By lql | 07 February 2023 | 0 Comments
What is the composition of silica?
What is Silicon dioxide?
Silica dioxide is an inorganic compound with the chemical formula of SiO2. The long-range ordered arrangement of silicon atoms and oxygen atoms forms crystalline silica, and the short-range ordered or long-range disordered arrangement forms amorphous silica.
Silica dioxide is an inorganic compound with the chemical formula of SiO2. The long-range ordered arrangement of silicon atoms and oxygen atoms forms crystalline silica, and the short-range ordered or long-range disordered arrangement forms amorphous silica.
Physicochemical property of Silicon dioxide Powder
Chemical properties are relatively stable. Does not react with water. It is an acidic oxide and does not react with ordinary acids. Gaseous hydrogen fluoride reacts with silica to produce gaseous silicon tetrafluoride. React with hot strong alkali solution or molten alkali to produce silicate and water. React with various metal oxides at high temperature to generate silicate. Used for manufacturing Shi Ying glass, optical instruments, chemical utensils, ordinary glass, refractory, optical fiber, ceramics, etc. Silica is inactive in nature, and it does not react with halogen, hydrogen halide, sulfuric acid, nitric acid and perchloric acid except hot concentrated phosphoric acid.
Characteristics of Silicon dioxide Powder
Common concentrated phosphoric acid (or pyrophosphoric acid) can corrode silica at high temperatures and generate heteropoly acids. Melting borate or boric anhydride at a high temperature can also corrode silica. In view of this property, borate can be used as a fluxing agent in ceramic firing. In addition, hydrogen fluoride can also be an acid that can dissolve silica and generate water-soluble fluorosilicic acid: 6HF+SiO2=H2SiF6+2H2O.
Generally speaking, silica does not react with water; that is, it does not generate silicic acid when contacted with water, but it is artificially specified that silica is the anhydride of silicic acid.
Structural composition of Silicon dioxide
Silica structure In the temperature range that most microelectronic processes are interested in, the crystallization rate of silica is so low that it can be ignored. Although the molten Shi Ying is not ordered in a long-range, it shows a short-ordered structure, and its structure can be considered as four oxygen atoms located at the apex of the tetrahedron. The centre of the polyhedron is a silicon atom.
In this way, every four oxygen atoms are approximately covalently bonded to silicon atoms, satisfying the valence shell of silicon. If each oxygen atom is part of two polyhedrons, the valence of oxygen is also satisfied, resulting in a regular crystal structure called Shi Ying.
In molten Shi Ying, some oxygen atoms become oxygen bridges and bond with two silicon atoms. Some oxygen atoms have no oxygen bridge and only bond with one silicon atom.
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, graphite 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.
Chemical properties are relatively stable. Does not react with water. It is an acidic oxide and does not react with ordinary acids. Gaseous hydrogen fluoride reacts with silica to produce gaseous silicon tetrafluoride. React with hot strong alkali solution or molten alkali to produce silicate and water. React with various metal oxides at high temperature to generate silicate. Used for manufacturing Shi Ying glass, optical instruments, chemical utensils, ordinary glass, refractory, optical fiber, ceramics, etc. Silica is inactive in nature, and it does not react with halogen, hydrogen halide, sulfuric acid, nitric acid and perchloric acid except hot concentrated phosphoric acid.
Characteristics of Silicon dioxide Powder
Common concentrated phosphoric acid (or pyrophosphoric acid) can corrode silica at high temperatures and generate heteropoly acids. Melting borate or boric anhydride at a high temperature can also corrode silica. In view of this property, borate can be used as a fluxing agent in ceramic firing. In addition, hydrogen fluoride can also be an acid that can dissolve silica and generate water-soluble fluorosilicic acid: 6HF+SiO2=H2SiF6+2H2O.
Generally speaking, silica does not react with water; that is, it does not generate silicic acid when contacted with water, but it is artificially specified that silica is the anhydride of silicic acid.
Structural composition of Silicon dioxide
Silica structure In the temperature range that most microelectronic processes are interested in, the crystallization rate of silica is so low that it can be ignored. Although the molten Shi Ying is not ordered in a long-range, it shows a short-ordered structure, and its structure can be considered as four oxygen atoms located at the apex of the tetrahedron. The centre of the polyhedron is a silicon atom.
In this way, every four oxygen atoms are approximately covalently bonded to silicon atoms, satisfying the valence shell of silicon. If each oxygen atom is part of two polyhedrons, the valence of oxygen is also satisfied, resulting in a regular crystal structure called Shi Ying.
In molten Shi Ying, some oxygen atoms become oxygen bridges and bond with two silicon atoms. Some oxygen atoms have no oxygen bridge and only bond with one silicon atom.
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, graphite 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.
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