[Haichuan Chemical Salary News] Saiding Engineering signs a turnkey contract for new type of nano-silica aerogel with Shanxi Yangzhong
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Saiding Engineering signed a turnkey project contract with Shanxi Yangzhong. On the afternoon of October 29th, the signing ceremony for the turnkey contract for the Project on the Application Research and Industrial Demonstration of New Nanosilica Aerogel Technology (Phase I) carried out by Shanxi Yangzhong New Materials Co., Ltd. was held at Saiding Engineering Co., Ltd. Yan Shaowei, Deputy Secretary of the Party Committee and General Manager of Saiding Company; Wang Haibo, Chairman of Shanxi Yangzhong New Materials Co., Ltd.; Wang Jing, General Manager of Beijing Zhongrong Guokong Capital Investment Management Co., Ltd.; Zhao Botao, Chief Engineer of Yangquan Coal Industry Group Pingding Chemical Co., Ltd., among other leaders, as well as staff from various functional departments of Saiding Company, attended the signing ceremony. Aerogels are among the top ten revolutionary new materials in the world. Thanks to their nano-porous structure, they have a porosity of 80–99.8%, and their thermal conductivity at room temperature can be as low as 0.013 W/(m•K). They represent the best insulating materials available to date, and have broad application prospects in fields such as aerospace, petrochemicals, power metallurgy, ships and vehicles, precision instruments, refrigerators and cold storage, clothing and tents, as well as building energy efficiency. They serve as a revolutionary alternative to traditional insulating materials. This project is the first major initiative undertaken by Yangquan Coal Industry Group in its transition away from coal mining, and upon completion, it will become the world’s largest aerogel production facility.
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What is an aerogel? Is it similar to polyurethane?
Silica aerogel is a lightweight, nano-porous amorphous solid material with excellent thermal insulation properties. It has a porosity of 80–99.8%, with typical pore sizes ranging from 1 to 100 nm; its specific surface area is 200–1000 m2/g, and its density can be as low as 3 kg/m3. The thermal conductivity at room temperature can be as low as 0.012 W/(m·K). It is precisely these properties that give aerogel materials broad application potential in thermology, acoustics, optics, microelectronics, and particle detection.
It is actually an aerogel used for insulation. Properties of silica aerogel: 1. Thermal insulation: Silica aerogel materials have an extremely low thermal conductivity, ranging from 0.013 to 0.016 W/(m·K). This value is lower than that of still air (0.024 W/(m·K)), and it is 2–3 orders of magnitude lower than that of corresponding inorganic insulating materials. Even at a high temperature of 800°C, its thermal conductivity is only 0.043 W/(m·K). It does not decompose at high temperatures, releases no harmful gases, and is a green, environmentally friendly material. SiO2 silica aerogels, when combined with various heat-resistant fibers, can be used to create insulation materials in various forms. It can be widely used in industries such as manufacturing, construction, piping, automotive, and aerospace. 2. Sound insulation Due to its low sound speed, silicon aerogel is also an ideal material for acoustic delay or high-temperature sound insulation. The acoustic impedance of this material has a wide range (103–107 kg/m2·s), making it an ideal acoustic coupling material for ultrasonic detectors. Preliminary experimental results show that silicon aerogel with a density of around 300 kg/m3, used as a coupling material, can increase sound intensity by 30 dB; higher sound intensity gains can be expected if silicon aerogel with a density gradient is used. 3. Nonlinear optical properties Due to the formation of quantum dot structures within the nanonetwork of silicon aerogels, results from Si doping via chemical vapor infiltration and C60 doping via solution method show that the dopants exist in the form of nanocrystals. Strong visible light emission was observed, providing strong evidence for the quantum confinement effect-induced luminescence in porous silicon. By utilizing the structure of silicon aerogel and the nonlinear optical effects of C60, new types of laser protection goggles can be developed further. 4. Filtration and catalytic properties Nanoscale aerogels can also be used as advanced gas filters. Unlike other materials, they have a uniform distribution of pore sizes and a high porosity, making them effective materials for gas filtration. Due to the particularly large specific surface area of this material. Aerogels also hold great promise for use as novel catalysts or carriers for catalysts. 5. Refractive index tunability: The refractive index of silicon aerogel is close to 1, and the ratio of its absorption coefficients for infrared light to visible light is over 100. This allows it to effectively transmit the visible light component of sunlight while blocking the infrared component, making it an ideal transparent thermal insulation material. It has been utilized in solar energy applications and building energy conservation.
[Haichuan Chemical Sharing] Application of Silica Aerogel Felt in Direct-Buried Steam Pipes https://bbs.hcbbs.com/thread-2155666-1-1.html (Source: Haichuan Chemical Forum Website)
Silica aerogel? Is there also fumed silica? These are things with similar sensations, but their uses differ greatly
Is there a production process for silica aerogels? Could you give some introduction?
Aerogels are no longer considered new materials; they are being used more and more in the field of insulation
There are many online; you can search for them