Fumed silica (fumed silica) is an important new high-tech ultrafine inorganic material. Adopted CAS NO7631-86-9; white fluffy powder, non-toxic, odorless and non-polluting. Due to its small particle size, it has large specific surface area, strong surface adsorption, large surface energy, high chemical purity, good dispersion, heat resistance, resistance to resistance, etc. It has unique properties in many disciplines and fields, with superior stability, enhancement, thickening and thixotropy, and irreplaceable role. Nanosilica, commonly known as "ultrafine silica", is widely used in various industries as additives, catalyst carriers, petrochemicals, decolorants, matting agents, rubber enhancers, plastic fillers, ink thickening agents, metal soft polishing agents, thermal insulation fillers, fillers for high-grade daily-use cosmetics, and spraying materials, pharmaceuticals, environmental protection and other fields. It provides a new material basis and technical guarantee for the development of related industrial fields.

Basic information

Silicon dioxide applications

Application 1: Silica is used in the manufacture of flat glass, glass products, foundry sand, glass fiber, ceramic glaze, sandblasting for rust prevention, sand for filtration, flux, refractory materials and the manufacture of lightweight bubbled concrete. Silica has many uses. Crystals, which are relatively rare in nature, can be used to manufacture important components in the electronic industry, optical instruments and handicrafts. Silica is an important raw material for the manufacture of optical fibers. Generally purer quartz can be used to make quartz glass. Quartz glass has a small expansion coefficient, equivalent to 1/18 of ordinary glass, can withstand drastic changes in temperature, and has good acid resistance (except HF). Therefore, quartz glass is often used to manufacture high temperature resistant chemical instruments. Quartz sand is often used as glass raw material and building material.

Application 2: Silica is a raw material for the manufacture of glass, quartz glass, water glass, optical fiber, important components of the electronic industry, optical instruments, handicrafts and refractory materials, and is an important material for scientific research.

Application 3: When silica crystal is perfect, it is crystal; silica gelation and dehydration is agate; silica water-containing colloid solidifies and becomes opal; when silica grains are smaller than a few microns, it forms chalcedony and flint. , Secondary quartzite. It is a mineral resource with very stable physical and chemical properties. The crystal belongs to the oxide mineral of the trigonal system, that is, low-temperature quartz (α-quartz), which is the most widely distributed mineral species in the quartz group. Quartz in a broad sense also includes high temperature quartz (beta-quartz). Quartz block, also known as silica, is mainly the raw material for the production of quartz sand (also known as silica sand), as well as the raw material for quartz refractories and sintering ferrosilicon.

Application 4: Food industry is used as anticaking agent, defoaming agent, thickening agent, filter aid, clarifying agent. my country's "Hygienic Standard for the Use of Food Additives" (GB2760-2011) stipulates that it can be used in egg powder, powdered sugar, milk powder, cocoa powder, cocoa butter, vegetable powder, instant coffee, soup powder, etc., with a maximum usage of 15g/kg , powder flavor, the maximum usage is 80g/kg; solid beverages, the maximum usage is 0.2g/kg; grain, 1.2g/kg.