Chapter 436

Faculty of Mathematics and Physics.

These two are the foundation of all disciplines, and the other is the leading discipline of the natural sciences, both of which are transcendent.

Perhaps many people think that these two disciplines have always been in a contradictory relationship between I despise you, you despise me, and no one obeys anyone.

But in fact, the two disciplines have been in a friendly and cooperative relationship since their inception.

When you think about it, that's exactly what happened. Whether it is the study of mathematics or physics, it is like walking on a lonely path, isolated from the mass society, and there are few companions.

You can't assume that others will understand what Diophantine analysis is, and what condensed matter physics entails.

Therefore, for mathematicians or physicists, they are among the few who can share a common language.

Heroes cherish heroes, that's probably how it feels.

Therefore, there is no such thing as a verbal confrontation or a big fight between the two in order to compete for the status of the academic community.

The two professors' dissatisfaction with Cheng Nuo is not because of Cheng Nuo's status as a "mathematician", but because of questioning Cheng Nuo's academic level.

They really couldn't understand why the person sent by Director Alding was Cheng Nuo, a guy who felt unreliable just by looking at his appearance!

But after all, Cheng Nuo is a person sent by the director, and it is not good for the two professors to keep Cheng Nuo aside, otherwise the relationship with the director will be very stiff in the future.

So after hesitating for a while, the older researcher called out to Cheng Nuo. "Who's that, come over and help look at some of this data. ”

Cheng Nuo raised his eyelids, looked in the direction of the older professor, and continued to lower his head to play with his mobile phone.

The older professor was helpless, glanced at the young professor standing outside the vacuum room, took the stack of experimental data in his hand, and got up and came to Cheng Nuo's side.

"Mr. Cheng Nuo, don't make it difficult for us. Although I don't know what the purpose of the director sent you to our research group. But what I need to tell you is that the project we have in our hands is a first-class project of the Royal Academy of Sciences, and if it is not delivered on time, the responsibility will not only fall on the two of us. ”

Cheng Nuo put away his mobile phone, looked up into the eyes of the older professor, and said in an unhurried tone, "Professor Alding asked me to come here because I heard about the trouble you were in and specially asked me to come over to help." And I am not here to be angry with you. Judging a person's academic level by his age alone, do the professors of Cambridge University judge people by this? In this way, if you pull a beggar of seventy or eighty years old on the street, you should all be honored as an academic master!"

"You ......," the older professor was so angry that his beard stood on end.

However, to be a professor is not a reckless man who does nothing without using his brain. Cheng Nuo's few words were not enough to provoke them to lose their minds.

The older professor's face was a little red with anger and quickly returned to normal, glanced at Cheng Nuo, who was looking at him with a smile, snorted coldly, and said, "I admit that what I just said is a bit arbitrary, but what I said is common sense. ”

The older professor handed Cheng Nuo a stack of A4 papers recording experimental data, "If you can really analyze the reason for the failure of the experiment in one day, you can prove that you are the kind of person who breaks through common sense." At that time, the two of us will definitely apologize for our previous arbitrariness. ”

Cheng Nuo smiled. He took the stack of experimental data from the older professor and smiled happily.

"One day is not necessary, one hour is enough. ”

Cheng Nuo's confident tone made the older professor's heart keep drumming.

In order to avoid being said to be looking for foreign aid, Cheng Nuo sat directly in the laboratory and looked at the large pile of experimental data.

There is a lot of data, and more than 50 groups of experiments have recorded more than 100 sheets of A4 paper.

The experimental data of more than 50 sets of experiments were not the same, but the results were all the same, because they all failed.

Cheng Nuo ignored the eyes of the two professors who looked at him from time to time, and his mind was completely immersed in the pile of experimental data.

............

"Research on the Preparation of Nano Ultrafine Powder by Electrodynamic Technology", which is the full name of the project.

To put it simply, it is to use the theory of current fluid dynamics to prepare nano ultrafine powder.

Nano ultrafine powder is a kind of solid particle material in the intermediate state between atoms, molecules and macroscopic objects. Can be used for: high-density magnetic recording materials、...... Optoelectronic materials, advanced battery electrode materials and many other practical fields.

The traditional method of preparing ultra-nano differential is not only costly, but also has quite strict requirements for the environment and materials, which makes it difficult to popularize and apply it on a large scale.

Once the research experiment of electrokinetic preparation of nano ultrafine powder is successful, it can be easily prepared by simple quartz capillary and super voltage, and the cost is less than 10% of the original. Moreover, there are no such harsh requirements for the preparation of nano ultrafine powder materials.

It is no wonder that this project is not too difficult, but it is listed as one of the 100 first-class projects of the Royal Academy of Sciences.

Once this thing is made, the value it can create is simply not too great!

Thinking about this, Cheng Nuo knew why the two professors were in such a hurry.

It took more than ten minutes for Cheng Nuo to look through all the data and record all the data in his mind.

Then, Cheng Nuo closed his eyes, constructed a table in his mind, and filled in the experimental data one by one.

The purpose of the two professors was to prepare nano ultrafine powder that met the requirements, but after more than 50 experiments, the particle size of the powder obtained did not meet the requirements of nano ultrafine powder.

In each experiment, only one-tenth of the powder can be guaranteed to be below 100 nanometers, and if it is only this success rate, there is no need to conduct research at all.

What Cheng Nuo needs to do now is to find the problem through deduction.

Under the experimental conditions of preparing ultra-nano powder, there are many independent variables, but there are only a few that have an impact on the particle size of ultra-nano powder: the voltage of DC high voltage, the frequency of DC high voltage, the experimental temperature, the diameter and length of the capillary nozzle, the pressure of the transported melt, and the resistance of the melt along the flow in the capillary......

"Is there any scratch paper?" Cheng Nuo said suddenly when he looked up.

The older professor pointed to a corner of the lab, "It's all A4 paper over there, just use it." ”

Looking at Cheng Nuo's back, the older professor touched his chin and thought deeply.

He paid attention to the time, and less than half an hour had passed since Cheng Nuo got the experimental data.

Don't...... He had an idea so quickly?

Cheng Nuoke didn't care what the older professor thought, took a few sheets of A4 paper, took out the pen he carried with him from his pocket, and began to calculate the data on the paper:

[Let r be the minimum average radius of ultrafine powder, o be the surface tension of the molten metal, £ o be the dielectric constant under vacuum, μ be the coefficient related to the field strength, G be the amount of droplets formed per unit time, and U be the DC high-voltage ......]