Hexagonal boron nitride (h-BN) is a white ceramic material with a layered structure similar to graphite. It is a raw material for cosmetics and various industrial applications owing to its good lubricity, heat resistance, electrical insulation properties, and thermal conductivity1, 2). Because h-BN has high thermal conductivity, a low dielectric constant, and excellent stability (hygroscopicity resistance) compared with other ceramic materials used for heat dissipation parts such as heat dissipation insulation sheets and heat dissipation substrate materials, it is a promising filler material. Using an organic binder, we originally produced an aggregate BN powder (FS-3) by granulating planar BN powder particles in a spherical shape, followed by high-temperature synthesis. Recently, we reviewed the raw materials and production method to improve the filling property in resins and developed a new series of aggregate BN powders (HP-40 Series) with added high crystallinity, an appropriate void ratio, and a disaggregation property by forming the aggregated state by high-temperature synthesis followed by crushing. Photo 1 shows SEM images of an aggregate BN powder (HP-40MF100). As features of the developed products, the particles that comprise HP-40 are thicker and have a smaller aspect ratio than the planar particles that made up the original granulated aggregate powder (FS-3).
For this reason, the developed product has a structure that enables easy filling of resins compared to the coarse aggregate powder. A suitable disaggregation property improves heat dissipation. The composition, particle size, property values (representative values), and SEM images of the aggregate BN powders sold by Mizushima Ferroalloy. The aggregate BN powders sold by this company are the HP-40, as mentioned earlier, Series, and FS-3 with planar particles granulated to a spherical shape. The HP-40 Series includes HP-40MF100 and HP-40J2, in which the particle size of the aggregate powder is adjusted by crushing, classification, etc., after high-temperature synthesis, and HP-40J11 has constituent particles pulverized to the size of constituent particles. If you are looking for high quality, high purity, and cost-effective Boron Nitride, or if you require the latest price of Boron Nitride, please feel free to email contact mis-asia.
