Hexagonal boron nitride is also called "white graphite", but as an electrical edge body, it has higher oxidation resistance than graphite. In the electronics industry, extending product life, improving and reducing heat loss... In recent years, the application research of boron nitride edge materials has achieved some encouraging achievements. Boron Nitride

"White graphite", hexagonal boron nitride (hBN)

Boron Nitride Composite

In addition to edge properties, the advantages of boron nitride include high strength, light weight, and corrosion resistance. But its chemical properties are so stable and the surface lacks molecular binding sites, which affects its use in combination with other materials.

One, the introduction of positive charges when processing boron nitride can use repulsion to help layer the boron nitride and form bonding sites between the layers. This allows boron nitride materials to create new interfaces with nanoparticles, molecules, and other two-dimensional materials. VikasBerry, the lead author of the research paper, explained, “The positive charge on the surface of the separated boron nitride sheet can make it more chemically active. Protonation—that is, the increase of positive charge on the nitrogen atom, supports the combination of boron nitride and other materials. "Related research on boron nitride composite materials has also broadened the application range of boron nitride edge bodies.

Impurity removal and purification

Boron nitride nanotubes (BNNTs) are not edged, and the thermal conductivity is even 10 that of copper. However, traditional preparation methods are difficult to achieve high purity, and product purity often ranges from 30% to 70%, which also makes BNNTs unsuitable for demanding industries.

Fortunately, there is a new method that can remove more than 99% of impurities to purify boron nitride nanotubes. According to related studies, heptane needs to be used in the purification process, which is performed below the boiling temperature of water. This greatly reduces the temperature of the previous purification conditions and will not damage the structure of BNNT.

Structural design of boron nitride material

The application of boron nitride as an edge material is relatively not so mature and perfect, and various problems will inevitably occur, and there are some limitations, but as long as it is solved by methods, it will bring infinite surprises. For example, when a boron nitride film is used for heat dissipation, it is found that the thermal conductivity in different directions is very different. It hardly transfers heat in the direction perpendicular to the film, but only spreads heat horizontally along the film. Scientists convert hexagonal boron nitride powder into solid particles based on spark plasma sintering technology (SPS), so that it has the same thermal and heat dissipation capabilities in three dimensions, and still maintains electrical edge performance.

Sexual Discovery of Amorphous Boron Nitride Materials

In addition to thermal stability, dielectric properties, chemical stability and mechanical stability, edge materials also require shielding of metal migration. These requirements are met by the amorphous boron nitride film. The researchers prepared a 3-nanometer-thick boron nitride thin film material on a silicon substrate. At 100 kHz, the dielectric constant is a record 1.78. This is regarded as a proof that boron nitride can become a proof of previous industry experience.

Summary

As scientists verified the electrical properties of boron nitride, many people realized that it has other characteristics suitable for the needs of high-tech electronic products. The transition from the laboratory is usually not a simple process, but the boron nitride gives scientists and engineers reasons to work hard to achieve this goal.