radiation of uranium-238 was not very strong, but what if......

Li Rui was very dissatisfied with this decision, but in the end, he could only pout and stare at Liu Yijiu and the others as they entered the room that didn't know what was inside.

"Now for depleted uranium alloys, is there a finished product? Not used to make armor for tanks. If it is enough to make a bullet with a single core or armor-piercing bullet...... "As soon as I entered the door, I saw that there were many people busy in the space of hundreds of meters, which was obviously different from what I saw earlier.

On a workbench not far from the door, Liu Yijiu saw a palm-sized piece of alloy. When I got it in my hand, I suddenly sank, and I almost didn't hold it. My eyes couldn't help but light up a little.

There is a lot of equipment, as well as some tensile machines and pendulum impact testers for impact tests. Of course, there are also a lot of things in the other test tube beaker glass dishes for chemical analysis. He even saw a few small high-temperature stoves! It's so confusing. It doesn't feel like a laboratory at all, it's more like a small production pilot shop.

"At present, we are experimenting with an alloy to add molybdenum, niobium, titanium and lutetium with trace heavy rare earth elements to uranium-238, and the effect is very ideal, but this large-scale production is not possible, the cost is too high, according to our current process, the cost of one ton of this depleted uranium alloy will exceed 800,000 US dollars......"

Liu Suxue shook his head.

"......" Liu Yijiu was completely speechless.

800,000 tons, still dollars!

This thing is even much more expensive than titanium alloy, and although the effect of making armor-piercing bullets from depleted uranium alloy is very good, the cost is too high. Not something that a country with a very poor economy like the republic can afford.

Lutetium, a heavy rare earth element, seems to have only a few million tons of oxide reserves on the entire earth, and they actually use this for the research of depleted uranium alloys!

Pure lutetium is a silvery-white metal, which is the hardest and densest metal among rare earth elements; The melting point is 1663 °C, the boiling point is 3395 °C, and the density is 9.8404. Lutetium is relatively stable in air; Lutetium oxide is a colorless crystal that is dissolved in acid to form the corresponding colorless salt. Lutetium is mainly used for research work and has few other uses.

This thing, even in his own time, was rarely used in industrial production.

"What if you don't use lutetium?" Liu Yijiu gritted his teeth and proposed, according to the current cost, without lutetium, which is extremely troublesome to refine, the cost may drop a lot.

"No, it's still a matter of process preparation. We are still researching other formulas, and if powder metallurgy can be realized, the cost will drop a lot......," Liu Suxue said, licking his lips.

Powder metallurgy! (To be continued......)

PS: Brothers, if you have a monthly pass in your hand, throw it out quickly, and it will be scrapped after twelve o'clock in a while.

In addition, the junior high school teaching books and extracurricular reading materials in hand, and ready to donate can be moved, and Ahri National Day is not a holiday.

The address is: Guizhou Province, Bijie City, Qianxi County, Chongzhen Re-Middle School

Attn: Li Zhonglin

Telephone: 18285126104

Hulu would like to thank you all here. I'm going to start resuming the update tomorrow.,Where's the support?