In Jinan Zhongwu New Materials Co., Ltd., Wang Haofu showed reporters a bunch of diamonds. These diamonds are crystal clear and can't be seen with natural diamond rough. However, some of them are made of human hair.
In China, in the past, because synthetic diamond particles were too small, they could only be used in industrial abrasives. Nowadays, diamond particles have become larger and become functional materials, which will inject new kinetic energy into many fields. As a super-hard material and the ultimate semiconductor material, large-grain diamond has important applications in industrial processing, optical instruments, semiconductors, etc., and can play a role in aerospace, power transmission, radar, guidance and Other fields.
"Because of good light transmission, optical devices, missile rocket windows, can also do semiconductor research. There will be breakthroughs in the field of diamond semiconductors, solving some problems that cannot be solved due to semiconductor heat conduction, such as charging piles for electric vehicles. With the use of diamond semiconductors, this heat is quickly exported, greatly shortening the working time of the charging pile and achieving rapid charging." Wang Yufu told reporters.
Under the joint cooperation of the competent departments of science and technology of Shandong Province and Jinan City and Shandong University, the Sino-Ukrainian Institute participated in the joint establishment of the Shandong Institute of Industrial Research, the Wide Band-Gap Semiconductor Collaborative Innovation Center. At the same time, the company has established a complete crystal processing and semiconductor application development platform through cooperation with Shandong University. A technological innovation line that spans production, learning, and research has been highlighted by “enterprise-oriented, market-orientedâ€.
These diamonds, called "life diamonds", were formed by graphitizing the carbon in the hair after technical conversion at a temperature of more than 1,500 degrees and 70,000 atmospheres. In the jewelry industry, “life diamonds†have a new meaning.
"For example, if a child is born, the baby's hair, the first hair cut, can be made into a diamond, reserved for commemoration, the young man is engaged in marriage, can put the two people's hair together, we make a diamond, now Supply to the market in batches," said Wang Yufu.
Maybe for us, hair is a bit magical, but for Wang Haofu and his team, this is not difficult. Because the hair contains carbon, as long as it can be converted into graphite, it can be grown into diamond by technological transformation.
However, it is difficult to produce large-grain diamonds and form industrialization.
From 0.2 carats to 10 carats, behind the failure after repeated failures
Wang Yufu is the chairman of Jinan Zhongwu New Materials Co., Ltd. He is a worker of metallurgical machinery who has worked as a grinding wheel factory. He has been a listed company CEO and finally embarked on the emerging industry of exploring new materials. In July 2010, Wang Yufu followed the Sino-Ukrainian Science and Technology Park in Jinan High-tech Zone and went abroad to discover synthetic diamond technology in Ukrainian superhard materials. However, at that time, the technology remained at the laboratory stage, and Wang Haofu decided to introduce this not mature technology.
In the production process, how to maintain the temperature gradient and pressure to simulate the underground growth environment has become the biggest problem of this technology.
"Because the diamond is growing, its cavity is reduced, the pressure will be reduced, how to automatically fill the pressure to maintain the normal constant pressure inside? After four years of research and development, our technical team is close to mental breakdown twice. However, when I don’t want to do it, for example, I remember that I failed to do the experiment and lost one part of the machine. One is 6000 yuan, and the other 8 is 48,000. No one can stand it for several times."
Wang Yufu said that the original technical team experimented in a rented house that did not have a flush toilet. It invested 13 million yuan, failed again and again, and fumbled again and again. It was four years, and finally they succeeded.
From the beginning of the project to the present, Wang Yifu and his team cooperated with the Institute of Superhard Materials of the National Academy of Sciences in the past seven years, focusing on technology research and development, and produced "fruitful results". Synthetic diamond can only grow up to 0.2 carats and expand to a maximum of 10 carats. The company produces more than 60,000 carats of large-grain diamonds per year. The products are used in jewelry, cutting tools, optical instruments, etc. It is the only one in China that can produce Ib and IIa at the same time. , IIb type large grain diamond enterprises, technology has reached the international leading level.
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