The main force of thermal conductive fillers - alumina

Thermal conductive fillers are fillers added to the matrix material to increase the thermal conductivity of the material. The commonly used thermal conductive fillers include alumina, magnesium oxide, zinc oxide, aluminum nitride, boron nitride, silicon carbide, etc. Among them, micrometer sized alumina and silicon micro powder are widely used. In practical applications, nano alumina and nitride are mostly used as filling powders in the field of high thermal conductivity; Zinc oxide is mostly used as a filler for thermal conductive paste (thermal conductive silicone grease); Fiber like high thermal conductivity carbon powder and flake like high thermal conductivity carbon powder are commonly used in special fields such as aerospace, LED, and precision electronic instruments. Today we will focus on the main force of thermal conductive fillers - alumina.

Aluminum oxide has the advantages of thermal conductivity and insulation, and can be used as a thermal conductive filler to prepare polymer materials such as thermal insulation adhesive and sealing adhesive. Compared with other fillers, although the thermal conductivity of alumina is not high, it can basically meet the application requirements of fillers in the fields of thermal interface materials, thermal engineering plastics, and aluminum based copper clad plates. Moreover, alumina has a low price and a wide range of sources, making it an economically applicable filler for high thermal conductivity insulating polymers.

Thermal conductive alumina is a white powder crystal generated under high temperature conditions, with numerous crystalline powders. The alumina used for thermal conductivity includes spherical alumina, spherical alumina, composite alumina, etc. Thermal conductive alumina must have narrow particle size distribution, good particle size stability, high thermal conductivity K value, and high filling fraction after coupling modification. Generally speaking, if the average particle size of thermally conductive alumina can be controlled within a reasonable range, the thermal conductivity can reach between 3-10W/(m * K) depending on different filling amounts.

Thermally conductive alumina can be widely used in different materials such as silicone, sealing adhesive, epoxy resin, plastic, rubber thermal conductivity, thermal conductive plastic, silicone grease, heat dissipation ceramics, etc. In practical applications, Al2O3 powder fillers can be used alone or mixed with other fillers such as AIN, BN, etc.

The above is the relevant content about alumina organized by alumina manufacturer Yangzhou Zhongtianli, hoping to provide some help to everyone. If you would like to learn more about alumina, please feel free to contact us. Yangzhou Zhongtianli New Materials Co., Ltd. is a technology enterprise specializing in the production of isopropanol aluminum, isopropanol aluminum trimer, secondary butanol aluminum, pseudo boehmite, high-purity arsenic, high-purity aluminum oxide, etc. It has multiple technologies and has received unanimous praise in the industry.