Overview of the development of crystalline silicon micro powder industry

At present, only a few countries in the world, such as China, Japan, South Korea, and the United States, have the production capacity of crystalline silicon micro powder. The market for silicon micro powder in China is mainly in China, and the silicon micro powder industry is capital, technology, and resource intensive. The production of silicon micro powder is closely related to the supply of raw materials. China's quartz sand resources are mainly distributed in Fengyang, Anhui Province, Donghai, Jiangsu Province, Guangxi Province, and other places. The downstream market in China is still concentrated in economically developed regions such as East China and South China, while domestically strong silicon micro powder production enterprises are mainly distributed in economically developed areas and areas rich in raw materials, concentrated in Jiangsu Lianyungang, Anhui Fengyang, Zhejiang Huzhou and other areas. Among them, Donghai County in Lianyungang, Jiangsu is the largest silicon micro powder production base in China and also an early area engaged in the research, development and production of electronic grade silicon micro powder in China.

From the perspective of the industrial chain, the profit level of the silicon micro powder industry is jointly affected by the upstream quartz, fused silica and other raw material markets and the development level of the downstream application industry. Since 2016, the national copper-clad laminate industry has been increasingly recovering, and the demand for related industries such as EMC and adhesives has continued to be strong. The speed of updating the manufacturing process of domestic silicon micro powder products has accelerated, which has driven the rapid increase in the market size and efficiency of silicon micro powder products. At the same time, there are significant differences in the profit levels of production enterprises within the industry. Production enterprises with strong research and development capabilities, advanced technological equipment, and core technology for process control, capable of producing high-quality products and operating on a large scale, have stable profits and generally high profit levels.

From the perspective of industry enterprise scale, although China is rich in quartz and has a wide distribution of mineral sources, with nearly a hundred small and large silicon micro powder factories nationwide, they are basically township enterprises. Due to the small scale and single variety of production enterprises, which use conventional processing equipment in non mineral industries, there is a lack of systematic control measures in the process. The purity, particle size, and product quality stability of silicon micro powder products are poor, and they cannot compete with imported products. At present, the main products produced domestically are ordinary angular crystalline silicon micro powder and angular molten silicon micro powder. High end silicon micro powder products represented by spherical silicon micro powder, ultrafine silicon micro powder, etc. are still mainly produced by enterprises in developed countries such as Japan and the United States. At present, Japan is the main country that can produce high-purity spherical silicon micro powder materials abroad. Japan is currently the main exporter of spherical silicon micro powder, with companies such as Tatsumori, Denka, and Micro producing spherical silicon micro powder. 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. At present, there are very few enterprises in China that can produce high-purity and ultrafine silica micro powders, mainly distributed in areas such as Lianyungang and Xuzhou in Jiangsu, and Huzhou in Zhejiang. Among them, Donghai County in Lianyungang, Jiangsu Province has more than 40 silicon micro powder enterprises, more than 100 production lines, and an annual output of over 300000 tons of silicon micro powder. Electronic grade silicon micro powder, electrical grade silicon micro powder, and electrical grade silicon micro powder account for 70%, 60%, and 40% of the domestic market, respectively. They can produce more than 100 types of silicon micro powder products in more than 10 categories, and have the largest domestic silicon micro powder enterprise - Lianyungang Haosen Mineral Products Co., Ltd.