Because of its special structure, silica aerogel has the characteristics of good heat insulation, low density, low sound transmission rate and large surface area. Use water glass rationally when preparing silica gel. Water glass is a soluble alkali metal silicate formed by silicon dioxide and alkali metal oxides, and is also known as sulphuricine. Water glass can be divided into two types by alkali metal, namely potassium water glass and soda water glass. At this stage, the basic direction of preparing silica aerogels is to use low-cost silicon sources.
1. Thermal insulation
The typical application of silica gel is thermal insulation. Silica aerogel has a thermal conductivity of less than 0.02W/(m·k), and even a thermal conductivity lower than that of air. Silica aerosol is the best thermal insulation material in the current application process. It is suitable for use in national defense, industry, scientific research, etc., especially in the fields of navigation and aerospace. In addition, it can also be used in pipeline insulation. , Refrigerator heat insulation, clothing warmth and heat insulation glass.
2. Catalyst carrier and catalyst
With the continuous development and research of silica gel, the heat transfer and strength of silica aerogel can be continuously improved, and its application in catalyst carriers and catalysts can be guaranteed. For example, organic fusion of SiO2 and TO2 or co-hydrolysis of Si and T metal alkoxide can obtain TO2-SiO2 aerogel. It can effectively improve the adsorption performance and specific surface area of silica aerogel.
3. Acoustic delay
Because silica gel has a unique porous nanostructure, it can transmit sound in the pores. At this time, there will be a relatively large energy loss, which reduces the amplitude of sound waves and slows down the speed of sound. In addition, aerogels have relatively low transmission in solid materials. Speed, relatively large acoustic impedance propagation range, the silica aerogel prepared based on this has the advantages of corrosion resistance, aging resistance, and high temperature resistance. At this stage, silica aerogel can be used in ultrasonic detectors, acoustic instruments, and soundproof windows.
Luoyang Trunnano Tech Co., Ltd (TRUNNANO) is a professional silica aerogel supplier with over 12 years experience in chemical products research and development. We accept payment via Credit Card, T/T, West Union and Paypal. Trunnano will ship the goods to customers overseas through FedEx, DHL, by air, or by sea.
If you are looking for high quality silica aerogel powder, please feel free to contact us and send an inquiry.
