“Orders abroad?”

Guo Tailai couldn't help but wonder: "What's the matter?"

"Maybe it's high-precision processing!"

Charles shrugged his shoulders and said irresponsibly: "Who knows?"

What's going on?

Will Charles tell himself this for no reason?

"That depends on friendship."

Guo Tailai didn't understand what the situation was, but he still replied to Charles: "If you have a good relationship or are particularly interesting, of course you can consider it."

If you have never dealt with someone and have a normal relationship, then forget it.”

"Well, then I'll know."

Charles's attitude was obviously here to explore the way for others.

Guo Tailai was also curious about what kind of high-precision processing needs Charles to ask if he has time?

But soon, the next day, Guo Tailai knew what processing was.

"This is Mr. Peter Baker."

Charles rarely brought a German to Guo Tailai: "He is the head of a project at the Berlin Institute of Metric Sciences in Germany."

Peter was a very standard German. He shook hands with Guo Tailai in a straightforward manner and then expressed his admiration for Guo Tailai.

"Mr. T! We admire your achievements in processing."

Mr. Peter came up and said a compliment first.

"Exceeded!"

Guo Tailai smiled and shook hands with the other party, saying humbly.

"Long story short."

Mr. Peter saw that he was a scientific researcher and didn't know how to exchange greetings. He came up and got straight to the topic: "Mr. t, do you know big k?"

“Big k?”

Guo Tailai was puzzled for a while, and after a quick turn in his mind, he remembered: "International kilogram original device?"

The international kilogram prototype kilogram, referred to as ipk, is nicknamed by ordinary scientific researchers as "big k".

In 1878, the International Bureau of Metrology manufactured a replica of three kilograms of the original machine, which was a platinum-iridium alloy cylinder containing 90% platinum and 10% iridium.

In 1889, at the 1st International Measuring Conference, it was decided to use one of the ones with the closest mass to the original kilogram kilogram as the international kilogram kilogram and store it in the International Bureau of Measuring.

Since then, the international kilogram maker (ipk) has been preserved in the basement of the headquarters of the International Bureau of Weights and Measures (Paris).

The "big k" is strictly stored in a triple bell-shaped glass cover, and there are 6 official replicas next to it that are both 1 kilogram standard.

The outermost layer of glass cover is drawn into a half vacuum to prevent air and impurities from entering.

"Yes!"

When Mr. Peter laughed when he heard Guo Tailai know about Dak, he saved him a lot of trouble in explaining: "Dak has some changes that we don't expect."

With Mr. Peter's explanation, Guo Tailai soon knew what was going on.

Although the International Bureau of Metallurgical has kept it very closely, the "big k" still produces errors due to the adsorption of the surface and the wear and scratches caused by years of use.

The responsible metrology personnel found that after more than a hundred years of baptism, an error of 50 micrograms had appeared between the international kilogram original and its copy.

The 50 microgram error has little impact on our daily lives, but it has a great impact in the field of cutting-edge technology.

Therefore, one of the top tasks in the current international metrology industry is to use natural constants as a benchmark to redefine "kilograms".

Scientists from the German Institute of Metrical Sciences and Russia, Australia and other countries jointly established a "Avogadro Project", hoping to create a perfect sphere composed of silicon 28, and use this silicon sphere to redefine the mass unit "kilogram".

The purpose of the "Avogadro Project" is to accurately calculate how many atoms are in the "perfect silicon sphere", so as to obtain a new breakthrough in determining the Avogadro constant (i.e., the number of basic units contained in a mole of any substance), and then revert the standard of the mass unit "kilogram" to the definition related to the constant constant.

This "perfect silicon ball" sphere is very close to the ideal sphere, with a diameter of about 10 cm, and the distance from the center of the sphere to any point on the surface does not exceed one-thirty millionth of a millimeter, that is, 0.3 nanometers.

"You mean, hope I can process this silicon ball?"

After hearing Mr. Peter's description, Guo Tailai's eyes lit up a lot.

"Yes!"

Mr. Peter nodded: "To be precise, we separated and manufactured the purest silicon 28 from the centrifugal separator of the former Soviet Union's refining weapon-grade high-purity uranium, and then grew into a huge crystal through mature equipment for producing silicon in Germany. After six failures, we finally made 25 kg of crystal blocks."

"As we had planned to send these two high-purity silicon crystals to Australia, and an optical engineer who has worked at the Australian Centre for Precision Optics (ACPO) for decades to make a pair of silicon balls."

Mr. Peter also did not hide their plans: "But we have a better choice after learning about your past Mr. T.

You and acpo each make one, and we will finally choose which one to use."

"I'm very interested!"

Guo Tailai is really interested in this kind of project with extremely difficult and challenging nature.

At present, Guo Tailai's processing accuracy can only reach 1 nanometer, but the surface processing capacity can be lower than 1 nanometer. Of course, this is also through extremely fine polishing.

Guo Tailai also wants to know what changes will he bring to replace all nanorobot diamonds with artificially synthesized diamonds with the same molecular weight.

“There is a very difficult place.”

Mr. Peter seemed to be a little confused. Under Guo Tailai's gaze, Mr. Peter said a little embarrassedly: "Our project is purely scientific research, so the funding is not much. The processing cost may not meet your usual cost standard."

Don't have money and want to create good things?

Guo Tailai understood why Mr. Peter was embarrassed.

This is normal. Sometimes this pure theoretical definition research may not have huge funds. After all, whether silicon spheres can be approved by the International Metrics Commission for the current method is also a question, so the institute's investment may not be decisive.

"I'll make a call."

Faced with this problem, Guo Tailai did not directly refuse. After thinking about it, he decided to ask.

This time Guo Tailai called Principal Gu, and it happened to be in the afternoon in China.

After reporting to his family, Guo Tailai did not keep it in hiding. He told the Avogadro plan here and asked the school if he was interested in this project.

“Redefine kilograms?”

Principal Gu also knew technology. After hearing this, he asked Guo Tailai to wait for a while. After calling a few other phones on the landline to discuss, he gave Guo Tailai a reply: "Several professors are very interested!"

"learn!"

Guo Tailai knew the school's attitude and felt confident.

When facing Mr. Peter again, Guo Tailai also gave a clear reply: "If you allow my alma mater to join the plan, I can process one at the price of the acpo."

“No problem at all!”
Chapter completed!