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[Chemical Knowledge]：Properties and Uses of Precipitated Silica

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Precipitated silica in the chemical production of raw materials in the field of properties and uses
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1. Introduction

precipitated silica, also known as hydrated silica or silica gel, is an important raw material for the production of inorganic chemicals. Due to its unique physical and chemical properties, precipitated silica is widely used in many fields. This article will detail the properties and uses of precipitated silica.

2. the properties of precipitated silica

1. physical properties: precipitated silica is usually white powder or particles, with high specific surface area and pore volume. Its porous structure makes the precipitated silica have better adsorption properties.
2. Chemical properties: The surface of precipitated silica is rich in hydroxyl groups, making it hydrophilic. At the same time, precipitated silica is also acidic and can react with alkali metal hydroxides.

3. the use of precipitated silica

1. rubber industry: precipitated silica is often used as a reinforcing agent in the rubber industry. Due to its high specific surface area and porous structure, precipitated silica can effectively improve the mechanical properties of rubber, such as tensile strength, tear strength and wear resistance.
2. Plastics industry: In the plastics industry, precipitated silica can be used as an additive to improve the heat resistance, hardness and dimensional stability of plastics.
3. coating industry: precipitated silica has good suspension and thixotropy, can be used as a thickener of coatings, improve the storage stability and construction performance of coatings.
4. Ceramic industry: In the ceramic industry, precipitated silica can be used as one of the raw materials to improve the density and mechanical strength of ceramics.
5. Food industry: Precipitated silica can be used as a food additive for making candy, chocolate and other foods to improve the taste and fluidity of food.

4. conclusion

precipitated silica as an important raw material for inorganic chemicals production has unique physical and chemical properties, so it has a wide range of applications in many fields. In the future development, with the continuous progress of science and technology, the application field of precipitated silica will be further expanded.

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