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[Chemical Knowledge]：Properties and uses of white carbon black

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Silica is an important raw material for chemical production and is widely used in many fields. This article will detail the properties and uses of white carbon black.

1. the nature of silica

silica is an amorphous silica, usually made from silicate ore through pickling, precipitation, drying and calcination processes. It has the following properties:

1. High purity: the purity of white carbon black is very high, generally can reach more than 99%, almost no impurities.

2. Large specific surface area: Silica has a large specific surface area, generally between 100-400m ²/g, which makes it have excellent adsorption properties in many applications.

3. good dispersion: white carbon black in water and organic solvents have good dispersion, can form a stable suspension.

4. Chemical inertness: Silica has good chemical inertness and does not react with other substances, so it can be widely used in many chemical reactions.

2. the use of silica

silica as an important chemical raw material, widely used in the following fields:

1. rubber industry: silica is one of the important reinforcing agent in the rubber industry, can improve the mechanical properties of rubber, wear resistance and anti-aging properties. It is widely used in rubber products such as tires, rubber hoses and tapes.

2. Plastics industry: Silica can be used as a filler and reinforcing agent for plastics to improve the hardness, rigidity, heat resistance and dimensional stability of plastics. Commonly used in PVC, polypropylene and other plastic products.

3. coating industry: white carbon black has good thickening and thixotropy, can be used as coating additives, improve coating leveling, anti-settling and storage stability.

4. ceramic industry: silica can be used as one of the raw materials of ceramics to improve the density, mechanical strength and heat resistance of ceramics.

5. food industry: white carbon black can be used as food additives, used to make candy, chocolate and other food, improve the taste and texture of food.

In short, as an important raw material for chemical production, silica has a wide range of uses and excellent performance, and plays an important role in promoting the development of the chemical industry.

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