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When the size of the nano-ferric oxide particles is reduced to the nanometer order, due to the small size effect, surface effect, quantum size effect and macroscopic quantum tunneling effect of the nanoparticles, it has a special difference from the conventional bulk materials. Magnetic properties. This also makes it have special applications in the fields of industry, biomedicine and so on. 1.Mag...
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Preparation of kerosene-based magnetic fluid of Fe3O4 In this experiment, analytically pure ferric chloride, ferric chloride and ammonia (NH3 content 25%) were used to prepare magnetic particles of Fe3O4 according to chemical coprecipitation method. The chemical reaction equation is 2FeCl3·6H2O+FeCl2·4H2O+8NH3·H2O= Fe3O4+8NH4Cl+24H2O (1) In the dissolution process, FeCl2·4H2O blue-green crystals a...
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Ferric oxide Nanopowder is a crystal, and its internal molecules are arranged in a regular manner, and the molecular current orientation is uniform, resulting in magnetic properties. When the magnet is brought close to the ferromagnetic substance, it is magnetically affected by the magnet, and the internal molecular current of the ferromagnetic substance tends to be regularly oriented and mag...
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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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First, capsule modification Capsule modification is a surface modification method in which a film of a uniform thickness and a film having a certain thickness is coated on the surface of the powder particles. Rong et al. encapsulated TiO2 composite particles coated with Al2O3 and SiO2 with polystyrene, which effectively improved the absorbance and stability of the material. Zhu Liqun and other met...
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Nano alumina water dispersion is our company adopts international advanced dispersion technology to disperse nano-alumina powder (20-30nm) in water phase medium to form highly dispersed, homogenized and stabilized nano-alumina water dispersion. liquid. In addition to the characteristics of aluminum oxide water dispersion, nano alumina water dispersion has the characteristics of higher activity and...
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Cobalt oxide powder mainly contains CoO, Co2O3, and Co3O4. High-grade cobalt oxide containing more than 74% cobalt is brown, and cobalt oxide containing 74% or less cobalt is black. According to its use and chemical composition, according to national standards, refined cobalt oxide powder is mainly divided into two series of Y and T, and Y products are divided into three brands of Y0, Y1, and Y2, ...
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In our daily life, we often use various forms of magnets, and many people with magnetic liquids have definitely not seen them. Magnetic fluid is a kind of magical liquid. In short, it is a fluid-like substance with magnetism. It is covered with spikes and can change shape with magnetism at will, just like magic. Magnetic fluid is a colloidal liquid composed of magnetic solid particles, carrier liq...
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First. Principle of magnetic fluid sealing Magnetic fluid has both liquid fluidity and solid magnetic properties. The magnetic fluid sealing technology is realized by utilizing the responsiveness of the magnetic liquid to the magnetic field. When the magnetic fluid is injected into the gap of the magnetic circuit composed of high-performance permanent magnets, pole shoes with good permeability, an...
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What is a thermally conductive gel? Thermally conductive gel: It has some advantages of thermally conductive silicone sheet and thermally conductive silicone grease, while making up for some of the weaknesses of the two; strong plasticity, can fill uneven interfaces. What are the advantages of thermal gel? 1. Efficient thermal conductivity; 2. Low compressive force application and low stress; 3. H...
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As a product with a wide range of performance, high temperature alumina can be used in many different industries, including the application in catalysts. However, in order to achieve the specified use standard, it can be carried out according to the operations specified below. 1. Adsorbents: This type of carrier is a porous substance with a large specific surface area. High temperatur...
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Studies have shown that laser energy density can process tungsten materials into good functional parts, and 3D printing can provide new application opportunities for tungsten materials to produce parts with high precision and complexity. Tungsten is a compact and strong metal. Because of its excellent corrosion resistance, it has been widely used in many fields such as chemical industry. However, ...
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