Silica is an inorganic, non-metallic mineral functional material powder is processed from natural quartz, fused silica primary raw materials, crushing, grinding, precision grading process from multi-channel.
1. Silicon micropowder industry layout
The silicon micropowder industry is a capital, technology and resource-intensive industry. Its industrial layout is closely related to the supply of raw materials and the downstream market , mainly concentrated in economically developed regions and areas rich in raw materials.
China's quartz sand resources are mainly distributed in Fengyang, Anhui Province, Donghai, Jiangsu, southwestern Guangxi, and northwestern Hainan.
The downstream application market of silicon micropowder in China is mainly concentrated in the economically developed regions such as East China and South China. Therefore, the domestic production of relatively strong silicon micropowder is mainly concentrated in Lianyungang, Anhui, Fengyang, Anhui, Huzhou, Zhejiang, etc. , including Donghai County, Jiangsu Province. It is China's largest silicon micropowder production base, and is also the earliest in China to engage in the research, development and production of electronic grade silicon micropowder.
2. Profit of silicon micropowder industry
From the perspective of the industrial chain, the profit level of the silicon micropowder industry is affected by the development of raw materials such as quartz stone, fused silica and downstream application industries.
Since 2016, the country's copper-clad board industry to pick up more and more relevant EMC, adhesives and other industries continued strong demand, domestic silica powder manufacturing technology updates faster, thus driving the rapid increases in market size and efficiency of silica powder products.
At the same time, the profit level of the production enterprises in the industry is quite different . The company has strong R&D strength, advanced technology equipment and process control core technology, and can produce high-quality products and large-scale operation. The profit is stable and the profit level. Generally higher.
3, the size of silicon micro-powder enterprises
(1) Most of the township enterprises
From the perspective of the scale of industrial enterprises, although China is rich in quartz and has a wide distribution of mineral resources, there are nearly one hundred small and medium silicon powder factories in the country, but they basically belong to township enterprises .
Because most of the production enterprises are small in scale and single in variety, the conventional processing equipment of non-mine industry is adopted, and there is no systematic control means in the process. The purity, particle size and product quality stability of the silicon micropowder products are inferior and cannot compete with imported products.
(2) Mainly based on ordinary silicon micropowder products
At present, the domestic production is mainly ordinary angular crystalline silicon micropowder and angular molten silicon micropowder. The medium and high-end silicon micropowder products represented by spherical silicon micropowder and ultrafine silicon micropowder are still mainly developed enterprises in Japan and the United States.
At present, the countries that can produce high-purity spherical silicon micropowder materials abroad are mainly Japan. In Japan, Tatsumori, Denka, Micro and other companies mainly produce spherical silicon micropowder, which is a major exporter of spherical silicon micropowder.
Japan is a resource-poor country, so most of the raw materials such as crystalline quartz need to be imported, mainly from countries and regions rich in quartz resources such as India, China, and Sri Lanka.
(3) Jiangsu Donghai Silicon Micropowder Enterprise has a high market share
At present, the number of enterprises capable of producing high-purity and ultra-micro silicon powder in China is very small, mainly distributed in Lianyungang and Xuzhou, Zhejiang, and Huzhou, Zhejiang.
There are more than 40 silicon micropowder enterprises in Donghai County, Lianyungang, Jiangsu, with more than 100 production lines and an annual output of more than 300,000 tons of silicon micropowder. Electronic grade silicon micropowder, electrical grade silicon micropowder and electrical grade silicon micropowder account for 70% and 60% of the domestic market respectively. And 40% , can produce more than 10 large categories of more than 100 kinds of silicon micropowder products.
Electronic grade ultrafine silicon micropowder production process
The rapid development of China's economy in recent years has made China the world's leading producer, consumer and exporter of silicon micropowder. China's share of silica fume consumption in the world is growing.
4. Problems in the development of silicon micropowder industry
(1) A mature standard system has not yet been established
Silicon micropowder belongs to the professional sub-sector of non-metal mineral processing industry. As the technical standards of the industry have not yet been established, the product standards are not unified , and the quality and standards of various enterprises are uneven. This restricts the rapid development of the industry to a certain extent. With the further improvement of the technical level.
(2) Product structure contradictions are prominent
Due to technical and research and development capabilities, most domestic silica micropowder manufacturers are crowded into the low-end products market with low gross profit.
Although the domestic silicon powder industry's production capacity and technology level have grown rapidly in recent years , its competitiveness in the international market is still weak. Companies in developed countries such as Japan have used the advantages of technology and R&D to monopolize the market for high value-added silicon micropowder products.
At the same time, there are some small enterprises with low technology level and low capital investment in the industry. The low-quality, low-environment investment brings low-cost impact on the silicon micro-powder market, and squeezes the living space of other silicon micro-powder production enterprises through price competition. Lead to disorderly competition in the market.
(3) There is still a gap between the level of R&D technology and foreign countries.
The production equipment of most domestic silicon micropowder production enterprises is relatively simple, the quality management system and application test system are relatively weak, and the technical content of the products and the quality stability of high-end products still have a certain gap compared with the world advanced level.
With the development of the silicon micropowder industry and the expansion of the downstream industry, the profit margin of low value-added products will continue to shrink. Domestic enterprises must seek technological breakthroughs and break the monopoly of foreign companies in the high-end products market.
5 , the development trend of silicon micropowder industry
As a fine powder filling material with excellent performance, it can play a vital role in the performance of downstream products. Therefore, research and development work on silicon micropowder products has been carried out to improve product fineness and product purity. Simplify the production process, reduce costs, etc. These are the direction of technological innovation.
(1) Ultrafine, high purity silicon powder
Ultrafine silicon micropowder has the characteristics of small particle size, large specific surface area, high chemical purity and good filling property. It is widely used in many fields such as copper clad laminates, adhesives, rubber, coatings, engineering plastics, medicine, papermaking, and daily chemicals.
High-purity silicon micropowder generally refers to silicon micropowder with SiO 2 content higher than 99.9%. It is mainly used in IC integrated circuits and quartz glass industries. Its high-grade products are widely used in large-scale and ultra-large scale integrated circuits, optical fibers, and lasers. In aerospace and military, it is an indispensable material for high-tech industries.
High-purity silicon micropowder will become the basic material of the 21st century electronics industry, and the demand will grow rapidly with good market prospects. The demand for ultrapure silicon micropowder in the world has also developed rapidly with the development of the IC industry. It is estimated that the world's demand for it will increase by 20% in the next 10 years.
(2) spherical silicon powder
In recent years, the microelectronics industry requires not only ultra-fine, but also high-purity, low-radioactive element content for large-scale, ultra-large-scale integrated circuit packaging materials, especially for the particle shape.
According to the development plan of China's semiconductor integrated circuits and devices, after 4-5 years, China's demand for spherical silicon micropowder will reach more than 100,000 tons . At present, the amount of spherical silicon micropowder used only for ultra-large scale integrated circuit molding materials has exceeded 3000 tons.
At present, there are only a few companies that can produce spherical silicon micropowder, and only some of the more advanced companies have production capacity. It is of great economic and social significance to carry out technical research on this material and to create high-tech products with independent intellectual property rights as soon as possible.
(3) Powder surface modification technology
The surface modification of powder refers to the treatment of the surface or interface of the powder material by physical, chemical or mechanical methods, and purposefully changes the chemical properties of the surface of the powder material to meet the development of modern new materials, new processes and new technologies. need.
At present, the main methods for surface modification of non-metallic mineral powders include surface chemical coating, precipitation reaction coating, and intercalation modification.
Click picture to view: Listen to Professor Zheng Shuilin explaining the development status, technology, equipment and trend of powder surface modification technology
With the continuous development of the downstream high-end application market, the requirements for the quality and stability of non-metallic mineral powder materials are constantly improving. At present, China's non-metallic mineral powder materials technology can not meet the application needs well, powder surface and interface. Modification technology will become one of the most important development directions of non-metallic mineral powder processing technology.
Source: China Non-Metallic Mining Industry Association
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