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    What is Alumina Nanoparticle used for?

    The coating material for the lithium battery's diaphragm is High purity micro alumina. This ceramic coating acts as heat resistance and insulation to protect the battery from being shorted by high temperature or diaphragm melt.

    Additional ingredients for lithium battery cathode materials:
    Doped with lithium cobalt, lithium manganate, high-purity nanoalumina can increase thermal stability and cycle performance, prevent the formation of oxygen, the decomposition LiPF6, and reduce direct contact between LiCo02 (electrolyte) and LiCo02. It also increases the electrochemical specificity of LiCoO2.

    Catalyst:
    A porous material with high purity of g type nano-alumina has a surface area of many hundred of meters per gram. It also exhibits high activity and strong absorption capabilities. It's a common adsorbent, catalyst, and carrier in the petroleum refining, petrochemical, and oil industry.

    Powder coating Anti-caking:
    Summer can be prevented by nano-alumina. The use of nanometer aluminum trioxide in powder coatings is a great way to improve powder coatings' fluffiness. It also has a good anti-caking property. This powder coating is stable in extreme temperatures or high humidity environments.

    Hardening and wear-resistant coating for rubber or plastics:
    Nano-alumina can increase the durability and resistance to scratches of the coating by adding between 2-50%. The paint can have a fine network structure that protects the paint's surface from scratches and wear by adding nano-alumina to it. The scratch resistance of nanopaint is three times better than original paint. This paint is commonly used for automobile paints, such as the GM-Aluminum Trioxide. A nano-aluminum triooxide is able to significantly increase the hardness and can even reach as high as 6-7H. It does not affect the transparency of coating.

    Plastics, rubber, adhesives, paint thermal conductivity:
    One crystal Alumina thermal conductivity (30 nanometers alumina), high thermal conductivity, large-spherical filling. Surface treatment agents like coupling agents can be used to improve thermal conductivity. They are often used in order to improve compatibility with resin matrix fillers and other matrix materials.

    Ceramic:
    High purity and uniform size of the nano-alumina particles make it a great choice for dispersion. If 10% of alumina is added into the sintered ceramics it increases the forming pressure, which may reduce the number pores. This can also increase the density of ceramic blanks.

    Powdermetallurgy
    The nano alumina used in metallurgy is small in size with a high specific surface area.

    Polishing:
    These alumina particles have uniform sphericity and can be used for polishing. Polishing zinc is fast, bright, and without scratches.

    Aluminum Oxide Price
    Price is affected by many things, such as the demand and supply in the market and industry trends. Economic activity. Unexpected events.
    Send us an enquiry if you want to know the current al2o3 price. (brad@ihpa.net)

    Aluminum Oxide Supplier
    Technology Co. Ltd. (), is a trustworthy Al2o3 supplier , and manufacturer . We have over 12 years experience. All of our products can be shipped worldwide.

    Premium HTML2O3 Powder - Please Contact Us for a quote. (brad@ihpa.net)

    2023-03-04

    Blog

    Optical coating materials

    An optical coating is the application of one (or several) metallic (or dielectric), films to an optical part's surface. A coating applied to the optical part's surface is used to increase or decrease the intensity of the reflection, beam, color, and polarization. One of the most popular coatings is vacuum coating, and electronicless coating.

    Principle of optocoating:
    Vacuum coating:
    Vacuum coating refers to coatings that must be done in higher vacuums, such as vacuum ion, magnetron, magnetron, molecular beam epitaxy and PLD laser-sputtering. A substrate is formed from the plated materials and electroplated material. The target and substrate are in the same vacuum.

    The evaporation coating is usually the target of heating so that the surface components evaporate in the form of free radicals or ions and are deposited on the surface of the substrate by film-forming method (scattering island structure-trapezoidal structure-layered growth).

    Sputtered coat
    You can easily understand the process of sputtered coating. It involves bombarding the target material with electrons or high energy lasers. Finally, the surface components are sputtered under the form free radicals orions. This forms a thin film.

    An optical film has a smooth top, a geometrically-segmented interface between the layers, and a jump in refractive index at the interface. But it's continuous within the film which could be transparent, or optical.

    The absorption medium can be either uniformly normal or not. Practical application of the film can be more difficult than an ideal one. Because of its optical and physical characteristics, it is different from bulk material. Its surface and interface are also rough which causes diffuse scattering. Due to mutual penetration, the films form a diffusion interface. The anisotroy is formed by the film's growth, structure, and stress.

    Common optical coating materials include the following:
    1. Metal (alloy): germanium, chromium, aluminum, silver, gold, etc.
    Germanium.
    This rare metal is safe and non-radioactive. It has a light transmission range of 2000NM to 14000NM.

    Chrome.
    Useful in spectroscopes, and often used to boost adhesion. It may range from 550NM to 30NM. But, under the guidance of aluminum mirror, 30NM can be an effective value to increase adhesion.

    Aluminium.
    It is the most reflective metal in the ultraviolet area. Effective thickness of the film exceeds 50NM.

    Silver.
    When the evaporation rate and substrate temperature are fast enough, silver will have the same high reflectivity of aluminum. This is because there is more absorption due to the massive accumulation that occurs at very low speed.

    Gold.
    Material with highest reflectivity of all known materials is above infrared 100nm wavelength

    2. Oxides.
    Yttrium trioxide.
    By electron gun evaporation the property of the material changes with film thickness. The refractive index, which is approximately 1., can be used. 8 % at 500 nm. It's very well-known as an aluminum protective coating, in particular due to its high incident angle at 800-12000nm.

    Cerium dioxide.
    High-density tungsten boat evaporates cerium dioxide on a substrate of 200°C to get a refractive Index of about 2.2. The absorption band is located at about 3000nm, and its refractive indice changes with temperature. Oxygen ion plating can produce nylon 2.35 (500nm), which is a low absorption thin film.

    titania.
    The refractive Index is defined as the light transmission range between 2.21500 and 3.15500nm. People love this material because of its high refractive and relative firmness. It is used for anti-reflection films, splitter film cold light film filter, filter, high reflect film, glasses film, thermal mirror and other purposes.

    Silicon dioxide.
    It is a transparent colorless crystal with a high melting point, hardness, and chemical stability. Use it for high-quality Si02 coatings. It has a very pure crystal with no melting point. You can divide it into infrared, visible and ultraviolet depending on your use. A film will become porous and fragile if it is exposed to too much pressure. Conversely, a film with too little pressure will absorb the light and increase its refractive index.

    Zirconium dioxide.
    High refractive index, high resistance to temperature and chemical stability make the white heavy crystal very pure. You can use it for high quality zirconia coatings. Because of its roughness, the incident light will be diffused and the transmittance of your lens is reduced. Additionally, optical rotation will cause certain incident light sources to dissipate particularly strongly. One example is that a material which absorbs red light appears green. But, poor processing can still be avoided.

    Hafnium oxide.
    If the substrate is heated to 150C by an electron gun, its refractiveindex is approximately 2.0C. Oxygen ion assisted plating can achieve a stable refractiveindex of 2.5-2.1. In the region of 8000-12000NM, HFO2 works better than SiO2 for the protective outer layer.

    3. Fluoride.
    Magnesium fluoride.
    This antireflective coating has a 1x4 wave thickness and is used widely as an optical glass. It transmits about 120NM true ultraviolet radiation to the middle-infrared region at about 7000nm.

    Calcium fluoride or barium fluoride.
    The only problem with their compactness is that they are not completely solid. They can be used only in infrared films because transmittance shifts towards longer wavelengths at higher temperatures.

    Lead fluoride.
    This material can also be used in UV. If it's used at 300nm the refractive indice decreases when it gets in touch with molybdenum or tantalum. Therefore, platinum and ceramic dishes are required.

    4. Additional compounds
    Zinc sulfide.
    Light transmission ranges with refractive indices of 2.35400-13000m have good durability and stress. This film is mostly used for spectroscopic and cold light films, as well as filter, high reflective, and infrared films.

    Lead Telluride.
    It's an IR material of high refractive. Because it's a thin-film material, transparency is possible in between 300 and 4000NM. The material is sublimated in the infrared. Substrat temperature is 250C. Prevention is essential. The maximum range of 40000NM is sufficient to make it work. Many other materials can be used to create a 14000NM edge.

    Silicon dioxide Price
    Price is affected by many things, such as the demand and supply in the market and industry trends. Economic activity. Unexpected events.
    For the current SiO2 prices please send an inquiry. (brad@ihpa.net)

    Silicon dioxide Supplier
    Technology Co. Ltd. (), is a respected siO2 manufacturer, and siO2 supplier. It has over twelve years' experience. All of our products are available for shipment worldwide.

    Feel free to email us for a high-quality siO2 powder. (brad@ihpa.net)

    2023-03-03

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