Five Characteristics of Silica Aerogels
Silica Aerogels is a very good thermal and thermal insulation properties of lightweight nano porous amorphous solid material, the porosity of up to 80-99.8%, the typical pore size of 1-100 nm, the specific surface area of 200- 1000 m2 / g, while the density can be as low as 3 kg / m3, and the room temperature thermal conductivity can be as low as 0.012 W / (m • k). It is because of these characteristics that Aerogels materials have a wide range of potential applications in thermal, acoustic, optics, microelectronics and particle detection.
Silica Aerogels Properties
1, heat insulation
The silica Aerogels material has a very low thermal conductivity of 0.013-0.016 W / (m · K), lower than the static air (0.024 W / (m · K)) thermal conductivity than the corresponding inorganic Insulation material 2-3 orders of magnitude lower.
The thermal conductivity is 0.043 W / (m · K) even at a high temperature of 800 ° C. High temperature does not decompose, no harmful gas release, is a green material. SiO2 silicone Aerogels with a variety of heat-resistant fiber composite, can be made of various forms of insulation materials. Can be widely used in industrial, construction, piping, automotive, aerospace and other fields.
2, sound insulation
It is also an ideal acoustic delay or high-temperature sound-proofing material due to the low sound velocity characteristics of silicone Aerogels. The acoustic impedance of the material has a wide range of variable (103-107 kg / m2 · s) and is an ideal acoustic impedance coupling material for ultrasonic detectors.
The preliminary experimental results show that the silicon Aerogels with a density of about 300 kg / m3 can increase the sound intensity by 30 dB as a coupling material. If the silicon Aerogels with a density gradient is used, a higher gain of sound intensity is expected.
3, non-linear optical properties
Due to the formation of quantum dot structure in the nanometer network of silicon aerogels, the results of chemical vapor infiltration method doped with Si and solution method doped with C60 show that the dopant is in the form of nano-crystalline grains and strong visible light emission is observed, It provides strong evidence for the quantum confinement effect of porous silicon. With the structure of silicon aerogels and the nonlinear optical effect of C60, a new type of laser protective goggles can be further developed.
4, filtration and catalytic properties
Nanostructured Aerogels can also be used as a new type of gas filtration, and other materials is different from the uniform distribution of the pore size, high porosity, is an efficient gas filtration material. Due to the material is particularly large than the plot. Aerogels as a new catalyst or catalyst carrier side also has broad application prospects.
5, refractive index adjustable Silicon Aerogels refractive index close to l, and the infrared and visible light annihilation coefficient of more than 100, can effectively penetrate the visible part of the sun and block the infrared part , Has become an ideal transparent thermal insulation material, which has been applied in solar energy utilization and building energy saving.
Click : http://www.silicaaerogelinsulation.com/News/ for more information
Silica Aerogels Properties
1, heat insulation
The silica Aerogels material has a very low thermal conductivity of 0.013-0.016 W / (m · K), lower than the static air (0.024 W / (m · K)) thermal conductivity than the corresponding inorganic Insulation material 2-3 orders of magnitude lower.
The thermal conductivity is 0.043 W / (m · K) even at a high temperature of 800 ° C. High temperature does not decompose, no harmful gas release, is a green material. SiO2 silicone Aerogels with a variety of heat-resistant fiber composite, can be made of various forms of insulation materials. Can be widely used in industrial, construction, piping, automotive, aerospace and other fields.
2, sound insulation
It is also an ideal acoustic delay or high-temperature sound-proofing material due to the low sound velocity characteristics of silicone Aerogels. The acoustic impedance of the material has a wide range of variable (103-107 kg / m2 · s) and is an ideal acoustic impedance coupling material for ultrasonic detectors.
The preliminary experimental results show that the silicon Aerogels with a density of about 300 kg / m3 can increase the sound intensity by 30 dB as a coupling material. If the silicon Aerogels with a density gradient is used, a higher gain of sound intensity is expected.
3, non-linear optical properties
Due to the formation of quantum dot structure in the nanometer network of silicon aerogels, the results of chemical vapor infiltration method doped with Si and solution method doped with C60 show that the dopant is in the form of nano-crystalline grains and strong visible light emission is observed, It provides strong evidence for the quantum confinement effect of porous silicon. With the structure of silicon aerogels and the nonlinear optical effect of C60, a new type of laser protective goggles can be further developed.
4, filtration and catalytic properties
Nanostructured Aerogels can also be used as a new type of gas filtration, and other materials is different from the uniform distribution of the pore size, high porosity, is an efficient gas filtration material. Due to the material is particularly large than the plot. Aerogels as a new catalyst or catalyst carrier side also has broad application prospects.
5, refractive index adjustable Silicon Aerogels refractive index close to l, and the infrared and visible light annihilation coefficient of more than 100, can effectively penetrate the visible part of the sun and block the infrared part , Has become an ideal transparent thermal insulation material, which has been applied in solar energy utilization and building energy saving.
Click : http://www.silicaaerogelinsulation.com/News/ for more information
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