Spherical silicon powder is mainly used for large-scale integrated circuit packaging. It is also used in high-tech fields such as aviation, aerospace, fine chemicals, rewritable discs, large-area electronic substrates, special ceramics and daily cosmetics. It is used in epoxy resin systems. As a filler, 30% epoxy resin can be saved, and the market prospect is very broad. Experts from China Epoxy Resin Industry Association predict that by 2010, my country's demand for spherical silicon powder alone will reach 20,000 to 30,000 tons, and high-purity silicon powder will be 100,000 tons, with an average annual growth rate of more than 20%. The world's demand for spherical silicon powder will exceed 300,000 tons, worth tens of billions. With the rapid development of my country's microelectronics industry, large-scale and ultra-large-scale integrated circuits have increasingly higher requirements for packaging materials, which require not only ultra-fine but also high purity, especially for particle shapes. However, the preparation of spherical silica powder is an interdisciplinary and difficult project. At present, only a few countries in the world, such as the United States, Japan, Germany, Canada, and Russia, have mastered this technology.

　　In order to break the tight seal of foreign countries on my country's spherical silicon powder production technology and special equipment, since the "10th Five-Year Plan", more than 20 research units in my country have successively tackled key problems in this technical equipment. According to experts from the China Epoxy Resin Industry Association, many units have made breakthroughs in this regard. For example, the Institute of Process Engineering of the Chinese Academy of Sciences has successfully developed a new process for preparing high-purity spherical silicon powder; Hubei Research and Design Institute of Building Materials and Tsinghua University Materials The department’s cooperation in the research of high-purity and ultra-fine spherical silica powder has passed the provincial appraisal; Wuhan University uses chemical synthesis technology to prepare spherical silica powder, and the technical indicators reach the level of the KE-P series of NipponShokuba company in Japan; Wuhan Shuaier Optoelectronics New Material in Hubei Province The project of spherical silicon powder for packaging materials of VLSI developed by Co., Ltd.; The molding technology project of high-purity and ultra-fine spherical silicon powder developed by Sanhui Silicon Material Co., Ltd. of Mianyang City, Sichuan Province was included in the 2003 National Science and Technology Innovation Fund Project; Yunnan Super The project of producing spherical fused silica powder by high-temperature melting method developed by Micro New Materials Co., Ltd. entered the 2004 National New Material High-Tech Industrialization Project; Hainan Provincial Geological Survey Bureau Powder Materials Engineering Technology Research Center selected crystalline quartz sand As a raw material, it successfully made spherical silicon powder, which is suitable for electronic plastic packaging materials.

　　Since 2005, a number of heavyweight achievements have appeared: In August 2005, the key technology and products of high-frequency plasma preparation of spherical silicon powder undertaken by Jingrui Quartz Industrial Development Research Institute, Lianyungang City, Jiangsu Province, passed the ministerial appraisal, and A 50-ton/year pilot production line was built, with the domestic leading technology level, and the main product performance reaching the international advanced level; in March 2006, Lianyungang Donghai Silicon Micron Powder Co., Ltd. undertook the chemical synthesis spherical silicon powder project for micron-level integrated circuits. The appraisal of scientific and technological achievements hosted by the Science and Technology Department of Jiangsu Province broke the foreign monopoly in the field of chemical synthesis of spherical silica powder. The technology and process equipment reached the international advanced level and filled the domestic gap. In July 2006, China Triumph International Engineering Co., Ltd. The high-purity spherical quartz powder product industrial preparation technology and special production equipment development project jointly developed by the company and Bengbu Glass Industry Design and Research Institute has passed the appraisal. The technology and equipment are the first in China, and the spheroidization rate, vitrification rate and dispersibility of the product are The main technical indicators have reached the international advanced level, and the continuous and stable industrialized production has been realized, and the production scale of 450 tons/year has been formed, and the products can replace imports.

　　my country is rich in quartz and has a wide distribution of mineral resources. There are nearly 100 large and small silicon powder factories across the country, all of which are basically township enterprises. Most of these production enterprises are small in scale and single in variety. They use conventional processing equipment from non-mining industries and lack systematic control methods in the process. As a result, the purity, particle size and product quality stability of silicon micropowder products are poor and cannot compete with imported products. Few of these companies can really produce high-purity, ultra-fine silicon powder, which are mainly distributed in Lianyungang, Jiangsu, Xuzhou, Zhejiang, Huzhou, Hebei, Qinghai and other places. Their main products are concentrated below 600 meshes, and the application areas are generally electrical products. Oxygen resin castable filler and electronic discrete component packaging and metallurgy, ceramics and other industrial fields.