With the continuous development of technology

Production of synthetic diamonds in the world, especially in China

Will increase year by year

Is the diamond no longer natural and will be "always long"?

"This eight-hearted and eight-arrow diamond ring is better in clarity and color. It uses the world's top cupid cutting technology, which represents each other's love, sweetness and pledge, no matter which angle you can see its dazzling light. If you buy now, we will have some promotions." Under the strong recommendation of the sales staff, Li Jiaxin's boyfriend finally chose this expensive 1 carat diamond ring and gave it to her as a wedding gift. Li Jiaxin had a wish since childhood, that is, wearing a white wedding dress, wearing a dazzling diamond ring, entering a fairytale world, now, her dream can finally be realized.

The English name of the diamond comes from the Greek adamas and the ancient Roman dimas, which means “invincible” and represents the strength of strength and invincibility. For a long time, diamonds have been a symbol of power, status and wealth. The world’s largest diamond, the “African Star”, is embedded in the Queen’s Scepter. In modern people's hearts, diamonds as a love token and marriage promise, representing eternal love and loyalty, is an important way for both sides to express their feelings.

However, a recent report from the South China Morning Post said that "more and more synthetic diamonds are being 'planted' from Chinese laboratories, threatening the living space of natural diamond giant De Beers." In the billion-dollar diamond market, De Beers also finally put aside its previous sniper attitude towards synthetic diamonds. In September 2018, it launched its own synthetic diamond brand "Lightbox Jewelery", which marked the diamond market will enter a new era.

With the continuous development of synthetic diamond technology, more and more people are turning their attention to this blue ocean. Jia Xiaopeng, director of the State Key Laboratory of Superhard Materials at Jilin University, told China News Weekly that “synthetic diamonds are grown in the laboratory, but like natural diamonds, they are made up of carbon atoms and have the same physics. Attributes and chemical composition, even less than natural diamond impurities, more pure, and cheaper."

If a scarce diamond can be copied manually, will it still have such a noble identity and worth? Will it be the representative of eternal love? What impact will this have on the diamond industry?

Artificial diamonds are coming

In May 2015, the Shenzhen Laboratory of the National Jewelry Quality Supervision and Inspection Center in a group of ruby ​​jewelry diamonds found that some small particle samples contained a large number of black dot-like and cloud-like inclusions, so the inspectors The inspection process of complex samples was carried out by infrared spectrometer test, ultraviolet-visible spectroscopy test, fluorescence observation, Raman scattering spectroscopy test, photoluminescence spectroscopy test, etc., and finally, the set of ruby ​​jewelry was set with diamonds. There are five high temperature and high pressure synthetic diamonds. Previously, the central laboratory found a total of seven samples of unspecified small particles of high temperature and high pressure synthetic diamonds, indicating that colorless high temperature and high pressure synthetic diamonds have begun to enter the jewelry market.

In fact, synthetic diamonds are not a new technology. As early as 1953, Swedish Electric Company successfully synthesized 40 small diamonds with high temperature and high pressure technology, but it was not publicly announced. In 1955, General Electric Company successfully synthesized small grain diamonds by static pressure melting method; 1959 In the year, De Beers successfully synthesized diamonds using epitaxial growth technology. Since then, the synthesis technology of industrial grade diamonds has been widely used and gradually began commercial production.

Developed countries all over the world have made synthetic diamond technology the focus of their development, because this represents a certain level of scientific and technological development of a country. “Artificial synthetic diamonds can process any material. Cutting marble is as easy as cutting tofu. With its own light and heat, it can also process ultra-precision mirror parts such as nuclear reactors and spacecraft navigation gyros.” Jia Xiaopeng said, “synthetic diamonds Still a good material for semiconductors."

"The current computer temperature will be high when it is high, because its semiconductor materials are not heat resistant. At room temperature, synthetic diamond is the material with the highest thermal conductivity, and it is chemically stable. If it is applied to a computer CPU, it can not only solve the problem. These problems can also unlock the foreign blockade of China's semiconductor technology." Taizhou Drilling Technology (Zhengzhou) Co., Ltd. Chairman Yuan Zhongzhong told China News Weekly.

In the past, synthetic diamonds have long been used in traditional fields such as oil exploration and mining, as well as high-tech fields such as semiconductors and aerospace. Why have they suddenly appeared in the jewelry consumer market in recent years? "In fact, this is not difficult to understand. Now China's synthetic diamond technology is quite mature, and it can produce larger particles of colorless diamonds. Unlike previous technologies, it is not good enough to synthesize diamonds for jewelry. In addition, the current value of jewelry diamonds is higher. This also attracts synthetic diamond producers to enter the jewelry market.” Shan Chongxin, dean of the School of Physics and Engineering at Zhengzhou University, said.

In the words of Shan Chongxin: artificial diamond technology has not been used in the field of jewellery for a long time, mainly because the technology is not relevant. Jia Xiaopeng also said, “The reason why the colorless diamonds with high purity were not synthesized before is because the synthesis technology is not enough, including raw materials, experimental environment, formula, process flow, etc., each point is a little inaccurate and will be the quality of diamonds. It has a very big impact."

In 1970, the United States General Electric Company successfully synthesized large-grain gem-quality diamonds through improved technology, but since the cost of synthetic manufacturing is much higher than the price, it has not been mass-produced. Over the past 30 years, Japan, Russia and other countries have also successively synthesized gem-quality diamonds, but they are all slightly yellow. The cost of gem-quality synthetic diamonds is high, and mass production is still not possible.

According to Dai Lidong, a researcher at the Institute of Geochemistry of the Chinese Academy of Sciences, China’s first artificial fine-grain diamond was born in 1963. It was developed by the Institute of Geochemistry of the Chinese Academy of Sciences, the Institute of Physics of the Chinese Academy of Sciences, the Zhengzhou Sanmao Institute and the Academy of Geological Sciences. Out. After more than forty years, although the technology has continued to improve, the synthetic diamonds contain more impurities, yellow, brown or opaque, and the synthesized diamonds belong to the middle and low-end products.

In 2005, the State Key Laboratory of Superhard Materials of Jilin University synthesized 4mm Type IIa diamonds. Although the diamond particles are large, but they are not extremely pure, the colorless synthetic diamonds that can be cultivated with high purity are at the end of 2014. .

Dai Lidong said that at present, only a few countries in China, the United States, Russia and Japan have mastered synthetic gem-quality diamond technology. In the production of synthetic diamonds, foreign countries generally use two-sided presses, while China uses a six-face press, which produces a three-axis pressure that is more conducive to synthetic diamonds than the uniaxial pressure on both sides. Growth, therefore, China's self-developed six-sided top press has certain advantages in the field of artificial diamond production. Since 1965, China has been designing and manufacturing six-sided top presses. Today, the entire domestic industry is in use, and many foreign manufacturers have also introduced them.

There are two techniques for synthesizing diamonds, one is high temperature and high pressure. This method is the most widely used, but this process uses a catalyst to incorporate diamond into the impurities, so most of the diamonds produced are used in the industrial field. The other is chemical vapor deposition. This method will result in a diamond of high purity due to the absence of catalyst.

Jia Xiaopeng explained that, considering the cost, high-temperature and high-pressure methods are generally used to produce medium- and high-quality diamonds below 1 carat, and chemical vapor deposition is suitable for growing large-grain diamonds above 1 carat. This is because high-temperature and high-pressure synthesis of large-grain diamonds is costly. In chemical vapor deposition.

Many experts pointed out that in terms of technology, there are still gaps between China and the United States, Japan and Russia. There is no essential difference between the US, Japan and Russia and China's diamond production technology, but there are differences in technical details such as raw materials, formula, pressure transfer medium, heat transfer medium and pressure accuracy, temperature control accuracy, etc. The specific situation is unknown, because Synthetic diamond technology is strictly confidential in all countries.

Dai Lidong told China Newsweek. "At present, Japan should do the best. The United States is also learning this synthetic technology from Japan. Japan produced consumer-grade synthetic diamonds in 1995, but Japan did not It is industrialized and is only tailored to its own needs."

Jia Xiaopeng pointed out that “the synthetic diamonds synthesized by these two methods are almost the same as natural diamonds. Synthetic diamonds and natural diamonds are true diamonds. But in a strict sense, synthetic diamonds and natural diamonds have different nitrogen content. The difference in form is the biggest difference between synthetic diamonds and natural diamonds."

In fact, the process of making artificial diamonds has been very advanced, even if the experts need special equipment to distinguish them. Jiang Wenyi, a senior lecturer at the National Jewelry Quality Supervision and Inspection Center, explained that “the molecular structure of synthetic diamonds is not a complete octahedral structure of natural diamonds, but a complex structure. After being placed in a diamond viewer, it will be very strong. Phosphorescence phenomenon."

Artificial diamonds made in China

To date, less than 10% of synthetic diamonds worldwide have been used as jewellery, while the vast majority remain largely in the industrial sector. However, with the depletion of the world's diamond resources and the difficulty of mining, it is difficult to effectively fill the capacity gap, coupled with the continuous advancement of synthetic diamond technology, synthetic diamonds have become an inevitable trend towards the jewelry market.

Morgan Stanley’s “Diamond Game in Global Perspectives: Synthesis and Naturals” report states that synthetic diamonds will account for 15% of the small-grain diamond market and 7.5% of the large-grain diamond market in 2020, with market value Breaking through $2 billion.

In July 2018, in the latest jewellery guide, the US Federal Trade Commission revised the definition of diamonds that had been used for 62 years, removing the word "natural." This shows that the recognition and acceptance of synthetic diamonds undoubtedly injected a shot in the synthetic diamond market.

Although China still has a gap with developed countries in the most advanced artificial diamond technology, China is already a global giant in terms of production volume. In 2017, China's synthetic diamond production was about 25 billion carats, accounting for more than 90% of the world's total. It has dominated the market for 15 consecutive years. Henan Province is the manufacturing center and distribution center of the national synthetic diamond industry.

Li Hongbo, general manager of Luoyang Aimer Diamond Co., Ltd. of Henan Province, told China Newsweek that “it is only the beginning. In the future, with the development of synthetic diamond technology and increasing market acceptance, the production of synthetic diamonds will increase year by year. ”

“At present, there are 7,000 six-face presses in China, which were originally used to produce diamond abrasives. In recent years, with the continuous improvement of the quality, cost and particle size of synthetic diamonds, it is possible to produce medium and high quality large particles at very low prices. Finished diamonds, there are only a few hundred six-sided presses in the production of white diamonds for jewelry, in the future, the market needs to be able to start thousands of machines for production at any time." Tai Chi Technology (Zhengzhou) Co., Ltd. Chairman of the Board Said in the middle.

In the face of China's huge production pressure, De Beers plans to invest $94 million in the construction of a synthetic diamond production plant in the next four years, and sell its Lightbox Jewelry synthetic diamonds for 1 carat for only $800 (usually, 1 carat) Natural diamonds are priced at about $8,000. Previously, De Beers also insisted that it only sells natural diamonds and does not sell laboratory synthetic diamonds.

"The South China Morning Post" said, "Dybils is worried that its bottom line is eroded by China's large-scale production of synthetic diamonds. Therefore, after spending decades to suppress and reject the synthetic diamond industry, it finally changed its strategy."

“In fact, as early as the 1950s, De Beers set up Element 6 to develop synthetic diamond technology, but because of its long-term monopoly of natural diamond resources, it claimed to sell only natural diamonds.” Yuan said that “wearing When Beers found that it took decades to block the development of the synthetic diamond market, instead of losing the market, it was better to quickly enter the market and become a leader in market competition. On the one hand, it could gain control of the market; On the one hand, it distinguishes laboratory synthetic diamonds from natural diamonds at a lower price, and maintains its position in the natural diamond market."

Yuan Zhizhong believes that the synthetic diamond market is as unstoppable as the trend. Once the market enters a large number of synthetic diamond products, it will inevitably have a certain impact on natural diamonds. Small particles of natural diamonds need to be reduced in order to survive. Large-grain natural diamonds It is more precious as it becomes more and more scarce. In the future, as the production of natural diamonds continues to decrease, synthetic diamonds will slowly fill the gap and eventually completely replace natural diamonds.

According to statistics, the price of natural rough diamonds has dropped by 20% compared with the 2011 high, while the cost of synthetic diamonds has steadily declined. Zhu Li, general manager of Zhongtan Jewelry, said, "Diamonds are used to distinguish between classes. Diamonds are cheap, and high-level ones will not buy them."

“If synthetic diamonds are exactly the same as natural diamonds and they are cheaper, why not buy synthetic diamonds?” Li Jiaxin said, “I will buy synthetic diamonds in the future as a commemorative gift for my wedding anniversary.” In April 2018, MVI Marketing A consumer survey conducted by the millennium shows that millennials are showing increasing interest in laboratory synthetic diamonds, with nearly 70% of respondents expressing their willingness to purchase laboratory synthetic diamonds and use them as Book a wedding.

It is reported that Swarovski, Chow Tai Fook and other jewelers have also launched a series of synthetic diamond jewelry, American actor Leonardo DiCaprio, Warren Warren Buffett, Twitter founder Evan William and others They have also begun to invest in synthetic diamonds. Even Airbnb, known as a tourist home, has invested $70 million in this area to build a synthetic diamond production plant in China.

In addition to the natural attributes of beauty, sturdiness and rarity, the other social and cultural significance of diamonds is extended on this basis. In the 1940s, in order to promote diamonds, De Beers used marketing methods to tell people that “diamonds are women’s best friends”. Later, “A Diamond is Forever” (a long-lasting diamond, a eternal rumor) was put forward. With the continuous broadcast of TV, radio and outdoor advertising, this slogan is deeply rooted in the hearts of the people. People began to believe that diamonds are the equivalent of eternal love. It is from this time that De Beers has established the status of diamonds as a token of love, and that diamond rings have become an indispensable item in weddings in countries such as Japan where there is no previous concept of wedding ring.

In the view of Shan Chongxin, diamonds are not symbols of class distinction. "When the old Wang Xietang was in front of Yan, flying into the homes of ordinary people," with the advancement of synthetic diamond technology, in the future, people will use more diamonds in their daily lives. For example, in the past, clothes will not be equipped with diamonds, but in the future, they may be on the cufflinks. It can be matched, and the crafts can also be set. In particular, the millennial generation pays more attention to beauty and fashion, which brings a broad market space for artificial diamonds.

Magnetic Channel Assembly

 Description

Neodymium Channel Magnet has 65 lb holding power, a strong magnet encased into a nickel plated steel channel with adhesives.Steel and magnet will concentrate a magnetic circuit which enlarge the holding force to 65 lbs at the bottom of the magnetic circuit. The steel channel also protects the magnet from being damaged when frequently used.There are two axial holes on the steel so someone can easily fix it onto a wood or plywood shelf or metal cabinet,door or fence.

The 65 lbs holding power is direct pull force when directly attract to a thick steel surface.The great holding strength of 65 lbs is used to hold many things. Vehicle license plate,banner or sign, door,cabinet...A strong Neodymium Magnet is set into a plated steel channel with holes or threaded nuts for mounting.

 About Neodymium Magnets:

Neodymium magnet is one of rare earth permanent magnets. Neodymium magnet is also known as Ndfeb Magnet , or neo Rare Earth Magnet. Since it's very strong, people also simply call it Super Strong Magnet or super powerful magnet.

Neodymium magnet,also known as strongest rare earth magnet,was a magnetic alloy which magnetism could exist for more than 60 years, thus neodymium magnet is also be called as strong Permanent Magnet . The main element of the magnet include neodymium (Nd), iron(Fe) and boron(B),so people also call them NdFeB or Nd2Fe14B.

Since neodymium magnets are very easy to get corrosion,thus surface plating is important,The surface treatment of the neodymium magnet is triple NiCuNi coating which is heavy and thick duty.

Neodymium Channel Magnet

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NINGBO SHINE MAGENETIC TECHNOLOGY CO.,LTD , https://www.shinemagnets.com