After the six electric furnaces started working, Zhugu Jifu walked to the first electric furnace calmly, and carefully observed the change in the green body of the porcelain support shaft device in the furnace through the observation window. After a few minutes, he moved to the next electric furnace to observe the state of the green body inside.

In this way, it took about twenty minutes before and after. He observed the sintering state of the green bodies in the six electric furnaces, then nodded and said to Geng Xiaofang: "Director Geng, the temperature control of these six resistance furnaces is still unsatisfactory, especially the overshoot of the set temperature is a bit large, and after the temperature is adjusted, the fluctuation range of the precise constant temperature maintained reaches the range of positive and negative five degrees."

The so-called overshoot of the set temperature refers to the fact that after the temperature in the furnace sintered by the resistance furnace reaches the set temperature, it often requires a certain degree of overshoot. For example, the set temperature is 500 degrees Celsius, then when the furnace temperature reaches 500 degrees Celsius, it must continue to rise to about 510 degrees Celsius to 520 degrees Celsius. The higher ten degrees Celsius and twenty degrees Celsius are called overshoot.

When the temperature in the sintering furnace reaches the overshoot, it will slowly be adjusted to the pre-set working temperature, and then the positive and negative temperature changes near the set working temperature. This positive and negative temperature change value is called the fluctuation range of precise constant temperature maintenance.

Geng Xiaofang seemed to understand the professional terms that Zhugu Jifu said, but he could still understand the general meaning. He couldn't help but feel nervous and asked quickly: "Professor Zhugu, are these six resistor furnaces not qualified and cannot be used?"

Sun Guishan also looked at Pig Little Jifu with a nervous look on his face.

"Don't change it, but Director Sun said just now that these six resistor furnaces are the most advanced industrial electric furnaces in China. Unless you have imported electric furnaces with better performance in Tianzhong area, what kind of electric furnace can you replace them with, right?" Zhugu Jifu waved his hand, "Although the accuracy of the six electric furnaces is a little worse, the test margin left by my pre-sintering is still relatively wide. This fluctuation value is still within the designed bearing range. This is why I have to place nine supporting shaft green bodies in different positions in the sintering furnace of each electric furnace."

Geng Xiaofang and Sun Guishan were relieved. Professor Jifu of Zhugu is worthy of being an authoritative expert of Neon Country. When designing the experimental plan, he had already considered the impact of the performance of the electric furnace on the experimental results. By increasing the number of experimental samples, the defect of insufficient precision and precision in the temperature control of the resistance furnace was successfully offset.

"Okay," Zhugu Jifu patted his hands gently and said with a smile: "I think you must have a lot of questions about the pre-burn plan I arranged? Then the next question is the time to answer the questions. If you have any questions in your mind, you can ask them. I will answer the questions on the spot."

There was a lot of surprise talk at the scene.

Including Sun Guishan, I thought that Zhugu Jifu could tell them the operating procedures for secondary sintering, and it would be very good to lead them to sinter a qualified porcelain support shaft device. I never thought that Zhugu Jifu would answer questions on the spot and tell them all the principles involved.

He is truly an authoritative expert in Neon Country. What a noble character!

"Professor of Pig Stocks, let me ask first!" Sun Guishan was afraid that others would not dare to speak to the neon expert, so he decided to throw bricks and attract jade. "I would like to ask, why did you only use three temperature indicators of 500 degrees Celsius, 700 degrees Celsius and 800 degrees Celsius when you designed the pre-fired plan, and the pre-fired time was set at five hours and ten hours?"

"Director Sun, your question is very critical!" Zhugu Jifu praised Sun Guishan first, and then replied: "Because according to our research experience, the heat treatment of ceramic bodies below 300 degrees Celsius is basically still in the drying stage and is a continuation of drying treatment; and the main component of our pre-sintered porcelain support shaft device is alumina. The aluminum oxide body will shrink by 0.4% during the pre-sintering process with a working temperature of more than two hours and a working temperature of more than 1,000 degrees Celsius, which will have a relatively large impact on the second sintering. Therefore, the maximum working temperature of pre-sintering is best not to exceed 800 degrees Celsius."

"In addition, the working time of presintering also has different effects on the tensile compressive strength of the blank. According to my experience accumulated over the years of presintering, the strength of alumina green body will undergo a relatively significant change after five hours and ten hours at the agreed presintering temperature, while the change is very slow and not very obvious after less than five hours, or more than ten hours."

"Considering that your factory has only six resistor furnaces, in terms of experimental efficiency, other pre-firing time periods are omitted and only set two pre-firing time periods of five hours and ten hours, which is the most economical and most effective."

Except for Hao Shuang and Yang Guanghui, everyone on the scene looked at Pig Ke Jifu from a 45-degree upward perspective. It is very simple to say these things, but if you have not experienced countless experiments and repeated trial and error, you will never be able to master them.

But Professor Jiff, who stood here, taught them the valuable experience he gained in countless experiments without any hiding. And without considering Professor Jiff's technical level, just for this character, it would be enough to be named the title of contemporary Bethune!

Hao Shuang was a technical master in his previous life. He didn't know how many pig-sellers he could beat. He naturally sneered at this superficial knowledge that college students majoring in the same ceramics as him in his previous life could basically master.

Yang Guanghui did not look up to Zhugu Jifu because he really didn't care. As the technical secretary of the project team, he was holding a notebook and using shorthand symbols to faithfully record every word that Professor Zhugu Jifu said.

Seeing that Zhugu Jifu had questions and answers to Sun Guishan, the rest of the project team became bolder and raised questions in his mind to Zhugu Jifu about the presintering process.

Zhugu Jifu patiently, like Grandpa Sun Jingxiu who told stories to children on the radio, gave very detailed answers to the questions raised by all the project team members, making everyone in the project team feel enlightened and benefited a lot.

This scene continued until 10:30 in the morning. Zhugu Jifu looked around the scene and saw that no one asked any questions anymore. Then he turned his head to Geng Xiaofang, who was standing beside him, and said: "Director Geng, the fastest pre-sintered sample results will be out, and it will be after 2:00 in the afternoon. Now I have answered all the questions on the project team. So, look at the next time..."

What time is next?

Geng Xiaofang suddenly reacted. Didn’t Shi Yicheng report on the phone that Professor Zhugu was very interested in firing the imitation of the sky green glaze of Ru kiln? Why not take this time and take Zhugujiv to the art ceramic workshop of the Special Pottery Factory for a visit?

Thinking of this, Geng Xiaofang said, "Professor Zhuge, otherwise Director Sun and I would accompany you to Meitu Ceramics Workshop..."

As soon as he said this, he suddenly heard a sound from the corner of the scene, "Professor Zhuge, I think you are optimistic! Your secondary sintering process cannot actually solve the problem of firing a porcelain support shaft device at low temperatures that the Tecao Factory project team is currently facing!"
Chapter completed!