High Purity Silicon Dioxide SiO2 powder CAS 7631-86-9, 99.9%

Description of Silicon Dioxide SiO2 powder：

Silicon dioxide, with the chemical formula SiO2, is an inorganic compound with a unique set of physical and chemical properties.

First, silica has a high melting point, usually between 1600-1700 ° C. This means that it does not melt easily at high temperatures, so it can withstand high-temperature treatment. Secondly, silica has a high hardness, second only to diamond. This makes it an important abrasive material for the manufacture of various grinding wheels, sandpaper, and grinders. In addition, silica is insoluble in water but can react with certain acids.

In terms of physical properties, silica has excellent insulation properties and stability. It can be used to make insulating materials in various electronic devices. In addition, silica has properties such as corrosion resistance, wear resistance, and oxidation resistance, making it exhibit excellent performance in many applications.

In addition to its physical properties, silica has a number of chemical properties. It can react with certain metals at high temperatures to form silicates and metal oxides. In addition, silica can react with certain acids to produce products such as silicates and sulfur dioxide.

Silica is widely found in nature. It is a common component in rocks and makes up many different types of rocks and minerals. In addition, silica is found in the cell walls of certain organisms, such as diatoms and certain plants.

Technical Parameters of Silicon Dioxide SiO2 -

Sodium silicate process

The sodium silicate process is a commonly used method for producing silica. The method is to react sodium silicate solution with acid to produce silica precipitate and corresponding salt. The specific steps are as follows:

The sodium silicate solution is reacted with acids (such as hydrochloric acid sulfuric acid, hydrochloric acid, nitric acid, etc.) to adjust the pH value of the solution to keep it within a certain range.

The reaction solution is filtered to remove insoluble matter and impurities.

The filtered solution is evaporated and concentrated to precipitate the silica.

The silica residue is washed, dried, and crushed to obtain the desired silica product.

It should be noted that the reaction conditions of the sodium silicate process and the control of pH value have an important impact on the purity and quality of silica. In addition, the method requires the use of a large amount of acid and sodium silicate raw materials, and the cost is high and not suitable for large-scale production.

Second, silicate method

The silicate process is a method of producing silica by sintering silicate mineral raw materials at high temperatures. This method usually takes quartz sand, feldspar, clay, and so on as raw materials through high-temperature sintering, crushing, grinding, and other processes to produce the required silica products. The specific steps are as follows:

The silicate mineral raw materials (such as quartz sand, feldspar, clay, etc.) are crushed to a certain granularity, and the ingredients are carried out.

The prepared raw materials are sintered at high temperatures to decompose and transform the silicate minerals in them.

The sintered clinker is crushed and ground to obtain a preliminary silica product.

The primary silica product is purified and refined to remove impurities and harmful elements, and high-purity silica is obtained.

It should be noted that the ratio of raw materials, sintering temperature, and sintering time of the silicate method have important effects on the purity and quality of silicon dioxide. In addition, this method requires the use of high-temperature equipment for sintering, crushing, and other processes, which have high energy consumption. However, the silicate method has the advantages of a mature process, large yield, and low cost, so it has been widely used in industry.

Glass and ceramics industry

The glass and ceramic industry is one of the most important application areas for silica. Silicon dioxide can be used to produce a variety of different types of glass and ceramic products. In glass manufacturing, silica can improve the light transmission, chemical stability, and mechanical strength of glass. In the ceramic industry, silica can be used as an aggregate and reinforcing agent to improve the hardness and impact resistance of ceramics. In addition, silica can also be used to manufacture a variety of advanced ceramics and composite materials.

Second, the coatings and paints industry

Silica can be used in the manufacture of various coatings and paints, such as waterproof coatings, anti-corrosion coatings, fireproof coatings, and so on. Silica has excellent insulation properties and weather resistance, which can protect the coating from the external environment and chemical substances while also improving the adhesion and wear resistance of the coating. In addition, silica can also be used to manufacture a variety of advanced coatings and paint additives, such as anti-scratch agents, antistatic agents, etc.

Third, electronics and semiconductor industries

Silicon dioxide can be used to make a variety of electronic devices, such as transistors, solar cells, etc. In these devices, silicon dioxide can be used as an insulating layer, a dielectric layer, a mask layer, etc., to protect the circuit and improve the stability of the device. In addition, silica can also be used to manufacture a variety of advanced electronic materials and sensors.

Aerospace and military fields

Silicon dioxide can be used to make a variety of advanced materials and devices, such as aerospace spacecraft casings, satellite dishes, and stealth fighter surface coatings. In these materials and devices, silica can play a role in enhancing mechanical properties, improving high-temperature resistance, and reducing radar reflection area. In addition, silica can also be used in the manufacture of various military equipment and weapons, such as missile guidance systems.

Medicine and biomedicine

Silicon dioxide can be used to make a variety of drugs and biomaterials, such as anti-cancer drug carriers, gene therapy carriers, artificial joints, and teeth. In these drugs and biomaterials, silica can play a role in controlling drug release improving drug stability and biocompatibility. In addition, silica can also be used to manufacture a variety of biological imaging reagents and diagnostic reagents.

Storage condition of Silicon Dioxide SiO2 pulver :
You should keep nanosilicon dioxide SiO2 powder in a dry and clean environment.

Shipping and Packing of Silicon Dioxide SiO2 powder ：
You can pack it in two plastic bags with the inside.
Silicon Dioxide SiO2 Powder Packaging: 100g, 500g and 1kg/bag. 25kg/barrel. Or as you request.
Shipping Silicon Dioxide SiO2 powder: can ship by sea or air as soon as payment receipt is received.

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