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In the process of powder storage, transportation and use, it is often hoped that the nano-aluminum powder exhibits low activity and is less affected by external environmental factors (temperature, humidity, etc.), so that the product has stable performance for a long time. On the other hand, it is desirable to exhibit high activity in solid rocket propellants to obtain high energy release rate and...
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Boron carbide, also known as black diamond, is an inorganic substance with a chemical formula of B4C, usually a gray-black micropowder. It is one of the three hardest known materials (after diamond and cubic boron nitride) and is used in tank armor, body armor and many industrial applications. It has a Mohs hardness of about 9.5. Black glossy crystals. The hardness is lower than that of industrial...
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Boron carbide, also known as black diamond, is an inorganic substance with a chemical formula of B4C, usually a gray-black micropowder. It is one of the three hardest known materials (after diamond and cubic boron nitride) and is used in tank armor, body armor and many industrial applications. Several preparation methods of nano-boron carbide (supply 100-200nm): 1. Carbothermal reduction method Be...
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1 Modified high-strength new material Nano SiC powder particles have good compatibility in polymer composite materials, good dispersion and good basic bonding, the tensile strength of modified high-strength nylon alloy is more than 100% higher than that of ordinary PA6, and the wear resistance is improved by more than 2.5 times. Users have responded well. It is mainly used for polymer parts of arm...
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Nano WO3 has a large specific surface area and a significant surface effect, and is a good catalyst, which can be used as both a main catalyst and a co-catalyst, and has a high selectivity for the reaction. WO3 has a strong ability to absorb electromagnetic waves, and can be used as an excellent solar energy absorbing material and a recessive material. WO3 is an n-type semiconductor material with ...
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Nano zinc oxide is a good vulcanization activator. Since nano-zinc oxide can be combined with rubber molecules at the molecular level, it can improve the performance of the rubber compound and improve the characteristics of the finished product. Take radial tires and other rubber products as examples. The use of nano-zinc oxide can significantly improve the thermal conductivity, wear resistance, t...
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Nano zirconia has important application value in national defense, electronics, high-temperature structural and functional ceramics, especially in high-tech fields such as surface coatings. The unique low thermal conductivity of nano-zirconia is an excellent material for thermal insulation coatings to improve the thermal insulation effect. Its high corrosion resistance, high hardness and high wear...
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The application in plastics utilizes the high strength, high fluidity and small size effect of silica, which can improve the compactness, smoothness and wear resistance of plastic products. Through appropriate surface modification, the purpose of strengthening and toughening plastics can be achieved at the same time. By adding fumed silica into polyethylene, through a special method, the silica ca...
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Due to the extremely strong surface activity of nano TiO2, it is easy to form large-sized agglomerates, which affects the practical application. Therefore, it can be modified from the aspects of improving the photocatalytic degradation efficiency of TiO2, changing the dielectric constant and surface activity of TiO2. There are two ways of combining surfactants with TiO2: one is physical adsorption...
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Nano zinc oxide is a fine inorganic material with a particle size between 1nm and 100nm. Zinc oxide usually exists in the form of wurtzite, with four oxygen atoms surrounding the zinc ion, forming a thermodynamically stable tetrahedral structure. Due to the changes in the crystal structure and surface electronic structure of nano-zinc oxide, nano-zinc oxide has the characteristics of surface effec...
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Dispersant is a kind of surfactant that has two opposite properties of lipophilicity and hydrophilicity in the molecule. It can increase the compatibility of oily and aqueous components in the same system, and also prevent the sedimentation and agglomeration of particles, forming an amphiphilic reagent required for stable suspensions. Dispersant, also known as wetting dispersant, has many kinds. A...
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The formation of a stable dispersion system, in addition to using electrostatic repulsion, that is, the negative charges adsorbed on the surface of the particles repel each other, to prevent the adsorption/aggregation between particles and finally form large particles and stratify/settlement, but also use. The theory of the steric hindrance effect, whereby particles that have adsorbed negative cha...
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