Properties, Applications, and Market Situation of Silicon Dioxide
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1、 Properties of Silicon Dioxide
Silicon dioxide (SiO ₂) is a common inorganic compound with the following main properties:
physical property:
Colorless transparent crystal or white powder, high melting point (about 1713 ℃), high hardness, and insoluble in water.
Gas phase silica (gas-phase white carbon black) has the characteristics of small particle size, large specific surface area, high surface activity, and good dispersibility.
chemical property:
Chemical stability, insoluble in water, does not react with general acids, but can react with hydrofluoric acid to generate silicon tetrafluoride gas:

At high temperatures, it can react with alkaline oxides or strong bases to form silicates.

2、 The use of silica
Silicon dioxide has a wide range of applications, covering multiple fields:
Glass manufacturing: used for producing flat glass, glass fiber, quartz glass, etc.
The electronics industry is an important raw material for manufacturing optical fibers and electronic components.
Chemical industry: used for the production of water glass, silicates, refractory materials, etc.
Building materials: used for manufacturing lightweight bubble concrete, refractory bricks, etc.
Rubber and plastic: used as reinforcing agents and fillers to improve the mechanical properties of materials.
Coatings and adhesives: used to improve the leveling, anti settling, and weather resistance of coatings.
Food and medicine: used as anti caking agents, defoamers, etc.


3、 Market situation of silicon dioxide
Market size and growth:
In 2024, the market size of gas-phase silica in China reached 5.84 billion yuan, a year-on-year increase of 13%.
The global production of gas-phase silica is increasing year by year, and is expected to reach 364000 tons by 2024.

Industry development trend:
Technological progress: The precipitation method of silica technology has matured in China, and both production capacity and output are showing a steady growth trend.
Environmental requirements: With the strengthening of environmental policies, silica production enterprises need to continuously improve energy utilization efficiency and reduce pollutant emissions.
Emerging applications: With the rapid development of new energy, electronics, high-end manufacturing and other fields, the market demand for silica will continue to grow.
Regional markets:
China has become one of the important production and consumption markets for silica globally, especially in the field of precipitated silica, with production capacity and output ranking among the top in the world.


In summary, silica has broad application prospects in multiple fields due to its excellent physical and chemical properties. With the advancement of technology and the increase in market demand, the silica industry will continue to maintain a good development trend in the future.