Silicon dioxide (SiO ₂) is an inorganic compound in which silicon atoms and oxygen atoms are covalently bonded to form the basic structure of silicon oxygen tetrahedra. These tetrahedra are then connected by shared oxygen atoms to form a three-dimensional network, forming the crystalline or amorphous structure of silicon dioxide. Silicon dioxide is widely present in nature and is one of the most abundant compounds in the Earth's crust, accounting for approximately 12% of its mass.


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nature
Silicon dioxide has stable chemical properties, is insoluble in water, and does not react with general acids (except hydrofluoric acid). It has high fire resistance, high temperature resistance, low coefficient of thermal expansion, high insulation, corrosion resistance and other characteristics. In addition, silicon dioxide also exhibits piezoelectric effect, resonance effect, and unique optical properties.


application
Due to its unique physical and chemical properties, silica has a wide range of applications in various fields. It is an important raw material for manufacturing glass, quartz glass, optical fibers, electronic industry components, optical instruments, and refractory materials. In addition, silica can also serve as a lubricant, anti adhesive, and flow aid, playing an important role in drug granulation and compression.


Properties and Applications of Carbon Black
Carbon black is an extremely fine black powder mainly composed of carbon. It is usually produced by incomplete combustion of organic substances such as oil and natural gas.


nature
Carbon black has a high specific surface area, high oil absorption value, and good conductivity. Its particle shape and size have a significant impact on its performance. The smaller the carbon black particles, the larger the specific surface area, and the higher the oil absorption value.


application
Carbon black, as an important filler in the rubber industry, can enhance the wear resistance, tensile strength, and hardness of rubber. In addition, carbon black is also used in the manufacturing of inks, pigments, plastics, coatings, and batteries. Carbon black can significantly improve the service life and performance of rubber products.