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As the anode material of lithium ion battery, silicon nanopowder has the highest theoretical specific capacity (up to 4200 mAh/g), which is much higher than the carbon powder widely used at present, but the biggest disadvantage of silicon powder as the negative electrode of lithium ion battery is the process of alloying with lithium. In the case of a large volume change, the active material is det...
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Specification of titanium dioxide nanopowder: The particle size is very small: an average particle size of 5 nm. Good dispersion performance: 5 nm titanium dioxide has good dispersibility and can be self-dispersed into pure water without stirring. The dispersed liquid can be sprayed onto the surface of the furniture and the wall to form a uniform nano-coating to purify the indoor air. High catalyt...
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The addition of nano SiO2 powder as an admixture to cement-based materials can improve many of the properties of cement-based materials. A large number of research results show that adding appropriate amount of SiO2 nanopowder to cement-based materials, due to the volcanic ash effect of nano SiO2 particle, nucleation effect and micro-filling effect, can significantly improve the early strength of ...
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Titanium diboride nanopowder has the characteristics of high melting point and high hardness, and is resistant to molten metal corrosion, and is often used for preparing composite ceramics. A*STAR (Agency for Science, Technology and Reseach), Singapore's largest research institute, has successfully improved the strength and thermal properties of materials by adding titanium diboride to nickel-base...
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New energy vehicles, communications and portable devices require lithium-ion batteries for high capacity and high endurance. Lithium-ion batteries urgently need to be updated to increase capacity, cycle and size. At present, the silicon-carbon negative electrode of lithium battery is all kinds of carbon materials mainly composed of graphite, and its theoretical capacity is only 372 mAh/g. In pract...
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Since ultrafine powder has surface effect, small size effect, quantum effect and macroscopic quantum tunneling effect, it has many special properties in catalytic, optical, magnetic and mechanical properties compared with crystalline materials of the same composition. There are many important applications in the fields of medicine, microelectronics, and nuclear technology. "Plasma milling" refers ...
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The application of nanomaterials in surface engineering is mostly to stabilize the nanoparticle dispersion in the organic medium. For example, the workpiece is ground and the antifriction material is dispersed in the lubricating oil in an appropriate manner. The ultrafine polishing liquid is nanometer SiO2, nanometer. Lubricants for nanoparticles such as Al2O3, nano-MoS2, nano-Cr2o3, and nano-diam...
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Titanium is a chemical element, chemical symbol Ti, atomic number 22, located in the fourth cycle of the chemical periodic table, group IVB. It is a silver-white transition metal characterized by light weight, high strength, metallic luster and resistance to wet chlorine gas. The most common compound of titanium is titanium dioxide, which can be used to make white pigments. In the past, people use...
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Nano-zero-valent iron (nZVI) nanopowder is an iron particle with a particle size between 1 and 100 nm. Its specific surface area and reactivity are much larger than ordinary iron filings and iron powder. It can be directly injected into the heavily polluted area of the water environment to form an efficient in-situ reaction zone, which can control water pollution flexibly, efficiently and at low c...
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The granular shape of titanium powder includes spherical, polygonal, sponge, and flake shapes. The granular shape is related to the method of preparing titanium powder. The requirements for titanium powder generally include three aspects, namely purity, particle size and granular shape. Titanium powder is divided into 4 grades. The size of 1000-50um is coarse powder, 50-10um is fine powder, 10-0.u...
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Nano titanium dioxide transparent dispersion adopts international advanced dispersion technology to disperse nano-titanium dioxide powder (5-30nm) in aqueous phase medium to form highly dispersed, uniform and stable nano-titanium dioxide aqueous transparent dispersion. In addition to the characteristics of nanometer titanium dioxide transparent dispersions, nanometer titanium dioxide transparent d...
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A photocatalyst is also called photocatalysis. Simply, a photocatalytic material undergoes light irradiation and does not change itself but can promote other substances to undergo a chemical reaction. There are many examples of photocatalyst reactions around us. The most typical is The chlorophyll, which plays the most important role in photosynthesis of plants, is a photocatalyst. Photocatalysts ...
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