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Alumina ceramics is a structural ceramic material with a-Al2O3 as the main crystal phase. Because of its high melting point, high hardness, heat resistance, corrosion resistance, and electrical insulation characteristics, it can be used under harsher conditions . The price of alumina ceramics is low, and the production process is mature. It is currently one of the ceramic materials with the larges...
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Nano zinc oxide and nano titanium oxide are two important and widely used physical sunscreens. Their principle of shielding ultraviolet rays is to absorb and scatter ultraviolet rays. Because they are all N-type semiconductors, the band gap of rutile nano-titanium oxide is 3.0 eV, and the band gap of nano-zinc oxide is 3.2 eV. When irradiated by ultraviolet rays, electrons in the valence band can ...
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1.Degrade harmful organic matter in the atmosphere With the advancement of human science and technology, industrial development has become increasingly large, and it has also brought serious air pollution problems, among which serious pollutants are N0, H2s, and SO. , Volatile Organic Compounds (VOCS), etc., they can cause a series of major disasters such as photochemical smog, acid rain, ozone la...
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Nano TiO2 properties and photocatalytic properties Nano titanium dioxide has the characteristics of small size effect, high specific surface effect and high chemical activity of nano materials, and has high photocatalytic performance. Nano titanium dioxide is popular for its advantages such as low price, suitable forbidden band width, large specific surface area, high chemical stability, strong re...
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Nano alumina has special mechanical and chemical properties, such as high chemical stability, high hardness, high temperature wear resistance and corrosion resistance, etc., and can be used as the enhanced second phase of the metal matrix composite to be applied to the surface of the device, thereby improving its resistance Wear and corrosion resistance. The results of X-ray diffraction analysis a...
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In order to explore the ultraviolet protection performance of nanofibers, the ultraviolet shielding nano titanium dioxide (TiO2) was added to the polyacrylonitrile (PAN) solution, and pure PAN and composite PAN/TiO2 nanofiber membranes were prepared. Scanning electron microscopy and UV transmittance analysis were used. The instrument analyzed the microscopic morphology and UV protection performanc...
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Objective: To prepare a polishing slurry of α-Al2O3 nanoparticles with good dispersion stability; to improve the chemical mechanical polishing performance of sapphire; Disperse α-Al2O3 in different dispersing media such as silica sol, cerium oxide sol, water, etc.; prepare a polishing slurry of α-Al2O3 nanoparticles under conditions of different pH, different silica sol concentration and silica so...
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Vanadium dioxide (VO2) is a binary oxide with a strongly correlated electronic system. Due to the strong interaction of its internal electrons, orbits, crystal lattices and spins, local electronic and crystal structure changes caused by small external stimuli can be sufficient. Induce VO2 to undergo a reversible metal-insulator phase transition. Along with the phase change, the crystal structure, ...
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Nano bismuth trioxide Bi2O3 is an important functional material, which mainly exists in four crystal forms: α, β, γ and δ. Different crystal forms have different applications. The application of bismuth oxide is very wide. It is not only a good organic synthesis catalyst, ceramic coloring agent, plastic flame retardant, medicinal astringent, glass additives, high refractive glass and nuclear engin...
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