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Boron nitride (along with Si 3 N 4, NbN, and BNC) is generally considered to be non-toxic and does not exhibit chemical activity in biological systems. [107] Due to its excellent safety profile and lubricious properties, boron nitride finds widespread use in various applications, including cosmetics and food processing equipment. [108] [109]
Boron nitride sheets can be also exfoliated by ball milling, where shear forces are applied on the face of bulk boron nitride by rolling balls. [9] This technique yields large quantities of low-quality material with poor control over its properties.
Two dimensional hexagonal boron nitride (2D h-BN) is a material of comparable structure to graphene with potential applications in e.g. photonics., [1] fuel cells [2] and as a substrate for two-dimensional heterostructures. [3] 2D h-BN is isostructural to graphene, but where graphene is conductive, 2D h-BN is a wide-gap insulator. [3]
Cubic boron nitride adopts a sphalerite crystal structure, which can be constructed by replacing every two carbon atoms in diamond with one boron atom and one nitrogen atom. The short B-N (1.57 Å) bond is close to the diamond C-C bond length (1.54 Å), that results in strong covalent bonding between atoms in the same fashion as in diamond.
Hexagonal boron nitride, which adopts a layered structure, is a useful high-temperature lubricant akin to molybdenum disulfide. Nitride compounds often have large band gaps, thus nitrides are usually insulators or wide-bandgap semiconductors; examples include boron nitride and silicon nitride. The wide-band gap material gallium nitride is ...
Like BN fibers, boron nitride nanotubes show promise for aerospace applications where integration of boron and in particular the light isotope of boron (10 B) into structural materials improves both their strength and their radiation-shielding properties; the improvement is due to strong neutron absorption by 10 B.
Its color ranges from black to brown and gold, depending on the chemical bond. It is one of the hardest known materials, along with various forms of diamond and other kinds of boron nitride. Borazon is a crystal created by heating equal quantities of boron and nitrogen at temperatures greater than 1800 °C (3300 °F) at 7 GPa (1 million lbf/in 2).
Graphene boron nitride nanohybrid materials may be useful for further development in nanoelectronics [12] and 3D thermal and mechanical properties. [13] Theoretical and experimental studies have demonstrated straining of graphene can result in high flexibility and can tune the electronic structure of graphene to produce enormous pseudomagnetic ...