Potassium nitrate, no wonder it burns so violently when thrown into the fire, this is the main material for making black powder that I have been looking for for a long time.

Originally, Chen Xu had tried to make black powder several times before, but unfortunately he wanted to go to the toilet and pigsty to get some nitrate based on his previous experience, but unfortunately it was finally confirmed that those were all deceptive.

Covering his nose in the stinky pigsty, he swept out a few baskets of damp soil that seemed to have yellow-white powder, and then drenched it with water to get several large basins of turbid muddy water, and after clarifying, put the water on the earthen stove and boil it slowly, and the whole yard of boiling exuded a foul smell and urine smell, and even Niu Dashi, more than a hundred meters away, could smell it at home, Xing'er and Chen Jiang's didn't know why Chen Xu wanted to boil the smelly and dirty feces and urine in the pigsty, so Xing'er Boss was unwilling, was beaten hard by Chen Jiang's buttocks, and then he cried with his small mouth, covered his nose and mouth, and continued to make a fire.

Niu Dashi couldn't stand the smell at home, and he came over to see it several times, under the accusation of Xing'er adding oil and vinegar, Niu Dashi, who was defeated by Chen Xu's super creativity and feat of boiling and urine, publicized that Chen Xu had brain disease again, and wanted to cook and urine at home to drink, and then because of this incident, Niu Dashi was almost beaten out of by Chen Xu, and was forced to forcibly help boil and urine for a day.

After the feces and urine were dried, a layer of white crystal powder was obtained, Chen Xu tried to mix this white powder with the sulfur and charcoal powder ground into powder, put it in a clay pot and slowly stir it evenly and bake it at a low temperature, and finally got some black mixture, but the result was not ignited, and it only ignited a stimulating sulfur smell when thrown into the stove, although the flame was slightly intense, but it was far from reaching the power of the so-called gunpowder.

After several successive failures, Chen Xu gave up completely, and before he found potassium nitrate, he was very suspicious that he could not make the legendary black powder, so he settled down and began to study something else.

But when he had recently turned all his attention to ironmaking and ceramics, potassium nitrate was found by two little girls.

Am I so stupid, knowing that the temperature of the cave is very low, and knowing that it is a kind of salt, I didn't think of it in advance?

Chen Xu put the bamboo tube and walked out of the laboratory, and rushed back to the living room.

"Brother Xu, we didn't lie, we have dinner tomorrow, we want to eat meat, we want to eat braised beef noodles!" Seeing Chen Xu coming in, Yu Ji, who was playing on the kang with Xing'er, hurriedly hid behind Chen Jiang and whispered.

The smile on Chen Xu's face was about to blossom, and he strode to the edge of the kang and grabbed Yu Ji, kissed her twice on the cheek and said, "Don't worry, my brother will not only give you meat and rice tomorrow, eat braised beef noodles, but also give you lollipops!" ”

"Wow, I'm so ashamed, my brother actually kissed Yu Ji's sister, and she can only marry you as a mother-in-law in the future!" Apricot scratched her cheeks and shouted shame.

Chen Xu's hand shook, put down Yu Ji with a dry smile and said, "Nonsense, what I want to marry in the future is your sister Shui!" ”

"I'm afraid of Shizi, when Yu Ji grows up, she can also marry Engong!" Yu Wuya, who was studying chess alone, suddenly spoke.

Chen Xu's face twitched a few times, and he said viciously: "You want to take advantage of me!" ”

Belch! Yu Wuya hurriedly lowered his head and thought and stopped talking.

Shui gently lowered her head and knitted the wool, and couldn't help but cover her mouth and sneer, and her delicate figure swayed gently on the wall with the light of the pine lamp.

Early the next morning, as soon as it was dawn, Chen Xu couldn't wait to get up and burrow into the laboratory and start tinkling inside.

Because of the discovery of potassium nitrate, he basically didn't sleep much during the night of excitement.

Judging from the two iron pots brought back yesterday, the iron-making furnace at the town's blacksmith shop has basically achieved the expected goal, as long as there is enough coal and iron ore or pig iron, it is only a matter of time before steel suitable for forging is made, and the process will not take long to achieve.

And as long as the gunpowder is also studied, it is basically not too far from the earth guns and earth cannons, as for the power, you can not consider too much for the time being, you can really make explosives bags and grenades, it doesn't matter if the power is not big, the main thing is that it can sound, and it can scare the turtles of this era.

The white powder in the bamboo tube is not clean, because it has been mixed with the soil for too long, but Chen Xu doesn't care too much, what he cares about is whether the potassium nitrate and sulfur carbon powder can burn violently and produce an explosive effect after mixing.

Pour out the potassium nitrate and soil in the bamboo tube, carefully crush it gently with a wooden pestle, because there is sand, so I don't dare to act too violently, for fear of rubbing out of the explosion of Mars, because potassium nitrate is very unstable, a little high temperature and open flame will ignite and explode, and the gunpowder explosion relies on the principle of this strong unstable state of potassium nitrate, adding sulfur and charcoal is mainly used as a reducing agent and stabilizer, otherwise it may explode during transportation.

After preparing the three powders, Chen Xu carefully mixed them together with a spoon, for the sake of safety, the amount of potassium nitrate is not too much, and it is not necessary for it to achieve the effect of explosion, as long as it can achieve the effect of rapid and violent burning, after finishing it, put it in a small clay pot and put it on the earthen stove of the fire kang to bake it slightly, and carefully carry the small clay pot to the courtyard.

"Ridian, what are you doing?"

Looking at Chen Xuru's expression and movements as serious as worshipping ancestors in a clay pot, Wang Wu and Wang Qi, who were wearing short hangers and clanging with big swords, stopped curiously, wiped the sweat on their foreheads and walked over together, staring at a handful of black things in the clay pot with big bull's eyes, their faces full of curiosity.

"Don't get too close, beware of explosions?" Chen Xu hurriedly said.

"What was the explosion?" Wang Wu asked confusedly.

"It's just a burst of fire and smoke, if this gunpowder has more than ten catties, the effect will be like the Nine Heavens Divine Thunder, and the four of you will be blurred by the explosion in an instant!" Chen Xu explained.

Wang Wu, Wang Qi, and the four people stared at each other, their faces were full of disbelief, Wang San shook his head and said: "Don't joke about Lidian, don't say more than ten catties of such a small pinch of black mud powder, and more than ten pots can't blur our fried flesh and blood, and the little finger can't ......."

"Hehe, I'll show you later!"

Chen Xu turned around and went to the kitchen, lit a finger-thick wooden stick in it, and after burning for a while, the front part turned into fiery red, so he quickly took the wooden stick and walked to the side of the tile pot, just like when he was a child, he squatted more than a meter away, and carefully stretched the burning wooden stick into the pot and poked it lightly in the black gunpowder, but there was no reaction.

"Haha, Ridian is fooling me again, I'll just say it's impossible!" Wang San laughed proudly.

I'm going, what's going on?

Chen Xu felt a little numb, couldn't those white powders be potassium nitrate? So he stood up with a confused face, but because he had the experience of being bombed in a cannon battle when he was a child, he still didn't dare to get too close.

"Why should Ridian be so cowardly, let me help!" Wang Wu handed the big sword to Wang Qi next to him, reached out and grabbed the fire stick in Chen Xu's hand and squatted next to the clay pot, and very rudely stirred the burning wooden stick in the gunpowder a few times.

"Boom~"

A fierce firelight accompanied by a cyan smoke rose into the air, instantly submerging Wang Wu.

"Ah~" Wang Wu let out a ghost howl, covered his face, and lay on the ground with a pop, and the sudden change also made Wang San, Wang Si and Wang Qi, who were about to laugh at Chen Xu, scatter in a panicked manner, and the big sword in Wang Qi's hand was thrown to the ground in fright, and he hid more than ten meters away and trembled in the door holding the pigsty.

"What happened?" Yu Wuya jumped out of the room in disheveled clothes and cloak, and pulled out the meteorite sword with a choking sound, and looked around blankly.

In Chen Xu's opinion, the movement generated by the explosion of gunpowder is not too big, except for the fire and smoke, the sound is not as good as a small firecracker, but for these primitive people who have not seen the world, it is completely as terrifying as divine thunder.

"Chen Lang, what's going on?" Shui Qingrou was dressing up in the room, and she ran out in a panic with a comb in her hand, and she was relieved to see that Chen Xu was fine.

Followed by Chen Jiang and Xing'er, even Yu Ji ran out barefoot.

"Wahahahaha......" Chen Xu couldn't help but laugh heartily.

Nima dropped a gourd scoop, and the gunpowder was finally researched by Lao Tzu, although it was not easy to ignite, but it was undoubtedly the real gunpowder.

Chen Xu's smiling face was about to bloom, and he strode to the side of the tile basin and gently patted Wang Wu, who was lying on the ground like an ostrich.

"Ah, the gods spare their lives~" Wang Wu shouted tremblingly.

"Hurry up, the gods are gone!" Chen Xu said with a smile.

"Really?" Wang Wu cautiously raised his head, and then everyone saw a big black face that had been smoked, with traces of burnt hair, and small holes in his clothes that burned gunpowder, and the whole person was white except for his teeth, as if he had just been dug out of an earthen kiln.

Rushing Wang Wu to wash his face and wash his hands and change clothes, Chen Xu squatted down and took a closer look at the tile basin, which was still intact, the entire basin had been smoked black, and there were obvious traces of burning at the bottom of the basin, and there was still a lot of black powder and some sand left.

"Engong, what were you doing just now?" Yu Wuya put away the iron sword in confusion, walked over and squatted on the side of the tile basin and asked curiously.

"I just researched a gunpowder to make the Nine Heavens Divine Thunder, Wang Wu was very brave to help test it, although the effect is not very good, but I am still very satisfied!" Chen Xu said with excitement on his face.

"Nine Heavens Divine Thunder? Could it be immortal? Yu Wuya was shocked.

"Hehe, sort of, this thing is fierce and domineering, if it is really made, a thunder will go down and there will be no chickens and dogs left within a radius of dozens of feet, hurry up and eat, and follow me to Qinghe Town after eating......" Chen Xu stood up contentedly with the clay pot.

……