By lql | 12 February 2023 | 0 Comments
How is silicon dioxide produced?
What is Silicon dioxide powder?
Silica is an inorganic compound with the chemical formula of SiO2. Silicon atoms and oxygen atoms are arranged in long-range order to form crystalline silica, and short-range order or long-range disorder arrangement to form amorphous silica.
Silica is an inorganic compound with the chemical formula of SiO2. Silicon atoms and oxygen atoms are arranged in long-range order to form crystalline silica, and short-range order or long-range disorder arrangement to form amorphous silica.
preparation method of Silicon dioxide powder
As far as industrial production is concerned, the main preparation methods include the gas phase method with silicon tetrachloride as raw materials, the precipitation method with sodium silicate and inorganic acid as raw materials, the sol-gel method with silicate as raw materials, and the microemulsion method.
1. Gas-phase method Gas phase method is the main method for industrialized production of nano-SiO _ 2 in developed countries, and the nano-SiO _ 2 produced by this method has been widely used in various fields.
The production principle of the gas phase method is to directly use gas or change reactants into a gas by various means so that they will undergo physical and chemical changes in the gaseous state and then condense and grow into nanoparticles during cooling.
The specific process is: using organosilane halide as a raw material; it is hydrolyzed at high temperatures (generally as high as 1200~1600℃) in the flame of hydrogen and oxygen to produce smoky SiO2 with extremely fine particles. Smoky SiO _ 2 is integrated with larger particles in the concentrator and then collected in the deacidification furnace through the cyclone separator for deacidification, and the finished nano-SiO _ 2 can be obtained. The particle size of nano-SiO2 _ 2 obtained by this method is generally between 7 and 40 nm, and the prepared product has high purity, good dispersibility, and small particle size, but it requires higher equipment, a complex process, high energy consumption, and high production cost.
2. Precipitation Method Nano-SiO2 _ 2 is obtained from silicate through an acidification reaction. This method has a simple preparation process, low energy consumption, wide sources of raw materials, and low price, but the particle size of the product is affected by factors such as the type, concentration, and stirring speed of the acidifier. Moreover, the morphology of the prepared products is difficult to control, the pore size distribution is wide, aggregate particles are easy to form, and the quality is not as good as that of the products prepared by the gas phase method and sol-gel method, so they usually cannot show the proper characteristics of nano-materials, and are often used as ordinary fillers for polymer reinforcement and toughening.
SiO2 _ 2 prepared by the precipitation method has not only high water absorption but also weak heat resistance and electrical properties compared with the gas phase method. When it is extruded, it is easy to be accompanied by the foaming phenomenon, which makes it difficult for hot air to be vulcanized. Compared with the gas phase method, the reinforcement effect is poor.
Price of Silicon dioxide powder
Silicon dioxide powder particle size and purity will affect the product's price, and the purchase volume can also affect the cost of Silicon dioxide powder. A large amount of large amount will be lower. The price of Silicon dioxide powder can be found on our company's official website.
Silicon dioxide powder supplier
Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) Luoyang City, Henan Province, China, is a reliable and high-quality global chemical material supplier and manufacturer. It has more than 12 years of experience providing ultra-high quality chemicals and nanotechnology materials, including Silicon dioxide powder, nitride powder, Silicon dioxide powder, sulfide powder, and 3D printing powder. If you are looking for high-quality and cost-effective Silicon dioxide powder, you are welcome to contact us or inquire any time.
As far as industrial production is concerned, the main preparation methods include the gas phase method with silicon tetrachloride as raw materials, the precipitation method with sodium silicate and inorganic acid as raw materials, the sol-gel method with silicate as raw materials, and the microemulsion method.
1. Gas-phase method Gas phase method is the main method for industrialized production of nano-SiO _ 2 in developed countries, and the nano-SiO _ 2 produced by this method has been widely used in various fields.
The production principle of the gas phase method is to directly use gas or change reactants into a gas by various means so that they will undergo physical and chemical changes in the gaseous state and then condense and grow into nanoparticles during cooling.
The specific process is: using organosilane halide as a raw material; it is hydrolyzed at high temperatures (generally as high as 1200~1600℃) in the flame of hydrogen and oxygen to produce smoky SiO2 with extremely fine particles. Smoky SiO _ 2 is integrated with larger particles in the concentrator and then collected in the deacidification furnace through the cyclone separator for deacidification, and the finished nano-SiO _ 2 can be obtained. The particle size of nano-SiO2 _ 2 obtained by this method is generally between 7 and 40 nm, and the prepared product has high purity, good dispersibility, and small particle size, but it requires higher equipment, a complex process, high energy consumption, and high production cost.
2. Precipitation Method Nano-SiO2 _ 2 is obtained from silicate through an acidification reaction. This method has a simple preparation process, low energy consumption, wide sources of raw materials, and low price, but the particle size of the product is affected by factors such as the type, concentration, and stirring speed of the acidifier. Moreover, the morphology of the prepared products is difficult to control, the pore size distribution is wide, aggregate particles are easy to form, and the quality is not as good as that of the products prepared by the gas phase method and sol-gel method, so they usually cannot show the proper characteristics of nano-materials, and are often used as ordinary fillers for polymer reinforcement and toughening.
SiO2 _ 2 prepared by the precipitation method has not only high water absorption but also weak heat resistance and electrical properties compared with the gas phase method. When it is extruded, it is easy to be accompanied by the foaming phenomenon, which makes it difficult for hot air to be vulcanized. Compared with the gas phase method, the reinforcement effect is poor.
Price of Silicon dioxide powder
Silicon dioxide powder particle size and purity will affect the product's price, and the purchase volume can also affect the cost of Silicon dioxide powder. A large amount of large amount will be lower. The price of Silicon dioxide powder can be found on our company's official website.
Silicon dioxide powder supplier
Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) Luoyang City, Henan Province, China, is a reliable and high-quality global chemical material supplier and manufacturer. It has more than 12 years of experience providing ultra-high quality chemicals and nanotechnology materials, including Silicon dioxide powder, nitride powder, Silicon dioxide powder, sulfide powder, and 3D printing powder. If you are looking for high-quality and cost-effective Silicon dioxide powder, you are welcome to contact us or inquire any time.
Leave a Reply
Your email address will not be published.Required fields are marked. *