What is the application of boron nitride ceramics?
2020 08/10
The obvious chemical inertness at high temperature makes the boron nitride coating can be used to protect aluminum, magnesium, zinc alloy and other materials from high temperature oxidation. When the boron nitride coating is coated with refractory Diverse Pcb Ceramic Heat Sink Radiating Substrate Slice materials or ceramic utensils, even when the temperature is as high as 1273K, the boron nitride coating can effectively protect the anti-oxidation. Figure 6 shows a tool coated with boron nitride. The high thermal conductivity of BN has always been keen by scientific researchers, mainly using the high thermal conductivity of nano-h-BN and c-BN to prepare composite materials to accelerate heat dissipation and heat conduction effects. Figure 7 shows the thermal conduction mechanism of boron nitride nanosheet composites. At the same time, it can solve the problem of high resistivity materials needed to avoid short circuits when the thermal conductive material is in contact with the electrical components in operation. BN is more suitable as a thermal conductive material than carbon nanotubes. By blending ultrasonically stripped two-dimensional boron nitride nanosheets and one-dimensional cellulose nanofibers, the thermal conductivity of the prepared composite material is as high as 180W/(m·K), which is the nanocomposite material with the highest thermal conductivity so far. Effective removal of oil, organic solvents and dyes in water is a global water resource protection issue. It is urgent to develop advanced adsorbent materials with excellent adsorption capacity. Using boron trioxide and guanidine hydrochloride as raw materials, heating at 1100°C under N2/H2 mixed carrier gas for 2 hours. The specific surface area of the synthesized boron nitride nanosheets is as high as 1427m2/g. As shown in Figure 8, its ability to adsorb ethanol, toluene, oil and other pollutants in water significantly exceeds that of commonly used adsorption materials. What's more interesting is that the porous body Diverse Pcb Ceramic Heat Sink Radiating Substrate Slice material made of boron nitride nanosheets can simply burn in the air to remove the oil after absorbing oil. Its strong chemical inertness and oxidation resistance make it reusable after the oil is burned. Hydrogen is currently the cleanest energy source and has bright development prospects for solving the problem of air pollution. How to use and store hydrogen safely and effectively is the primary problem for researchers to solve. Using melamine and boric acid as precursors, porous BN nanobelts were prepared at 900-1100°C with a specific surface area of 1488m2/g, which is the largest in the boron nitride family reported, and its hydrogen storage performance is also excellent. Figure 9 shows the morphology of the boron nitride nanobelt and the hydrogen adsorption-desorption curve. As an advanced nanomaterial and ceramic material, boron nitride nanomaterials are favored by various Diverse Pcb Ceramic Heat Sink Radiating Substrate Slice fields due to their excellent physical and chemical properties. They will also play a more important role in the fields of optoelectronics, environmental protection and daily chemicals. We need to develop ideas on the basis of existing research and applications to achieve large-scale, economical, and zero-polluting synthesis of boron nitride nanomaterials, and promote wide-ranging applications.