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Although, as a major producer and consumer of synthetic diamonds in the world, China has many diamond manufacturers, but most of them use small-tonnage six-face presses for production, and the output of the products is low and the grades are poor. In recent years, with the continuous expansion of the application fields of diamond tools, China's technical level in this field has also been continuously improved, showing great room for development.
Current status of patents: weak but steady growth
Since the implementation of the Patent Law in 1985, China has applied for more than 800 diamond-related patents worldwide, while the foreign diamond industry has obtained more than 11,000 patents. Cubic boron nitride (CBN) is a synthetic inorganic crystalline material with hardness second only to diamond. It is widely used in the machining industry and functions similarly to diamond. Developed countries have developed CBN as an important material for high efficiency, energy conservation, ultra-precision and automated processing. Since the 1980s, foreign countries have obtained a large number of patents in the preparation technology and application of CBN, especially in the production technology and technology of high-grade cubic boron nitride single crystal and its products. China's global CBN patents obtained between 1985 and 2003 were only 2.6% of the number of foreign patents.
Nevertheless, from the overall situation of China's diamond patent applications, the situation is still relatively optimistic. For example, from the perspective of patent composition, most of them are invention patents, which indicates that their technical content is relatively high.
From the research direction, most of the special physical and chemical effects obtained by researching diamond products and using diamonds are concentrated in the production process of saw blades, drill bits and diamond thick films and films, followed by diamond production processes and equipment. Research, research on raw and auxiliary materials for diamond production and research on sorting and purification of diamonds indicate that the research field is more concentrated and is conducive to breakthrough success in a certain field.
From the point of view of the number of patent applications, before 1995, the number of Chinese patents applied by domestic enterprises increased year by year, and decreased slightly after reaching the peak in 1995. However, the annual application volume is relatively stable, reflecting the growing maturity of China's diamond industry from one aspect.
Judging from the operation mode of patent application, nearly half of the patent applications adopt the method of entrusting the patent office, which guarantees the quality of the patent application documents of China's diamond industry to a certain extent, marking the patent application and protection of China's diamond industry. It is gradually moving towards specialization and standardization.
Technical comparison: the gap is large and the space is large
China has shortcomings in the synthesis of diamond technology, high-grade diamond single crystal synthesis technology and technology, high-quality diamond products, diamond film, nano-diamond, diamond sorting and detection, as well as huge patent development. space.
At present, two-sided top presses have been widely used in foreign countries to synthesize diamonds. There are many patents in the equipment and process of double-face press machines, and the market share of high-grade diamonds is also high, basically controlling the international market of high-end products. China is still in the development stage in this respect, and there are still many shortcomings in the process technology, and there is a considerable gap between it and developed countries.
In the production of high-grade diamonds, China has made great progress, and some products have approached or reached the level of similar foreign products, but the number of varieties produced is still quite limited.
In terms of diamond products, although China's diamond patents are mainly concentrated on diamond products and their mechanical products, their product quality is basically in the middle and low grades, especially in the high-tech products, there is still a big gap with foreign countries. Therefore, China has considerable space for patent development in the application and development of specialized tooling products and diamond products in traditional industries. Representative industries such as: automotive industry, hard and brittle non-metallic materials processing, wood products and plastic products processing, application development of various polycrystalline products.
In the synthesis of large single crystal diamonds, China also has a lot of room for development. At present, many scientific research institutions and institutions of higher learning in China are actively carrying out work in this area, and have also made great progress.
In the research of preparation methods and process technologies for preparing diamond thick films by various methods, great progress has been made in China. Some of the research results of large-area deposition of diamond thick film technology have reached the international advanced level and can form a mass production scale. The development of diamond film tools is a common issue at home and abroad. Therefore, how to improve the process technology and produce diamond thick film with high toughness to promote its application in tools is an important development direction in the future. There is still much room for development in patent research in this field at home and abroad.
China's research and application of nano-diamonds has basically maintained a trend of simultaneous development with foreign countries. It can compete effectively with foreign counterparts in the preparation technology and product application development of nano-diamonds.
There is still a gap between the high-quality and low-grade diamond sorting technology in China and the world's advanced level. As a result, a considerable amount of high-grade diamond remains in the low-grade diamond, which makes some high-grade diamonds sell at low prices, affecting enterprises. Economic benefits. Therefore, there is also room for patent development in this technical field.
In view of the current problems in the diamond industry, experts suggest that China's diamond industry should further strengthen cooperation and cooperation in the industry, carry out research and development work in a targeted manner, and jointly develop and develop China's core technologies under the premise of circumventing foreign patent technology barriers. And form independent intellectual property rights to protect. Establish and improve the patent work system in the industry and form a synergy in the whole industry.
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Synthetic diamond is a kind of super-hard material. It is widely used in machinery, electronics, medical equipment, geological drilling, aviation, aerospace and other fields, and has broad application prospects. Western developed countries even regard it as a strategic resource, and its synthetic equipment and processes are important indicators to measure the level of a country's basic industry. In recent years, with the gradual recovery of the world economy, the economic growth of the world's major industrial countries has increased significantly, and the demand for industrial diamonds has gradually increased.