Chapter 433 (2/2)

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

There are a lot of data. More than 50 groups of experiments have recorded more than 100 pieces of A4 paper.

The experimental data of more than 50 groups of experiments are not the same, but the results are the same, because they are all failures.

Cheng Nuo ignored the eyes of the two professors who looked at them from time to time. His mind was completely immersed in this pile of experimental data.

…………

”Research on Preparation of nano ultrafine powder by electrokinetic technology” is the full name of the project.

In short, it is to use the theory of electrohydrodynamics to prepare nano ultrafine powder.

Nano ultrafine powder is a kind of solid particle material in intermediate state between atoms, molecules and macro 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 ultranano differential is not only high cost, but also has very strict requirements for environment and materials, which makes it difficult to be widely applied.

Once the electrodynamic preparation of nano ultrafine powder is successful, it only needs a simple quartz capillary and extra high voltage to prepare nano ultrafine powder. The cost is less than 10% of the original. Moreover, there are not so strict requirements for the preparation of nano ultrafine powder materials.

No wonder the difficulty coefficient of this project is not too high, but it is listed as one of the 100 first-class projects of the Royal Academy of Sciences.

Once this thing is made out, the value it can create is not too big!Having figured out this point, Cheng Nuo knew why the two professors were in such a hurry.

After more than ten minutes, Cheng Nuo looked through all the data, and then recorded all the data in his mind.

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

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

In each experiment, only about one tenth of the powder can guarantee the particle size below 100 nm. If only this success rate is used, there is no need to carry out research.

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

There are many independent variables in the experimental conditions of preparation of ultra nano powder, but only a few have influence on the particle size of ultra nano powder: DC high voltage voltage, DC high voltage frequency, experimental temperature, diameter and length of capillary nozzle, conveying melt pressure, resistance of melt flowing in capillary

”Do you have draft paper?” Cheng Nuo suddenly raised his head and said.

The old professor pointed to a corner of the laboratory. ”There are all A4 papers. You can use them.”

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

He paid attention to the time. It was less than half an hour since Cheng Nuo got the experimental data.

Is He's got ideas so soon?

No matter what the elder professor thought, Cheng took a few pieces of A4 paper, took out his pen 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 liquid metal, ￡ o be the dielectric constant under vacuum, μ be the coefficient related to the field strength, G be the amount of droplets formed in unit time, and u the DC high voltage 】