On April 15, in the electric power laboratory, amid the admiration of dozens of officials and laboratory researchers, the light bulb that Li Zhi had placed with his own hands lit up. Pen ~ fun ~ pavilion www.biquge.info

Li Zhi asked all the curtains to be closed, and the room was still very bright. Li Zhi estimated some and felt that the world's first light bulb had at least thirty watts of power.

Although this brightness is not enough and needs to be improved, it is far beyond the candles and oil lamps of this era.

Lee Sik is a light bulb made of tungsten filament.

Tungsten was extracted in 1783 and is an eighteenth-century technology, not much high-tech. At that time, the Spaniard Depurya used the carbon oxidation method, that is, the reaction of carbon and tungsten trioxide was used to obtain tungsten metal and carbon dioxide.

Li Zhi used the same method.

But the difficulty of the operation is to obtain pure tungsten concentrate. The first is prospecting. Three years ago, Li Zhi asked Han Jinxin to look for tungsten ore in Xianglu Mountain, Xiushui County, Jiangxi Province -- Li Zhi knew that there was a large tungsten mine because of a case designed by a light bulb before Li Zhi crossed over.

After knowing the specific address, it is not difficult to find ore, and the trouble is the selection of wolframite. After the crude tungsten ore is excavated, it should be crushed and ball-milled, and then the shaker gravity separation, flotation and electric separation should be carried out to obtain tungsten concentrate ore dominated by tungsten trioxide. With tungsten concentrate ore, sodium carbonate sintering and decomposition are necessary to further remove impurities, so as to obtain relatively pure tungsten trioxide.

Although Li Zhi had learned some theories of purifying tungsten ore before crossing over, it was also difficult to practice. It took hundreds of researchers in the electric power laboratory three years to study this whole set of purification work. More than 200 kinds of machinery were built alone, and the cost was tens of thousands of taels of silver.

After tossing for three whole years, Li Zhi summed up a complete set of chemical theories in practice, and Li Zhi obtained a relatively pure tungsten trioxide.

After obtaining tungsten trioxide, it is easy to extract tungsten metal, and it is even easier to make electric light bulbs.

The researchers were stunned by the dazzling light emitted by the light bulbs. Although they have been busy in the laboratory for the past three years, they never imagined that they could finally produce such a magical electric lamp according to the design and operation of Tianjin Junwang.

Some researchers felt that three years of hard work had not been in vain, and wept with joy and cried in the laboratory.

Everyone looked around the light bulb for a long time, and their faces were very happy.

Cui Changwu, the head of the discipline inspection team, took a breath and praised: "Your Highness, this is really the miracle of poor creation. That's a lot brighter than an oil lamp! ”

Carefully touching the light bulb, Cui Changwu said: "It's not as hot as a flame, and it won't be as easy to cause a fire as an oil lamp." ”

Cui Changwu even put his nose up and sniffed it, and said with a smile: "Lord Wang, Shengming, this light bulb has no smell, unlike the oil lamp, which smells very strong, and emits black smoke, which will blacken the walls." ”

He said: "Nowadays, the factories in Fanjiazhuang and Tianjin Acropolis are off work at night, and the roads are dark at night, making it very inconvenient for pedestrians to walk on the road. The officials on the street were also dutiful, installing glass-encased tung oil lamps for pedestrians, but the sparkling light of the tung oil lamps illuminated too little. ”

"This is the good security of Fanjiazhuang and the Acropolis, so it is only an inconvenience to the workers and female workers, and there is no danger yet. In other cities, especially in the newly incorporated provinces, it is dangerous for women workers to leave work too late. ”

"But if you can put this light bulb invented by the prince on the road, the whole road will be open. Not only do the workers no longer have to endure the pain of touching the dark, but the safety of the female workers has also been greatly improved, and they no longer have to worry about encountering robbers or even gangsters. ”

When everyone heard Cui Changwu's words, they all said wonderful.

Lu Hu thought for a moment and said with a smile: "Chief Cui said it very well. However, this light bulb uses electricity, and it needs to be near the generator to light up, how to solve this problem? ”

Li Zhi said with a smile: "Although the light bulb uses the electricity of the generator, now we can produce insulated wires, and we don't need to put the light bulb next to the generator." ”

When everyone heard this, their faces were even more happy, and they all looked at Li Zhi with anticipation.

Li Zhi waved his hand and asked the research institute of the laboratory to take out a few sections of insulated wires.

The insulated wire is copper-core, and in the middle is a thin copper wire. The copper wire is coated with vulcanized rubber.

Rubber has good insulation, good thermoplastic properties, and can be easily processed into various shapes after heating, which is an ideal material for wire sheath.

Li Zhi smiled: "With this kind of wire, we can transmit the electricity generated by the generator to a very long distance. I see that to light up the streets and alleys of Fanjiazhuang, we only need 20 generators. ”

Twenty generators are powered by twenty steam engines, and some coal or firewood is sufficient. This is much less expensive than having a full oil lamp on the street.

It seems that the cost of electricity for this lamp is not high.

When everyone heard Li Zhi's words, they were amazed. They picked up the black vulcanized rubber wire and looked closely at it in the light of the light bulb.

Huan Yihua thought for a while and asked, "Lord Wang, according to Lord Wang's meaning, this light bulb does not use electricity very much." Can it be used not only in critical places, but also in ordinary places? ”

Huan Yihua, as the general manager of the newspaper, is in great need of lighting tools.

Every day, when the newspaper collects news, it gets it late. Then I had to rush to typesetting and printing in the middle of the night, and print the newspaper before dawn. It is very inconvenient to operate flammable newspapers under a dim oil lamp. It can be said that the editors and printers of the newspaper are night owls, and there is a great need for improved lighting tools.

This electric light is almost tailor-made for newspapers.

Huan Yihua grinded his palms and said with a smile: "Can the prince equip newspapers everywhere with this electric light?" ”

Li Zhi laughed and said, "Yes, the newspaper office stays up late every day, of course, it has to distribute lights." ”

Huan Yihua's face was happy, and he immediately shook the ground and shouted at the prince.

Li Zhi smiled and said, "Not only the newspaper office needs to distribute lights, but our schools also need to distribute lights." The students read books at night until nine o'clock, and relying on oil lamps was too hurtful for their eyes. There are more and more myopia in our schools now, which is not a good thing. ”

"We're going to set up large generators in various places to deliver power to key sectors with wires. It is necessary not only to light up the roads, but also to light up schools, yamen, newspapers, and even the rooms of every household. ”

Putting an electric light bulb on the table in his hand, Li Zhi said, "With the light bulb, we can conquer the night." In the future, our people will no longer have to live a day of black light touching the fire. The four hours from 6 p.m. to 10 p.m. are no longer useless hours when you can't get down to business. ”

All the officials bowed to Li Zhi in unison and shouted: "Lord Shengming! ”