Great Power Ship

Chapter 253 The Eye of the Submarine
Guo Yongwei next to him was very surprised by Wang Jiahai's actions.

Although his teacher can't be called an authority, because of his previous experience, he is well-informed. Guo Yongwei dare not say anything about other aspects. Things about ships rarely surprise his teacher.

After all, what they are doing is at the forefront of this field.

But the things in front of him made his teacher very excited, which made Guo Yongwei very puzzled. Now he took off his eyes, wiped them with a handkerchief, and squinted his eyes to look carefully at the things Wang Jiahai nestled in his hands. .

The texture is like rubber, but it is harder than rubber, and it has a ceramic system; it can be said to be ceramics, but it is softer and more resilient than ceramics in the traditional impression.

As for the color, it looks mediocre, grey, even if it is thrown on the street, it is estimated that it is not gold or iron, even if it is a scavenger, it will be kicked into the garbage dump in distaste.

But it is such a thing with no aesthetic feeling and no texture, but it makes his teacher's hands tremble a little. Seeing this, Guo Yongwei couldn't help muttering in his heart, this thing seems not simple, but what is it nearby?Why don't you know?
"Old Wang, don't bury people!"

At this time, Fan Jiahang dusted off the briefcase and said, "When did our Zhujiang factory rely on others for key materials? Besides, even if we want to buy this thing, do those developed countries in Europe and America sell it?"

"You guys made it yourself?" Wang Jiahai looked in disbelief.

"Then what do you think?" Fan Jiahang took it for granted, "You have studied this more deeply than me. What situation do you not know?"

It is precisely because of the deep research that Wang Jiahai was surprised, surprised, and unbelievable when he saw this thing in his hand. You must know that he saw this thing once in the United States, and he saw it when he visited a certain head of the headquarters.

At that time, the U.S. isolated them 10 meters away. Wang Jiahai and other colleagues had to lean over, stretch their necks and poke inside vigorously to see clearly.

And the American reporters were on the sidelines, smiling and taking pictures of their ugly appearance with their cameras.

The next day, American newspapers published "Chinese Scientists See the World's Most Advanced Submarine Sonar for the First Time", exaggerating the U.S. submarine sonar technology and teasing Chinese scientists for their ignorance. At the end of the article, I did not forget to call on Chinese scientists to come to the United States to exchange and study more, so as to enrich their knowledge and academic cultivation.

It is accompanied by a comparison photo of Wang Jiahai looking sideways and Chinese-American scientists working in a high-level laboratory.

The meaning it wants to express is self-evident. To be honest, Wang Jiahai was lying when he said that he was not tempted. The monthly salary in China was less than 60 yuan, and the starting monthly salary in the United States was 3000 US dollars.

60 yuan and 3000 US dollars, this treatment is simply heaven and earth.

What's more, the United States has the most high-level laboratories in the world and the most advanced scientific research equipment in the world. As long as he can calm down and rely on his ability and background, it is not difficult to come up with a few high-level academic achievements.

Famous and profitable, who would not be tempted!

But in the end, Wang Jiahai suppressed his desire to go abroad and stayed in China, not because he didn't want to go, but because he remembered a sentence from his mentor back then: "If you are not strong, it's useless to go anywhere, so I came back from abroad to build My own motherland, so don’t listen to those foreigners, they are so good, why don’t you give us the nuclear submarine? So, Xiao Wang, keep your eyes open and see the essence. If you have no strength, you are not qualified to speak loudly in this world. Speaker!"

Because of this, Wang Jiahai stayed in the country and went to the research institute with a sinking heart.

However, many of his colleagues could not withstand the temptation and went to the United States. Several of them developed well, and one even entered a certain underwater acoustics research laboratory and achieved extremely gratifying results. Several papers were published. Published in the world's authoritative journal of hydroacoustics.

One of them was sent as a gift to Wang Jiahai who stayed in China. Because of this, Wang Jiahai knew that the thing he looked at with his sideways and neck stretched back then was called piezoelectric rubber, and his other nickname was more intuitive-submarine eye!
"Teacher, what is this?"

Guo Yongwei didn't know that Wang Jiahai's thoughts were aroused by Fan Jiahang's words, and seeing that he hadn't spoken for a long time, he asked a question.

The pensive Wang Jiahai finally came to his senses when he heard the words, and smiled to ease his embarrassment: "Oh...this is piezoelectric rubber!"

"Piezoelectric rubber?" Guo Yongwei frowned: "What's the difference between this and piezoelectric ceramics!"

"They are both the core materials of underwater acoustic transducers and key components of sonar equipment. However, the difference between the two is also very large. Generally, ordinary piezoelectric ceramics can work normally at a water depth of about 100 meters. If it is deeper, it will become less sensitive due to the noise of seawater fluid and background clutter.

However, the use of piezoelectric rubber does not have this problem. According to American experiments, high-precision positioning can be carried out at a water depth of about 500 meters, and long-distance underwater acoustic communication can also be carried out.

Therefore, the latest batch of nuclear submarines in the United States all use this material as the main material of their hull sonar arrays. Not only that, but due to the sound-absorbing properties of piezoelectric rubber itself, the main material of submarine side array sonars being developed by developed countries in Europe and the United States. Piezoelectric rubber is generally used as the material..."

Wang Jiahai held the piezoelectric rubber in front of his eyes, and eloquently introduced this brand new underwater acoustic material to his students, which has only been used in European and American naval submarines in recent years.

The eloquent ones are like a few treasures.

If it's left to other people, I guess it's really hard to tell. Thanks to the paper sent by the colleague who went abroad, Wang Jiahai has really learned a lot.

But it is only seen in knowledge.

Because he has never seen piezoelectric rubber before, it's not that he doesn't want to make some and research it, but this thing is very expensive, and only the United States has the corresponding production technology in the world, and even countries with nuclear submarines like Britain and France have to start The United States imports this critical material.

The Soviet Union heard that there was research in this area, but because the investment was too large and the process was too complicated, which did not match its own simple and rude style, it gave up halfway, and then ran away along the road of old piezoelectric ceramics. , so far gone forever.

In the 70s, Soviet submarines were indistinguishable from European and American submarines in this regard, but since the US Navy nuclear submarines began to be equipped with submarine side array sonar, the underwater situation awareness of both sides has undergone earth-shaking changes.

In order to make up for the gap between the two sides, the Soviet Union could only increase the tonnage of the submarine and increase the power of the sonar, hoping to use high power to make up for the lack of accuracy.

The problem is that the tonnage of submarines is large, and the cost has also increased exponentially.

But the Soviet Union had no choice. They couldn't produce exquisite piezoelectric rubber, so they could only use some original methods that cost more money but had poor results.

Even the Soviet Union, one of the world's two tiers, can't handle it, let alone the country, so after a brief introduction to his students, Wang Jiahai looked at Fan Jiahang again with the piezoelectric rubber in his hand: "Are you sure this Did you do it yourself?"

However, Fan Jiahang laughed: "You old Wang, you still have the old virtue of not giving up until the Yellow River. If you don't believe me, I will go to the material workshop with me later to have a look, and it will be over!"

(End of this chapter)