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By TRUNNANO | 02 November 2021 | 0 Comments

Silicon dioxide preparation and applications

What is silicon dioxide?
Silicon dioxide is a kind of inorganic substance, the chemical formula is SiO2, silicon, and oxygen atoms long-range ordered arrangement to form crystalline silicon dioxide, short-range ordered or long-range disordered arrangement to form amorphous silicon dioxide. In silicon dioxide crystals, the silicon atom is located in the center of the regular tetrahedron, and the four oxygen atoms are located on the four apex angles of the regular tetrahedron. Many such tetrahedrons are connected by the oxygen atoms at the apex angles. Each oxygen atom is common to two tetrahedrons, that is, each oxygen atom is combined with two silicon atoms. The simplest form of silicon dioxide is SiO2, but SiO2 does not represent a simple molecule (just the ratio of the number of atoms of silicon and oxygen in a silicon dioxide crystal). Pure natural silica crystal, is a hard, brittle, insoluble colorless transparent solid, often used in the manufacture of optical instruments, etc
Silicon dioxide application
Silica is the raw material for the manufacture of glass, quartz glass, sodium silicate, optical fiber, electronic industry important components, optical instruments, handicrafts, and refractory materials, and is an important material for scientific research.
When silica crystallizes perfectly, it is crystal; After silica gel dehydration is agate; The colloidal silica-containing water solidifies and becomes opal; When the silica grains are smaller than a few microns, they form chalcedony, chert, and secondary quartzite. Physical and chemical properties are very stable mineral resources, crystal belongs to tripartite oxide minerals, that is, low-temperature quartz (α -quartz), which is the most widely distributed quartz mineral in a mineral species. The broad term quartz also includes high-temperature quartz (β -quartz). Quartz block, also known as silica, is mainly the production of quartz sand (also known as silica sand) of raw materials, but also quartz refractories and burning iron silicon raw materials.
In addition, silica can also be used as a lubricant, is an excellent flow promoter, mainly as a lubricant, anti-viscosity agent, flow aid agent. It is especially suitable for the granulation of oil and extract, and the granulation has good fluidity and compressibility. It can also be used as a flow aid in direct compression tablets. As a disintegrating agent, it can greatly improve the fluidity of particles, increase the bulk density, increase the hardness of the prepared tablets, shorten the disintegration time, and improve the dissolution rate of drugs. Granules can be used as an internal desiccant to enhance the stability of drugs. Can also be used as a filter aid, clarifying agent, defoaming agent and liquid preparation of suspension, thickening agent.
Silicon dioxide structure
Silicon and carbon have similar properties, but the properties of their oxides are quite different.CO2 is a molecular crystal, while SiO2 is an atomic crystal.SiO2 is a three-dimensional network structure formed by silicon-oxygen tetrahedron as the basic structure. In the crystal structure, four valence electrons of silicon atom and four oxygen atoms form four covalent bonds. Si atom is located in the center of the regular tetrahedron, an O atom is located at the vertex of the tetrahedron. Each silicon atom is bonded to four oxygen atoms, and each oxygen atom is bonded to two silicon atoms. The smallest ring in the crystal consists of 12 atoms (6 silicon atoms and 6 oxygen atoms), and each silicon is shared by 6 rings. The ratio of silicon and oxygen atoms in the crystal is 1:2.
Silicon dioxide Supplier
TRUNNANO (aka. Luoyang Tongrun Nano Technology Co. Ltd.) is a trusted global chemical material supplier & manufacturer with over 12 years of experience in providing super high-quality chemicals and Nanomaterials. Currently, our company has successfully developed a series of materials. The silicon dioxide produced by our company has high purity, fine particle size, and impurity content. Send us an email or click on the needed products to send an inquiry.

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