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Silicon nitride Si3N4 is a non-oxide high temperature ceramic structural material. Powdered Si3N4 can be prepared by reacting a mixture of SiCl4 vapor and NH3 gas. Powdered Si3N4 is unstable to air and water. Powdered Si3N4 can form a pungent odor, a gas commonly used as a refrigerant and a poorly soluble acid when it is in contact with water. Powdered Si3N4 can generate N2 and contact with air. a...
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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 gold we usually see is golden yellow, but the nano gold powder is pink; the iron can not be ignited at normal temperature, but the nano iron powder can ignite. Why did these metals become tiny nanoparticles and the properties changed completely? Now let's take a closer look at the skills of nano gold particles and see how they have wonderful functions. 1.Smart microcircuit Behind the LCD scree...
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The purpose of surface modification of ultrafine powder is: 1. In order to improve or change the dispersibility of powder particles; 2. Improve durability, such as resistance, light resistance, heat resistance, weather resistance, etc.; 3. Improve particle surface activity; Adding new physical, chemical and mechanical properties and new functions to the surface of the particles to increase the add...
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Silicon carbide whiskers are a kind of single-crystal fiber with a certain length-to-diameter ratio, which has very good high temperature resistance and high strength. It is mainly used in toughening applications where high temperature and high strength applications are required. Such as: aerospace materials, high-speed cutting tools. At present, it has a very high performance-price ratio. Silicon...
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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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Preparation method and introduction of nano silicon carbide powder infrared radiation coating 1.1 Ingredients Powder radiant mixture: 40 to 80 parts by weight of nano SiC (SiC) powder raw material, and zirconia (ZrO2) powder raw material 5 to 30 based on the weight fraction of (D50 is 40 nm, β phase) nano SiC powder raw material. 5 parts by weight or less of chromium oxide (Cr2O3) powder raw mater...
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Boron carbide chemical formula B4C. Glossy black crystals with a relative density of 2.52, a melting point of 2350 ° C, and a boiling point above 3500 ° C. Chemically stable, insoluble in water and various acids, soluble in molten alkali. Harder than diamond but higher than silicon carbide, Mohs hardness is 9.3. High thermal neutron capture ability, wear resistance, and semiconductor conductivity....
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Particle size D 0.1 ～ 2.5μm, length 10-50um, purity 99+, gray-green. Silicon carbide whisker is a kind of high-strength whisker-like (one-dimensional) single crystal with many excellent mechanical properties such as high strength and high modulus. Mainly used in ceramics, high-temperature components in the aerospace field, main strong bearing blocks, large mud pumps, etc. Physical characteristics:...
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Nano silica dispersion, silicon oxide dispersion is translucent liquid, mainly used in coatings, refractory materials, textile industry, etc., with water resistance, fire resistance, scrub resistance, stain resistance. After the nano-silica is dispersed into a liquid, the appearance varies from white milky to colorless and transparent according to different dispersion systems. After the nano-silic...
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Boron carbide, also known as black diamond, has a molecular formula of B₄C, usually grayish black powder. It is one of the three hardest materials known (the other two are diamond, cubic phase boron nitride), used in tanker armor, body armor, and many industrial applications. Its Mohs hardness is 9.3. Hard black shiny crystals. Harder than industrial diamond, but higher than silicon carbide. Compa...
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Tungsten carbide powder (WC) is the main raw material for the production of cemented carbide, chemical formula WC. The full name is Wolfram Carbide. Tungsten carbide powder is a black hexagonal crystal with metallic luster, hardness similar to diamond, and a good conductor of electricity and heat. The melting point is 2870 ° C, the boiling point is 6000 ° C, and the relative density is 15.63 (18 °...
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