Year1
- 含量：
- 99
- 外观：
- 白色
- 包装：
- 25公斤
Vapor-phase silica is one of the extremely important new high-tech ultrafine inorganic materials. Due to its small particle size, it has a large specific surface area, strong surface adsorption, large surface energy, high chemical purity, and good dispersion properties. It has special properties in terms of good, thermal resistance, electrical resistance, etc. With its superior stability, reinforcement, thickening and thixotropy, it has unique characteristics in many disciplines and fields and plays an irreplaceable role. Nanosilica, commonly known as ultrafine silica, is widely used in various industries as additives, catalyst carriers, petrochemicals, decolorants, matting agents, rubber reinforcing agents, plastic fillers, ink thickeners, and metal soft polishes. Agents, insulation fillers, advanced daily cosmetic fillers and spray materials, medicine, environmental protection and other fields. It also provides new material foundation and technical guarantee for the development of related industrial fields.
Chemical vapor deposition (CVD) method, also known as pyrolysis method, dry method or combustion method. The raw materials are generally silicon tetrachloride, oxygen (or air) and hydrogen, which are reacted at high temperatures. The reaction formula is: +++. Air and hydrogen are respectively pressurized, separated, cooled and dehydrated, silica gel dried, dusted and filtered before being sent to the synthetic hydrolysis furnace. The silicon tetrachloride raw material is sent to the distillation tower for rectification, heated and evaporated in the evaporator, and sent to the synthetic hydrolysis furnace with dry and filtered air as the carrier. After silicon tetrachloride is vaporized at high temperature (flame temperature ~℃), it is combined with a certain amount of hydrogen and oxygen (or air) to perform gas phase hydrolysis at a high temperature of about ℃. The gas phase silica particles generated at this time are extremely fine. It forms an aerosol with gas and is difficult to capture, so it is first gathered into larger particles in the accumulator, and then collected by the cyclone separator, and then sent to the deacidification furnace, and the gas phase silica is purged with nitrogen-containing air to a value of ~The finished product.
Introduction to the application of vapor phase silica
High temperature vulcanized silicone rubber: vapor phase silica mainly plays a reinforcing role in the silicone rubber, giving it good mechanical properties and dielectric properties. Recommended products: -, 3, B, B. Recommended dosage ~ serving.
Room temperature vulcanized silicone rubber (R) and adhesives: Vapor-phase silica mainly plays the role of reinforcement, thickening, and thixotropy in the system, giving R excellent mechanical properties and thixotropic properties. It can be widely used in silicone glue, glue, polysulfide rubber, epoxy resin, etc. Recommended products -, -, B, B. Recommended dosage is 3~ servings.
Coatings, inks and paints: Vapor-phase silica mainly plays a thickening and thixotropic effect in coatings, inks and paints. When silica is dispersed in the system, it can form a good nanoparticle network. After the shear force is applied, the network is destroyed, and after the shear force is eliminated, the network can quickly recover, thus playing the role of thickening, thixotropy and anti-settlement. In addition, the physical and mechanical properties of the material can also be improved. In powder systems, it can also improve product fluidity and prevent agglomeration. Recommended products: -, -B, B, recommended dosage. ~3 servings.
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