What is Spherical alumina? Specular alumina is a kind of alumina powder material obtained by irregular high-purity alumina by calcination by high-temperature melting and injection after screening and purification. Specular alumina has high thermal conductivity, high insulation, hardness, high-temperature resistance, corrosion resistance, wear resistance and other properties. It has good fluidity, low oil absorption value, high sphericity rate, high α phase content, small specific surface area, controllable particle size distribution and other unique and excellent characteristics.
Main uses of Spherical alumina Specular alumina is widely used in thermal interface materials, thermal engineering plastics and aluminium-based copper cladding plates. Such as heat conductive silicone insert, heat conductive silicone grease, heat conductive adhesive, phase-change material; LED hood, switch housing, electronic product housing, electrical product heat dissipation components (heat sink, filler for heat dissipation substrate, MC substrate); high-power LED circuit board, power circuit board; can also be used for ceramic filter; as silicone heat dissipation binder and filler for a mixture. Main features of spherical alumina: Silica gel and epoxy have high spherical ratios and controllable particle size distribution with a spherical appearance of spherical alumina, good dispersion in the system, and high thermal conductivity of thermal products. With a spherical alumina appearance, the wear of the mixer, forming machine and other equipment is reduced, which can extend the life of the equipment. What are the main preparation methods for spherical alumina? The sol-gel method is formed by hydrolysis or polymerization, Then alcohol washing, aging and finally calcination to obtain alumina powder, Using this method, the pH and the reactant concentration of the system should be accurately controlled; The sol-emulsion-gel method was developed on the basis of the sol-gel method, early stage, The sol-gel method is mostly used to prepare the alumina sol, More about studying the tissue structure of the obtained colloid, generally, This method becomes a common method for preparing ultrafine powder, To obtain the spherical powder particles, Tiny spherical droplets can be made using the interfacial tension between oil phase and water, The formation and gelation are confined in tiny droplets, Finally to obtain the spherical precipitation particles; The drip method involves alumina sol droplets into the oil layer (usually paraffin, Mineral oil, etc.), Form the spherical sol particles by the action of the surface tension, The sol particles were subsequently gelated in an aqueous ammonia solution, Finally, the gel particles are dried and calcined to form a spherical aluminamethod. This method is a further improvement of the sol-emulsion-gel method in the process. The emulsion technology is applied to the ageing stage of the sol, and the oil phase is kept motionless, eliminating the separation of powder and oil reagent. Price of Spherical alumina The different price of Spherical alumina purity is also different. The market price of Spherical alumina is in the process of dynamic change. The price of Spherical alumina can be found on our company's official website. If you need it, you can ask us at any time. Spherical alumina supplier Luoyang Tongrun Nano Technology Co. Ltd. (TRUNNANO) Luoyang City, Henan Province, China, is a reliable and high-quality global chemical material supplier and manufacturer. It has more than 12 years of experience providing ultra-high quality chemicals and nanotechnology materials, including molybdenum Silicide, nitride powder, graphite powder, sulfide powder, and 3D printing powder. If you are looking for high-quality and cost-effective Spherical alumina, you are welcome to contact us or inquire any time.
