By TRUNNANO | 07 June 2024 | 0 Comments
Properties of Cubic Boron Nitride
Cubic boron nitride is nitrogen and boron atoms to take sp3 hybridization, the formation of the diamond-like structure of boron nitride, each atom and four dissimilar atoms to covalent bonds with each other, four bond lengths are equal.
Cubic boron nitride has a crystal structure similar to diamond; not only the lattice constant is similar, but the bond in the crystal is basically the same; the difference is that the bond in the diamond is a purely covalent bond between carbon atoms, and the bond in the cubic boron nitride crystals is boron - nitrogen atoms of the covalent bond between. 
Properties of Cubic Boron Nitride
Physical properties: pure cubic boron nitride is colourless and transparent due to the purity of raw materials, catalysts and the impact of the synthesis process; it can be black, brown, amber, orange and so on. The theoretical density of cubic boron nitride is 3.48g/cm3, and the actual density is 3.39~3.44g/cm3.
Mechanical properties: the Mohs hardness of cubic boron nitride is 9.7, the Vickers hardness is 68.6~88.2GPa, which is slightly lower than that of diamond; the compressive strength is 7.2GPa, and the flexural strength is 294MPa.
Chemical properties: the chemical composition of cubic boron nitride is 43.6 B and 56.4% of N. The main impurities are SiO2, B2O3, Al2O3, Fe, Mg, Ca, etc.; the thermal stability and chemical inertness of cubic boron nitride to iron group elements and their alloys are obviously better than that of diamond.
Although the hardness of cubic boron nitride is lower than that of diamond due to its chemical inertia and better thermal stability with ferrous metals containing iron, its metal removal rate reaches ten times of diamond, which is a good solution to the hard, hard-wearing metal materials such as hardened steel and other processing problems.
Synthesis of Cubic Boron Nitride
Similar to diamond, there are high-pressure and high-temperature synthesis methods (hydrostatic catalyst synthesis method) and atmospheric pressure and high-temperature synthesis methods for the synthesis of cubic boron nitride. The hydrostatic catalyst synthesis method is mainly used for the synthesis of CBN single crystals and polycrystals, and the atmospheric pressure and high-temperature method is mainly used for the synthesis of CBN films.
The raw materials of CBN synthesized by hydrostatic catalyst method are mainly hexagonal boron nitride and catalyst, and the synthesis equipment is the same as that of diamond, which is mainly a six-sided top press. BN raw materials with a low degree of crystallization, fine grain size and low impurity content should be selected to facilitate the growth of high-quality CBN.
Application of cubic boron nitride
Abrasive materials: Due to the excellent grinding performance of cubic boron nitride abrasives, it is not only capable of processing wear-resistant materials, improving productivity and facilitating the strict control of the shape and dimensional accuracy of the workpiece but also effective in improving the quality of grinding of the workpiece, and significantly improving the surface integrity of the workpiece after grinding.
Similar to diamond, cubic boron nitride abrasives can also be made into different grinding tools with resin bonds, metal bonds and ceramic bonds, respectively. At present, Cubic Boron Nitride abrasives have been widely used in the grinding of components in many fields, such as automobiles, bearings, machine tools, tools engineering ceramics and so on. 
High-Quality Boron Nitride Suppliers
TRUNNANO is a globally recognized manufacturer and supplier of compounds with over 12 years of expertise in the field of high-quality nanomaterials and other materials. The company has developed a wide range of chemicals. OEM service is available. If you need boron nitride, please feel free to contact us.
Cubic boron nitride has a crystal structure similar to diamond; not only the lattice constant is similar, but the bond in the crystal is basically the same; the difference is that the bond in the diamond is a purely covalent bond between carbon atoms, and the bond in the cubic boron nitride crystals is boron - nitrogen atoms of the covalent bond between.
Physical properties: pure cubic boron nitride is colourless and transparent due to the purity of raw materials, catalysts and the impact of the synthesis process; it can be black, brown, amber, orange and so on. The theoretical density of cubic boron nitride is 3.48g/cm3, and the actual density is 3.39~3.44g/cm3.
Mechanical properties: the Mohs hardness of cubic boron nitride is 9.7, the Vickers hardness is 68.6~88.2GPa, which is slightly lower than that of diamond; the compressive strength is 7.2GPa, and the flexural strength is 294MPa.
Chemical properties: the chemical composition of cubic boron nitride is 43.6 B and 56.4% of N. The main impurities are SiO2, B2O3, Al2O3, Fe, Mg, Ca, etc.; the thermal stability and chemical inertness of cubic boron nitride to iron group elements and their alloys are obviously better than that of diamond.
Although the hardness of cubic boron nitride is lower than that of diamond due to its chemical inertia and better thermal stability with ferrous metals containing iron, its metal removal rate reaches ten times of diamond, which is a good solution to the hard, hard-wearing metal materials such as hardened steel and other processing problems.
Synthesis of Cubic Boron Nitride
Similar to diamond, there are high-pressure and high-temperature synthesis methods (hydrostatic catalyst synthesis method) and atmospheric pressure and high-temperature synthesis methods for the synthesis of cubic boron nitride. The hydrostatic catalyst synthesis method is mainly used for the synthesis of CBN single crystals and polycrystals, and the atmospheric pressure and high-temperature method is mainly used for the synthesis of CBN films.
The raw materials of CBN synthesized by hydrostatic catalyst method are mainly hexagonal boron nitride and catalyst, and the synthesis equipment is the same as that of diamond, which is mainly a six-sided top press. BN raw materials with a low degree of crystallization, fine grain size and low impurity content should be selected to facilitate the growth of high-quality CBN.
Application of cubic boron nitride
Abrasive materials: Due to the excellent grinding performance of cubic boron nitride abrasives, it is not only capable of processing wear-resistant materials, improving productivity and facilitating the strict control of the shape and dimensional accuracy of the workpiece but also effective in improving the quality of grinding of the workpiece, and significantly improving the surface integrity of the workpiece after grinding.
Similar to diamond, cubic boron nitride abrasives can also be made into different grinding tools with resin bonds, metal bonds and ceramic bonds, respectively. At present, Cubic Boron Nitride abrasives have been widely used in the grinding of components in many fields, such as automobiles, bearings, machine tools, tools engineering ceramics and so on.
TRUNNANO is a globally recognized manufacturer and supplier of compounds with over 12 years of expertise in the field of high-quality nanomaterials and other materials. The company has developed a wide range of chemicals. OEM service is available. If you need boron nitride, please feel free to contact us.
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