Shulou(Shulou.com)11/24 Report--

A "hidden clue" of room temperature and pressure superconductors, which has attracted the attention of the global scientific and technological circle, has been dug up-the discovery of new materials is purely an accident.

Because just now, some netizens found that, in addition to the two papers that were hotly discussed before, there was a sentence in a Korean paper published in April:

When the quartz tube is damaged due to internal pressure during rapid cooling or reaction. It is found that it has unique magnetic properties.

I'm sorry, I'm sorry, I'm sorry. I don't know. I don't know what to do.

And some netizens said that the author of the LK-99 paper hid some key steps.

Others thought of penicillin (penicillin) which was also discovered by accident.

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So what's going on here?

The paper to break the quartz tube at the right time to mention the above sentence is "Consideration for the development of room-temperature ambient-pressure superconductor (LK-99)".

As mentioned earlier, the Korean team was the first to publish a paper in Korean.

In the second chapter of the paper, in the experimental method, the author introduces that they have been trying to prepare this material since 1999.

The preparation method is to select the corresponding elements, fully grind, put 1g into the quartz tube with a diameter of 10 mm, then pump the quartz tube to the-third power Torr of 10 by vacuum pump, and seal the quartz tube with propane-oxygen under this condition, and the sealing length is about 15cm.

Then the quartz tube was heated to 900 degrees, reacted for 24 hours, and finally the sample was extracted.

But the authors say that due to problems with the preparation method, they have not been able to find a special material structure with a critical temperature of more than 300K.

Until 2017, when they began to conduct a large number of experiments again, due to factors such as the rapid cooling of the quartz tube or the internal pressure during the reaction, a substance showing unique magnetism was discovered when the quartz tube accidentally ruptured.

This substance exhibits unique superparamagnetism (superparamgnetism), not superconductivity.

This reminds the author of a study using EPR technology, which makes him wonder if he can also use this method to study superconductivity.

However, it is mentioned in the paper that it is difficult to make progress only by EPR technology before determining the material structure and obtaining high purity samples.

How exactly did he do it? He said he had applied for a patent on these processes and did not clearly write them in the paper.

Then, the paper gives the specific preparation method. That is, the method that people from all sides at home and abroad are scrambling to adopt.

It is theoretically estimated that this preparation method can be found out in only 3 days.

As a result, a weekend has passed, and no one has yet repeated the good news of success.

Still no one has succeeded. First, let's take a look at the situation in China.

Bilibili UP is the main "Guanshankou male technician". At present, the experimental results can only show that the prepared material is diamagnetic, weak and not superconductive.

The profile of the home page shows that this UP is from Huazhong University of Science and Technology.

Among the experimental data he shared, one of the more noteworthy points is that a jump from zero to negative magnetism of the material can be seen, which ordinary metals do not have diamagnetism.

△ source: bilibili UP main Guanshankou male technician overseas, a relatively fast Indian team, contacted the South Korean team after the recurrence failure, and got a reply.

Lee Shipei, one of the Korean team, said that the 1D structure of LK-99 is the key to superconductivity, so purity is very important, so reproduction needs to strictly follow their firing procedures and conditions.

However, some netizens said that many details of the experimental steps were not given in the South Korean team's paper, which may make it more difficult to reproduce.

And the uncertainty of the firing process itself is very strong, so the probability of success may be relatively small.

At present, the main UP "Guan Yamaguchi male technician" should continue to try to reproduce.

After hearing that the quartz tube had accidentally ruptured during the preparation of the South Korean team and had to shake the liquid properly, he said he would try to install a rocking car on the stove.

As for when can we wait for a definite recurrence result? I'm afraid it's not as fast as I thought.

One condensed matter physicist said on Twitter: the public thinks this experiment is simple, this kind of synthesis is not easy.

Some scientists predict that if it is true, it will be possible to get results in a week or so.

And it is worth mentioning that the South Korean team did not refuse to allow outsiders to test the samples directly, so the results will have to wait and see for a while.

One More Thing just two days ago, bilibili Up "Da Haofang" in Seoul went alone to the legendary "Quantum Energy Research Center" for a field visit.

Maybe many friends will think that this place may be jammed, but the reality is...

Well, it's kind of deserted.

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The "headquarters" is located on the negative floor of the building, which, in the words of the Up owner, is "mediocre, without a house number".

However, the attitude of South Korean netizens towards this new research can also be said to be quite split.

For example, there are aunts like this:

South Korea ranks first in the crime of fraud among OECD countries.

Although at present, the reappearance of the army at home and abroad still has not given a substantive result, but still that sentence, let the bullet fly for a while.

Reference link:

[1] https://twitter.com/altryne/status/1685755096465055744?s=20

[2] https://hackmd.io/@sanxiyn/S1hejVXo3

Https://www.zhihu.com/question/614426480

[3] https://www.bilibili.com/video/BV1f841117Ur/?spm_id_from=333.337.search-card.all.click&vd_source=1da63cf85df97568b93eb5f22aae3fa3

[4] https://space.bilibili.com/7590247/dynamic?spm_id_from=444.42.list.card_title.click

[5] http://koreascience.or.kr/article/JAKO202315638176796.page

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