Diamond has excellent properties and is widely used downstream. Diamond is a product refined from diamond. It is also the hardest and simplest gem in the world. It is a natural crystal with a cubic structure of carbon. Natural diamonds in nature are formed from carbon at depths of about 100 miles below the surface at pressures of 4.5-6.0gpa and temperatures of 1100-1500℃. In more recent times, scientists have produced synthetic diamonds by simulating the conditions in which diamonds grow in the laboratory and by improving techniques.
As a gem with strong refraction and high dispersion, diamond occupies a place in luxury jewelry. ในเวลาเดียวกัน, it has the advantages of thermal, optical, electrical, acoustic and chemical properties, such as high strength, high sensitivity, high light transmittance, high power, high thermal conductivity and high electron mobility. Widely used in building materials, stone, exploration and mining, machining, clean energy, consumer electronics, semiconductor and other fields. Artificial diamonds are widely used in industry. As a new choice of diamond consumption, diamond planting is mainly used to produce all kinds of fashion consumer goods such as diamond jewelry.
Grown diamonds are no different from natural diamonds, พวกเขาเป็นเพชรแท้. Cultivated diamonds are identical to natural diamonds in terms of physical properties (โครงสร้างผลึก, ดัชนีการหักเหของแสง, dispersion index, ความแข็ง, ความหนาแน่น, เป็นต้น) and chemical composition (carbon C). Accordingly, เพทาย (เซอร์โคเนียลูกบาศก์), carbon silica (ซิลิคอนคาร์ไบด์), white sapphire, rutile, spinel, ฯลฯ. are very different from diamonds in physical properties and chemical composition, and belong to fake diamonds.
China is leading the way in developing gem-grade diamonds through technological breakthroughs. Diamonds are scarce in nature, concentrated in South Africa, Russia and elsewhere. Since the 20th century, the demand for diamonds in mining, drilling, precision machining and other industries has increased significantly. Limited by the technical level, the synthetic quantity of industrial diamond was once a symbol of the comprehensive industrial strength of a country, and artificial diamond is also known as the industrial Pearl. ใน 1953, Swedish GENERAL Electric Company ASEA successfully produced diamond crystals below 1mm. ใน 1964, the Chinese Academy of Sciences successfully synthesized artificial diamond for the first time with a 200-ton double-sided press. ใน 1965, China successfully developed the six-side top press, which gradually became the leading diamond synthesis equipment in China. By 2021, China has topped the world in diamond synthesis for 18 consecutive years.
ใน 2013, CVD diamonds gradually entered the jewelry market. Following a breakthrough in the technology, the lab began to continuously identify CVD cultured diamonds of more than 1 carat in 2015. From 2015 ถึง 2016, surplus diamonds made a breakthrough in producing 1-3 carat rough diamonds, which can be processed into bare diamonds of less than 1 กะรัต. ใน 2018, Zhongnan Diamond and Yellow River Cyclone broke through the rough processing technology of 3-6 carats and began mass production, which means that China has reached the world’s leading level in diamond production.