Chapter 328 Comrades who are engaged in sensors will rush to answer
Before he could recover from the shock of selecting type B thermocouples, he had already seen the performance indicators listed later.
This made him immediately throw away all the platinum, rhodium, rubies and so on. What are those? Can it be eaten?
He recited all the parameters, his voice getting louder and louder, and his mood getting higher and higher.
At the end, he slapped the table: "Okay! Good job Gao Zhendong!"
A sudden increase of 500 degrees in the measurement range, high stability, and high accuracy.
The accuracy of 2.5 parts per thousand is already very high. For example, regardless of the use of inspection agencies Not to mention the instruments for testing, the water meters and electricity meters responsible for collecting water bills in a few decades will probably be at this level.
And his eyes were fixed on a line of words in the briefing.
"Suitable for strong radiation environments."
He knew the meaning behind this very well. There was an urgent demand for K-type armored thermocouples in the desert, and this type B was Not to mention.
As for whether there is something fishy in this, are you kidding me? If it were someone else, he might have to verify it, but this thing was made by Gao Zhendong, so as long as it was written in black and white, it would be certain.
The leader touched the briefing with great treasure and couldn't help but said: "It seems that he really can't rest."
He called Secretary Sun and put the briefing into his hand. Deliver: "As fast as possible, transfer to the National Defense Working Committee!"
Ten minutes later, the correspondent led by the National Defense Working Committee walked into his office and handed him a document.
"Leader, urgent message from the 17th Machinery Department."
The leader immediately reached out to take it. With the 17th Machine Department and the urgent matter, the matter must not be trivial.
Looking at the rows of data and explanations on the paper, the leader looked happy and felt like dozing off. With the smooth progress of several things in the desert, the original measurement methods were no longer enough. It is also one of them. Even if you have not encountered a bottleneck yet, it is time to prepare for a rainy day.
Not long ago, the comrades who came over there on a business trip had raised this issue. Unexpectedly, Gao Zhendong solved it quietly, and even raised funds from the factory.
He rubbed his eyes and said something similar to the leader of the 17th Machinery Department: "Comrade Zhendong still has to suffer."
He asked the correspondent to call the confidential room Comrade: "This thing, quickly transfer to the desert. How many are needed, they will tell you as soon as possible."
This is the true meaning of good things spreading thousands of miles, and with the efforts of Comrade Gao Zhendong, this "thousands of miles" is much more convenient than before.
Deep in the desert, several scientists were talking about the newly received batch of computers.
“This technology has really developed. With just a little bit, it can do the same thing as DJS-59?”
“This is a good thing, if nothing else. The calculation speed of the model and test data is even faster."
"Haha, this thing is so small, I'm afraid the two kickers have other ideas."
"I'm afraid it's not just a matter of thought. They personally brought this batch here. They have probably thought about where to install it and how to fix it eight hundred times." Keep an eye on it, don't let them blow it up, hahaha."
At this time, someone came over in a hurry: "Boss, it's an urgent matter from the National Defense Work Committee."
One of them took the document. , opened it and took a look, with a happy face: "The support from the committee was so timely, I really don't know how they did it."
After hearing this, several other people knew that it was good news and started asking.
The man handed them the document in his hand: "Take a look for yourself."
Several people circulated it, the document will be passed around, and the smile will be contagious.
Everyone had a smile on their face.
The boss smiled at a few of them and said: "This time, your experiments can continue. You don't have to worry about designing experimental plans, doing indirect measurements or side evidence, you can do it directly."< br>
A few people smiled and nodded: "Yes, yes, it is suitable for high radiation environments. The people who made this type B thermocouple are really amazing. It is as if they were tailor-made for us, even with the issue of radiation reinforcement. All saved.”
Even if there is an alternative to K-type thermocouple, it is not as good as using type B thermocouple directly. The more intermediate links there are, the greater the chance of trouble.
What's more, the meaning of substitution often means that the alternative is not the best, and there are always defects and problems of this kind.
The boss smiled again and said: "But be careful when you use it. I think this thing is covered with money, hahaha."
A few people nodded and said: "Yeah , sure, we will hold a meeting to determine the installation size and quantity, and start work as soon as possible. The comrades in the committee have accomplished this so quickly, we cannot let down their efforts.”
< br>If they knew that this thing had nothing to do with the request they made to the National Defense Work Committee, it was purely a by-product of technological transformation, and the project was established much earlier than the time they made the request, they would not know how surprised they would be. ——Oh, all the comrades who work on sensors will be quick to answer! ! ! !
One day later, the demand for B-type thermocouples from the comrades on the two lines in the desert came back to the 17th Machinery Department.
The leader of the 17th Machinery Department was about to notify the No. 3 Rolling Mill to organize production, but suddenly he seemed to remember something and stopped.
After thinking for a while, he said to Secretary Sun: "Inform the director and chief engineer of the third rolling mill to come to the ministry for a meeting tomorrow, just the two of them."
Secretary Sun wrote down After checking the work arrangements, he asked: "Boss, are there any other departments or personnel that need to be informed about this meeting?"
The leader shook his head: "No, by the way, you can just inform the chief engineer of the department, and there is no need to do anything else." The single crystal of silicon is really not difficult for him.
At this time, he was in Gao Zhendong's office, and the latter was reading the inspection report of the finished silicon dioxide single crystal.
Although it is a simple inspection report, Yu Yuncheng did a solid job, with a lot of pictures, tables, data analysis, conclusions, etc.
Gao Zhendong read it carefully and put the materials on the table.
"Well, this thing is no problem. Come on, here is the next work plan. It includes the material ratio and the preparation of polycrystalline mercury cadmium telluride compound polycrystalline. You can take a look first. As for converting compound polycrystals to single crystals, wait until the compounds come out. The two steps use the same furnace. First prepare a batch of compound polycrystals. When it comes to pulling out single crystals, the furnace does not need to switch functions frequently. This pulls The processing time is too long, and frequent switching affects the work too much."
As he spoke, Gao Zhendong pretended to take out a piece of material from the safe. As for the actual source of the material, it was not clear.
Yu Yuncheng took it happily and read it carefully.
In terms of materials, the preparation of compounds is actually relatively simple. Even if you just look at the process, as long as the equipment and materials are fine, it is probably at the level where you can do it with hands.
First, calculate the component of cadmium based on the required infrared band, combined with the formula given by Director Gao and the cavity volume of the quartz reaction tube, and then back-calculate the components of mercury and tellurium based on the component of cadmium.
Calculate the weight, weigh and install the tube, and then burn and seal the quartz reaction tube. This is considered as the material preparation is completed.
When synthesizing, put the reaction tube into a special furnace and burn it!
The component materials melt at high temperatures. The melting points of these three materials are far lower than the melting points of the quartz tube, so the quartz tube will not be burned. As for why it is necessary to burn and seal the quartz tube directly instead of directly Just put the raw materials in the crucible and burn them. This involves the issue of mercury vapor pressure. In short, this is the simplest method.
After melting, the three materials will generate a mercury cadmium telluride compound. At this time, an operation needs to be added to make the compounding process more effective.
It's not a fancy operation, just keep shaking it, but the shaking time is a bit long, it takes 1 to 2 days.
This is also one of the reasons why it is difficult to conduct mercury cadmium telluride. In any step, the reaction or operation time must be calculated in days. Gao Zhendong told Yu Yuncheng that an experiment would take several months or even half a year. That's how it came about.
When the shaking time is almost up, blow the quartz reaction tube with high-pressure nitrogen at high speed, and you have the mercury-cadmium telluride polycrystal.
Isn’t it very simple?
This process is complicated by two things, the formula to determine the components based on the infrared band, and the furnace used for heating. This is why it is said to be a special furnace.
Even high-pressure nitrogen is not necessary. In fact, if the conditions are poor, high-pressure air is not impossible.
The formula is ready, and Director Gao has already written it down. As for the furnace, Director Gao has also drawn up a schematic diagram, a swing furnace that can pass high-pressure gas.
As for the schematic diagram to the actual furnace, this step is what Yu Yuncheng has to do himself.
Don't look at these simple two steps. Yu Yuncheng wanted to produce a sufficient amount of mercury cadmium telluride polycrystals. It took him a month or two to do so. The furnace had to be remodeled. After the remodeling, more than one furnace could be produced. It takes at least two or three days for crystals, no more, at least one and a half months for ten crystals.
After all, Gao Zhendong can just draw pictures and write materials, and this is what Comrade Yu has to consider.
Yu Yuncheng asked Gao Zhendong a lot of details that he didn't quite understand, and Gao Zhendong answered them one by one.
After a long time, Yu Yuncheng put away the materials with satisfaction, gathered his troops, and returned to his base camp 1761 to shake the pipe.
Sending him off, Gao Zhendong quickly put an end to his plans for integrated circuit technology.
In fact, a lot of work in this plan is not only for the current integrated circuit, it is a general technology. Take the matter just now as an example, ion implantation doping, metal wire deposition, etc., are all at the same time. Prepared for Mercury Cadmium Telluride line array thermal imaging sensor.
After all, mercury cadmium telluride is also a semiconductor, and processing it requires the addition of semiconductor technology.
After spending half an afternoon and finalizing the plan, Gao Zhendong first passed it on to Factory 1274 and asked them to take a look at it first. After the two parties reached an agreement, they would submit a joint report.
This matter is just like a confession. The confession itself is actually just a formality. What really plays a decisive role is the processes before it.
(End of this chapter)