In fact, Zhang Hao has a little guess about Xuantie:

Isotope!

Dark iron and iron exist in the form of iron oxide in the ore, so it is impossible to distinguish between dark iron and iron in the ore screening process.

During the smelting process, charcoal is used to reduce. In an environment without aura, they can be oxidized into rust and indistinguishable from each other.

In addition, the magnetism, some chemistry, are exactly the same.

What is commendable is that the best dark iron purified by the Zhang family, that is, the density of 99.9% of the dark iron, is just about one-fiftieth more than that of crude iron!

All of this seems to point to an isotope of iron: iron 57!

Of course, the molecular weight of 57 is according to the standards of another world; anyway, Zhang Hao remembers that the molecular weight of iron is usually 56, and there are isotopes such as iron 54 and iron 57 in nature.

And the 'dark iron' here is just a little heavier, and it is likely to be iron 57.

Iron 57 is one more neutron than iron 56!

In other worlds, it is said that neutrons have no properties, and most scientific research revolves around electrons and protons.

Perhaps, neutrons are not without attributes, but there is no aura in another world, and neutrons are superfluous. And with the aura of this world, the importance of neutrons is revealed!

Zhang Hao returned to his room, took out a notebook, and began to write and draw:

If this conjecture is correct, then Zhang Hao also has a little speculation about the nature and function of the alien fire and the real fire - to stimulate the aura and let the neutrons capture the aura!

To test this idea, it is relatively simple in principle. According to ordinary observations, if you want to 'stimulate the aura', the ordinary flame temperature is far from enough, so you need to use some different fire, real fire.

And the easiest way to get high temperatures is 'high pressure'. The representative product is: the pressure cooker.

Of course, if you want to get a temperature far beyond the average flame, this pressure is only extraordinary.

According to the usual smelting data, this temperature must exceed or even far exceed 2,000 degrees. And more than 2,000 degrees is enough for the dark iron to melt.

Then, this requires the search for tungsten ore or graphite. But with Zhang's current weak technology, graphite is the first choice.

Wrong...... Wait, this is the world of cultivation, there are formations! I don't know if I can meet the requirements with the formations?

After lunch, Zhang Hao found his father and asked about the formation.

"A formation that is airtight, can withstand high temperatures, high pressure, and has a large enough area?" Zhang Shengde thought for a while and said, "There are such formations, and the formation that seals the earth fire in our family's smelting base should be."

That formation is called ...... That's right, it's called the Trapped Dragon Array, and yes, it's called the Trapped Dragon Array. ”

"Dad, you can't even name our own formation?"

"Bastard boy!" Zhang Shengde slapped Zhang Hao's head, but he didn't use force, "That formation was helped by others, how can I remember clearly." By the way, that formation was arranged by your uncle. ”

"What about my uncle?" Zhang Hao was very curious, he had never seen anyone on his mother's side, as if he had evaporated out of thin air. It can't be some bloody plot, right?

Zhang Shengde's face was a little weird: "Your uncle...... I can't comment on it. The last time I saw him was more than twenty years ago. He is a master of formation, and his cultivation has also reached the peak of the Jindan period.

But he likes to travel all over the world, saying that he wants to find an opportunity to break through to the Yuan Infant Stage. Left your mother, and after arranging the formation, she drifted away.

There has been no news since. ”

Zhang Hao frowned suddenly, feeling ...... Another very unreliable guy!

"Over the years, your mother has cried several times. But the world is vast, where to look. Hey......"

"What about my grandma and grandpa?"

"When I met your mother, it was only your mother and your uncle. Your mother was just 16 years old at the time. ”

............

In the afternoon, Zhang Hao came to the conference room of the Refining Guild.

Zhou Jue greeted Zhang Hao warmly, "Brother Shi, sit here." ”

The position where Zhou Jue wanted Zhang Hao to sit was actually the position of vice chairman. Originally, the vice chairman was Zhang Shengye, but Zhang Shengye is now very injured and his mentality is not very good, so he ...... Absent.

Zhang Hao said hello to everyone, compared to the Xuantie Guild, the atmosphere of the Refining Guild was more harmonious.

No, Zhang Hao hasn't sat down yet, Mei Qianyun chuckled: "Zhang Hao, just now Zhou Jue said that you have the habit of sleeping lazy?"

A good-natured laugh erupted all around.

Zhang Hao sat down with a dark face and a gray face, but saw that in front of Zhou Jue, there was a piece of irregular silvery-white metal the size of a child's fist, the metal was slightly yellowish-white, and there was a spiritual light circling on the surface, and the spiritual light was slightly deep.

"It's ...... Star Essence?"

Zhou Jue nodded: "The inner guard sent it, more than 25 kilograms." This thing is almost three times the weight of dark iron. ”

"Can I take a look?"

Zhou Jue nodded. Zhang Hao took it and tried it, and by the way, he used his own immature identification technique to make an identification; the metal the size of a child's fist weighed 25 kilograms, and the roughly estimated density was almost 3.5 times that of dark iron.

Zhang Hao's eyes narrowed: the metal from space, which is almost 3.5 times denser than iron, exists in the form of elemental matter. Isn't that what it is...... Iridium, right?

And remember that on the periodic table, iridium seems to have a molecular weight of 192 and an atomic number of 77, that is, iridium has 115 neutrons, and the number of neutrons far exceeds that of protons!

If this thing is really iridium, then Zhang Hao can conclude that there must be something related to aura and neutrons.

Zhang Hao quietly put down the star essence gold, and sent his admiration by the way.

After a while, a few more people came, and Zhou Jue clapped his hands: "The meeting has begun." Today we are going to talk about management models, the identification of departments and heads, and new production methods. ”

The meeting lasted until the evening, especially when it came to new production methods, when it came to the division of labor, streamlined operations and other issues, Zhang Hao showed off a little.

At the end of the meeting, Zhang Hao suddenly got up, "Wait a minute, I want to buy a set of array flags or array disks for the trapped dragon array." It should be able to withstand high temperatures, high pressures, and be airtight. ”

Mei Qianyun was the first to speak: "What you want is a formation that can withstand high temperature, high pressure, and impermeability, right?"

"Yes. ”

"Our Jade Snow Mountain Villa has a set of 'Binding Mountain Formation', and the complete Binding Mountain Formation can even seal the volcano. ”

Zhang Hao was overjoyed: "Let's have a set! It's good to be simple." ”

Mei Qianyun immediately smiled: "A simple set of mountain binding formations, you need to ...... A ton of dark iron for alchemy!"

Zhang Hao's face suddenly darkened: "Fairy Mei, we are all acquaintances, give a real price." You report the spirit stone, and I will convert it to you Xuantie. ”

Mei Qianyun smiled proudly: "Zhang Hao, do you know how complicated a set of mountain binding formations is? Even if it is simple, there are one hundred and eight array flags. It's enough to make the Zhang family unable to get through and trap the Yuan infancy!"

Zhang Hao's eyes lit up: Ha, have you thought of this? Okay, Zhang Hao agreed and asked for the manual-a jade slip.

"Tomorrow, the flag will be delivered. The Zhang family has to prepare the dark iron. ”

"It will take a little time. How about ten days?"

"Good!"

As soon as Mei Qianyun finished speaking, Mu Yingying immediately grabbed the words: "We have a complete trapped dragon array at home, and the effect is very good." As long as a thousand high-grade spirit stones are enough. ”

"I want two sets! We pay for it with the special dark iron for alchemy. Zhang Hao opened his mouth.

"Okay!" it was Mu Mingchen who answered.

Zhou Jue finally had a chance: "Brother Shi, our Jiuyang Sect has a more powerful 'Trapped Immortal Array', which is similar to the Trapped Dragon Array, but it is several times stronger. ”

"Then another set! Also pay with the special black iron for alchemy. ”

Zhou Jue was unceremoniously: "I want a ton." ”

"Yes. Zhang Hao was very simple, "But this price, is it a little higher?"

"Brother Shi, don't worry, if you find out that the price is expensive in the future, we will refund it all!"

Zhang Hao smiled and turned his head to look at everyone: "Whoever has a similar formation, welcome to provide it." The Zhang family paid for all the special black iron for alchemy. Pay the cost price for this only time!"

"Young Master Zhang, we have a set of 'Zhou Tian Sealing Demon Array'. ”

"We have the 'Great Zhou Heaven Sealing Demon Array' and the 'Eight Directions Refining Demon Array'. ”

"We have a 'Demon Refining Array'!"

"We have ......"