Chapter 197 Only familiarity
In the living room, the second cat was jumping up and down on the luggage bag, having a great time.
"Silly cat." Xu Qingzhou complained, got up, packed his luggage with Song Yao, and went back to their houses.
Xu Qingzhou didn't have many things, and he had sorted them out in half an hour. There was only one third of the wardrobe left, and it looked empty. "Should I buy some clothes?"
After thinking about it, he shook his head again, thinking that these clothes were just right, so as to avoid trouble when moving next door.
The two rooms are facing each other, and you can see the opposite room from the door.
Seeing that Song Yao still had two large bags of unopened luggage in the room, Xu Qingzhou smiled and walked over, "Do you want me to help?"
"Bang~"
Song Yao's door closed.
"."
Xu Qingzhou looked strange at the closed door of the room. If he read correctly, there were pieces of small underwear on the bed just now?
Hiss~
Needless to say, the style is quite nice.
He touched his nose, and it was clear from the sky that he really just wanted to help. Now that he was fine, the pink thing lingered in his mind.
With a dry cough, Xu Qingzhou straightened his face and knocked on the door again, "You really don't want me to help you?"
"No need!" The girl's angry voice came from the room.
Ha, I knew I would be rejected, but I just wanted to ask.
Xu Qingzhou did not continue to ask. He might get beaten if he continued teasing. He had nothing to do, cleaned the living room, and then leaned on the sofa to read a book.
The second cat jumped next to Xu Qingzhou and lay down to sleep, its furry tail brushing against his legs from time to time.
At 5:30 in the afternoon, the two of them went out and finished eating at the farm restaurant. Song Yao went to class, while Xu Qingzhou went to the library to read.
Wednesday flew by.
The next day, Xu Qingzhou got up early. Song Yao was earlier than him and was already sitting at the table reading. After Xu Qingzhou had washed up, they went to the cafeteria to have breakfast together, and then went their separate ways to start a busy day. .
Xu Qingzhou went straight to the optoelectronics laboratory. The time difference was almost adjusted, and it was time to conduct experiments. Today was mainly about preparing a 2.0mm BiBO crystal, which was expected to take at least 24 hours.
Try to get it done tomorrow morning and start experimenting.
Ren Xiaoling arrived very early and was waiting for Xu Qingzhou downstairs in the laboratory. The two of them entered the laboratory building together.
In the Optoelectronics Laboratory, Hong Yayu was using a scanning electron microscope (SEM) to detect sample fragments, and Gong Yunfei followed to record.
Gong Yunfei was as enthusiastic as ever: "Junior brother, are you ready to make the fourth sample?"
Hong Yayu nodded and greeted Xu Qingzhou.
Xu Qingzhou said: "Yes, the experiment has been stopped for a long time. If we don't come back, we will not be able to catch up."
"Go to Cambridge to attend a lecture. Junior brother, I'm tired of saying the word awesome."
Gong Yunfei was full of admiration.
Xu Qingzhou smiled modestly. Both sides were busy, and everyone quickly began to focus on the work at hand.
There is no change in the BiBO crystal preparation steps. It still needs to be mixed according to the stoichiometric ratio BiO:BO=1:3, but the amount of raw materials needs to be controlled to ensure that the grown crystals can meet the experimental requirements after cutting.
Xu Qingzhou skillfully put the evenly mixed raw materials into the crucible for melting.
After 3 hours, the seed crystal is introduced, and the melt gradually crystallizes on the seed crystal and grows into a single crystal.
Before the crystal is completely formed, detailed parameters such as temperature gradient, melt flow rate and pulling rate must be controlled, so Xu Qingzhou has to stay in the laboratory all the time. Ren Xiaoling followed Xu Qingzhou faithfully, staring at the furnace without blinking. She was extremely confused, such as the pulling speed. The junior brother did not follow the plan. Instead, he looked at the parameters and made adjustments on his own.
Regarding her doubts, Xu Qingzhou had only four words: Only if you are familiar with it.
In other words, experience and knowledge reserves are very important. For example, he can take a look at the state of the crystal and know that the temperature should be raised. After all, the growth rates at both ends of the polar axis are very different, which may cause the crystal form to deviate from the equilibrium state and form defects.
At 11 o'clock in the morning, the crystal growth entered a stable period. Xu Qingzhou was not so nervous and chatted with Gong Yunfei who was idle at the side, "Where are Professor Zhao and Senior Brother Wang?"
Gong Yunfei said: "The silicon-based composite anode material was tested by cyclic voltammetry at the electrification workstation next door."
"Results so soon?" Xu Qingzhou was surprised.
Gong Yunfei shook his head and said with a wry smile: "It's just a discarded sample. Too much lithium has precipitated and it can't be used at all. They just want to check where the problem lies."
Xu Qingzhou knows this thing. The dendritic metallic lithium formed by the uneven deposition of lithium ions on the surface of the negative electrode, whether it is dendritic lithium dendrites or different forms of metallic lithium appearing on the negative electrode side, is collectively called lithium precipitation.
The growth of lithium precipitation is one of the factors affecting the safety and stability of the battery.
In the next few years, this problem will have been effectively solved, but unfortunately, Xu Qingzhou did not study it in depth and could only wait until he has time to tinker with it.
"The process of failure is the process of accumulating experience. Maybe there will be progress soon." Xu Qingzhou comforted with a smile.
Gong Yunfei sighed: "Junior brother, you still have a good attitude."
Xu Qingzhou thought to himself that if he had a bad mentality, he would have been depressed to death in those repeated experiments.
After the crystal was formed, the rest of the time became boring waiting, so Ren Xiaoling went back to revise the paper.
Xu Qingzhou has no choice but to continue to guard here. During the growth process of the crystal, it will be relatively fragile in the early stage. If something goes wrong somewhere, a few hours of hard work will be in vain.
He asked Senior Sister Hong Yayu to borrow a book on lithium ion solutions to supplement his knowledge in this area.
At noon, Professor Zhao Shengwen and Wang Wei came back, but unfortunately, it would take another day of testing to find out the results.
Professor Zhao asked everyone to go through the information again and wanted to see if there were any problems with the steps.
Seeing that Wang Wei and the others were busy, he had time to come over and talk to Xu Qingzhou: "Xiao Xu, are you looking at the information on lithium ion solutions?"
"Yes, I plan to find out more." Xu Qingzhou nodded.
Professor Zhao smiled and said: "This thing will definitely be a hot research topic in the future. If you are interested, then, Xiao Gong."
"Professor." Gong Yunfei responded.
Professor Zhao ordered: "Give Xiao Xu a copy of the papers and data we prepared."
"Okay." Gong Yunfei replied.
"Thank you, Professor." Xu Qingzhou was a little surprised. These information are important secrets of the laboratory.
Professor Zhao Shengwen waved his hand and said, "It's just some information. I still trust your character."
In addition to being optimistic about Xu Qingzhou, he is also a little selfish. This subject experiment will inevitably require data analysis in the future, and there may be trouble for this kid.
At this time, Xu Qingzhou also guessed some of Professor Zhao's thoughts. If there was anything he could do, he would be willing to help.
"Junior brother, information." Gong Yunfei copied the experimental information to Xu Qingzhou.
"Okay, thank you, senior brother."
(End of chapter)