Just when Shen Jing's heart was emotional, Chen Zhou returned.

There is also a boy with a thin and tall, wearing glasses.

"Senior, let me introduce it." Chen Zhou pointed to the boy next to him, introduced, "This is the same table of my high school Zhang Yifan, the Department of Chemistry of the University of Science and Technology of China, I was shouted to help."

After speaking, Chen Zhou pointed to Shen Jing again: "This is the senior Shen Jing who came to Luzhou this time to participate in the topic. Like me, the Department of Mathematics of Yanda."

"Hello." Zhang Yifan and Shen Jing asked each other.

"Yifan, come here." Chen Zhou moved the chair, put it beside the table, and then said, "The literature you downloaded in the afternoon, remove the 47 articles in the previous 47, the specific process information in the literature behind, just Rely on you to help me sort it out. "

"No problem." Zhang Yifan nodded, but then he thought of something wrong. If you remove 47 articles, there is still ...

???

Chen Zhou laughed and looked at Zhang Yifan and said, "I believe you can!"

Zhang Yifan: "..."

Shen Jing looked at Zhang Yifan, then got to Chen Zhou, and asked softly, "When will you let him help you download the literature?"

Chen Zhou said: "I called him before going to Dr. Wu's office and asked him to help find the literature materials. After all, some literatures can be made in the school library."

Shen Jing looked at Chen Zhou deeply.

When I heard the words of the two, Zhang Yifan smiled and said: "I thought Chen Zhou suddenly called me what was going on. As a result, I asked me to help check the literature. I said that you came to Luzhou this time, and how could he make a sound in advance What about greeting? "

Chen Zhou said with a smile: "Didn't I just arrived? I just looked for you as soon as I arrived, isn't it enough?"

Zhang Yifan is not placed. He estimated that if it wasn't for the literature and materials, Chen Zhou probably called before leaving.

However, he also understands that this is not a holiday, but there are tasks.

And look at this posture, it should be a tight task.

So after receiving the phone, Zhang Yifan didn't say a word. It took a afternoon to help Chen Zhou for the literature.

What makes him very puzzled is that Chen Zhou's guy actually wants so many literature ...

Is this thing more good?

"I heard that you are going abroad to make an academic report?" Zhang Yifan asked Chen Zhou when he thought of the news he saw on the Internet.

Chen Zhou sat back in front of the table, turning the literature, and said, "Well, on the 15th of next month, a proof of hail conjecture, a report."

"You can break the kettle. I thought the news on the Internet was not credible, but I didn't expect it to be true!" Zhang Yifan was very happy for Chen Zhou.

Chen Zhou smiled and urged: "You work quickly, and ask you to eat big meals! You have to go back to school at night, not too late."

"Transaction!" Zhang Yifan laughed.

Immediately, the two no longer talked, and they were busy with the work in their hands.

Shen Jing couldn't help but look at the two. Chen Zhou and Zhang Yifan were seriously looking at the literature. They didn't look like just now.

"Is this too fast?" Shen Jing whispered secretly.

However, he didn't know that Zhang Yifan's learning habits were basically when he was repeated in high school. He sat next to Chen Zhou and was pressed by the pressure.

Not only Zhang Yifan, the classmates around Chen Zhou have been more or less affected by a lot.

While Chen Zhou changed, they were also changing silently.

Chen Zhou gave Zhang Yifan and Shen Jing, respectively, which also gave him time to study the entire preparation process of diamond film.

Only by fully understand can we improve the preparation method.

Moreover, Chen Zhou did not plan to study the MPCVD method from the beginning.

He intends to make a comprehensive first, and then seek a breakthrough.

The preparation method of diamond film has a change.

From high temperature and high pressure in the 1950s, to the first CVD method used by scientists in the early 1980s, to today's multiple synthesis methods.

It is said that it is a variety of synthetic methods, but it is actually based on the CVD method to improve.

[Hot Silk CVD Method (HFCVD) Preparation of King Kong Stone Film]

This document has a comprehensive introduction to the HFCVD Legal Stone Mask.

Although this method is the originator of the CVD method, it is still very common now, and it has developed into one of the more mature methods for depository stones.

This method needs to set metal hot wires above the substrate, which is commonly used like tungsten wire, filament.

Then heated the high temperature of carbon -containing gas to 2000 ~ 2200 ° C to decompose to form active particles.

Under the action of hydrogen atoms, diamonds will be deposited on the substrate.

Although this method is simple, the deposit efficiency is very low, which is much lower than the method used in forty -three now.

Not only that, but also poor craftsmanship, it is easy to cause pollution.

Although two improved methods are also mentioned in the literature, Chen Zhou also disagreed.

Because the efficiency is improved, the quality of diamond film is still too low.

The study of diamond semiconductor materials and devices is obviously not applicable.

However, the improvement method, Chen Zhou thinks that you can try it.

One is the HFCVD method that reflects the split of gas, that is, sending carbon -source gas and hydrogen from the bottom and above of the thermal wire.

The other is the HFCVD method of electronic help. By adding a partial pressure of about 150V to the substrate, the deposition rate is improved.

Chen Zhou reads the literature very fast. Even if he reads while remembering, his efficiency far exceeds others.

This is also due to the bonus provided by his system discipline upgrade.

Before coming, he raised his chemistry quietly to LV2 for the need for from time to time.

Therefore, with the bonus of chemical discipline levels, Chen Zhou crazy draws related chemical knowledge.

Different from learning mathematical physics, Chen Zhou does not intend to learn chemistry and creatures in the same way.

The two doors of chemistry and creatures are more biased towards experiments and applications. Chen Zhou intends to start from experiments and applications.

With the bonus of the disciplinary level, we can find unknown from experiments and applications.

Then check the information to make up for that unknown.

Although there is no mathematical and physics system, the efficiency is very high.

And it is very suitable for the current Chenzhou.

After reading the HFCVD's literature three articles, Chen Zhou felt that the general thinking was almost the same, so he would no longer be entangled in this method.

In this way, he started to look at the next method, burning flame deposition method.

This method was first proposed by Japanese scholars, but it was confirmed in the Laboratory of the Atlantic Ocean.

This method is mainly to mix carbon source gas and oxygen and burn in the atmosphere.

The burning flames are divided into three districts. In addition to internal flames and outer flames, there is also a layer of restoration of flames.

Place the substrate in the reducing flame area of ​​the flame to generate diamonds.

The key to this method is the mixed ratio of acetylene and oxygen R.

Only in the R = 0.7 ～ 1.0 area can it grow into diamonds.

Other areas are not conducive to the growth of diamonds.

"R = 0.97 ~ 1.0."

Chen Zhou frowned slightly and looked at the interval he wrote.

He saw from the literature that when R = 0.97 ～ 1.0, this method can prepare a transparent optical diamond film.

I habitually ordered some draft paper with a pen. Chen Zhou temporarily skipped this information and continued to read the literature.

[The advantage of this method is that the equipment is simple, the cost is low, and can be synthesized in the atmosphere. The growth rate is fast (60-150um/h), which is conducive to the sedimentation of diamond on the surface of the surface of large and complex shape samples.]

[The disadvantage is: the sedimentary diamond film has an uneven micro structure. The film often contains non -pure things such as non -diamond carbon. Due to the thermal gradient of the flame, it is easy to make the substrate bending and deform, and produce larger heat in the film in the film.

stress.】
Chapter completed!