Nanometer material and preparing method thereof

Abstract

The invention discloses a nanometer material and a preparing method thereof. The preparing method comprises the following steps of S1, heating quartz ore to be in a molten state, evaporating silicon dioxide into air in a gaseous state, and sending collected silicon dioxide dust-containing air in a reaction chamber; S2, conveying the air to an ionizer at high pressure, quickly mixing ion-carrying air and silicon dioxide air in the ionizer, and meanwhile, introducing wild air to cool the silicon dioxide air; S3, making the cooled silicon-dioxide-containing air pass through an electrostatic field, forming chained-type bead strings through silicon dioxide particles under the function of electric charges, and then filtering and collecting the bead string-type silicon dioxide particles; S4, forming nanoscale silicon dioxide particles after collected silicon dioxide bead string dust is subjected to reverse discharge. According to the nanometer material and the preparing method thereof, the prepared nanometer material is the nanoscale silicon dioxide microspheres with the purity of 96% or above and is of a microporous structure, the particle size is within the range of 8-40 nm, and the specific surface area is 75-150; the preparing cost is low, and the prepared nanometer material has good thermal stability; the chemical property is good.

Description

technical field [0001] The invention relates to the field of nanotechnology, in particular to a silicon dioxide nanometer material and a preparation method thereof. Background technique [0002] Fumed silica, commonly known as "nano silica", is widely used in various industries as additives, catalyst carriers, decolorizers, matting agents, rubber reinforcing agents, plastic fillers, ink thickeners, metal soft polishing agents, Insulation and heat insulation fillers, high-grade daily cosmetic fillers and spraying materials, medicine, environmental protection, petrochemical and other fields. It also provides a new material foundation and technical guarantee for the development of related industrial fields. Because it shows special functions compared with conventional materials in terms of magnetism, catalysis, light absorption, thermal resistance and melting point, it has attracted great attention. [0003] At present, the production of fumed white carbon black uses polysili...

AI Technical Summary

Problems solved by technology

However, the preparation of fumed silica by combustion method has low purity, relatively low conversion rate, low yield, and expensive preparation equipment

Ultimately lead to high finished product prices