"Why is the magnetometer so easy to burn out?" Chen Lenovo found another point of interest.

Sissy: "There were two reasons, but now it's one reason." When the magnetometer is designed, it is heat-resistant to 4000K. And the ejection temperature of nuclear fusion is at least 100 million degrees! At the beginning of the experiment, I broke several pipes! It wasn't until I added a layer of innate subspace to the inner wall of the tubes that it was solved. This reason no longer exists.

The second reason is that the strength of the magnetic field is very high, the current needs to be very large, and it is easy to cause heating, so I can only find Xiaoice to make a cold ice array instead of the cooling system, but the effect is not good! I can only do two minutes of experiments! Even if I am so careful, the tube is not good for several times. ”

"Understood! No wonder you just said that you want superconductivity or something, dare to love it's current overload!"

"Hey, Meimei, more than 2,000 years ago, when we first received thunder and lightning, we used a thunder-bearing net woven with Nana's purified gold thread? I don't think I have a fever!" Brother Raiden interjected.

"Hey, yes! At that time, we seemed to say that the gold wire was already superconducting or something. Chen Cause and Effect also made up his throat.

"Huh! I remembered! At that time, I also made a lot of spare gold threads with Nana! Look for it, where did you put it?"

"Huh, if the gold wire replaces the copper wire as the wire, don't you have to paint it? Where is the insulating paint? Why don't I go buy some?" Chen Lenovo also wanted to see if the pure gold wire could be similar to superconductivity after using it?

"Find a radio factory first, and then do a causal retrospective, I guess you can find a factory that makes enameled wire! I'll go with you!" Chen also wanted to know the possibility of pure gold superconductivity as soon as possible.

"I'm going to the United States, too! I'm going to read the book on superconductivity!"

"Boss, I'll go too!" Brother Bright naturally likes to go out and play.

......

"Boss, what is this place?" "Huh, why don't you go to the National Library to see it? I know you have donated a lot of money!"

"If it's a regularly published book, there must be a collection there! If you want to see the most cutting-edge technology, I guess I'll have to look for it in the university's internal publications!" "Oh! Why don't you go in yet?" "It's not dawn yet!"

"Isn't it better if it's not dawn? No one will find out?" "No one will find out, but you can't escape the causal involvement! It's better to donate a sum of money during the day and be invited to read a book again without cause and effect!" "Oh!" Because they were afraid that the boss would preach the law of cause and effect again, the Bright Brothers immediately stopped squeaking.

Because U.S. tax laws stipulate that donations to public university libraries can be used in lieu of taxes. Therefore, the librarian who received the check did not make any overly enthusiastic gestures other than warmly inviting a certain guy surnamed Le Peng to come into the library to read. It is estimated that people often come to donate, and it is not strange to see a lot.

In any case, the research on superconductivity was still in its infancy in 1969, and it was still only at the level of 64K low-temperature superconductivity. At this time, the characteristic of the journal is that there are more theoretical assumptions than actual results!

This is more suitable for papermaking! No matter what you say, all kinds of specious superconductivity theories have been poured into the stomach!

When I walked out of the library, the papermaking students consciously understood the principle of superconductivity!

......

"The boss is back! The boss has read the superconducting book in the library of the Masson Institute of Technology!" "As soon as the Bright Brother entered the school space, he immediately shouted. Elementary school students are also yearning for top universities drop!

"Boss, what about superconductivity?" "Boss, can our pure gold wire be made into superconductivity?" "Boss...... "No wonder everyone wants to know the principle of superconductivity, even before the previous life, superconductivity is also a proper high-tech!"

"Don't worry! Listen to me! Why does superconductivity occur? First of all, we must know why metals have resistance. ”

"Resistance generation in metals is caused by disturbances caused by lattice vibrations, defects, impurities, etc., during the transfer of electrons. ”

"The phenomenon of superconductivity means that when the temperature is below a certain critical temperature, the resistance disappears completely!"

In 1911, Kamaurin-Onnis of Leiden University in the Netherlands accidentally discovered that when mercury was cooled to -268.98 °C, the resistance of mercury suddenly disappeared; Kamorin was awarded the Nobel Prize in 1913 for his discovery. ”

"Wow, Nobel Prize!" "Hey, Sister Meimei completed nuclear fusion yesterday, will she also get a Nobel Prize?"

"Listen to the boss continue!"

"In 1933, Meissner and Ausenfeld of the Netherlands jointly discovered another extremely important property of superconductors: when the metal is in a superconducting state, the magnetic induction intensity in the superconductor is zero, but the magnetic field that originally existed in the body is squeezed out. ”

"Experiments on single-crystal solder balls show that when the solder balls transition to a superconducting state, the magnetic field around the solder balls suddenly changes, and the magnetic field lines seem to be excluded from the superconductor at once, a phenomenon that people call the "Meissner effect". ”

Later, people also did such an experiment: in a shallow tin plate, put a small but magnetic permanent magnet, and then reduce the temperature to make the tin plate superconductivity, then you can see that the small magnet actually leaves the surface of the tin plate, slowly floats, suspended in the air. ”

"Boss, why can't I understand the pinch?" "I don't understand either!"

Actually, we only need to remember two things: first, we already have superconductivity! Second, if we solve the impurities, defects, and lattice vibrations of metals, we are superconductivity!

"Huh, boss, when did we ever have superconductivity? We don't seem to have made low-temperature superconductivity, right? Xiaoice, can your cold ice array get minus 268 degrees?" Chen Jin, the Five Elements Brothers, immediately had doubts.

"I guess I can't get it! I've tried, even if it's a thousand years of cold dazzling, it's only about minus 170 degrees. "Chen Bing is one of the four pseudo-mothers of Han Chen Island, because of the ice in his name, he likes to study freezing technology.

"Hey, hey, hey, I want to correct a wrong concept: low temperature is only one of the means to form superconductivity! Superconductivity is the goal!" The smuggling man didn't understand, without the light, the virtual and the real to participate in the discussion, how could other people be easy to distort?

"Then you say that there is already superconductivity! Why don't I know how to pinch it?" "Yes, yes!" The elementary school students were stunned.

"Alas, I don't know the true face of Lu Shan, only because I am in this mountain! ”