CBN more attractive potential applications from its semiconductor properties

CBN (Cubic boron nitride, cBN) having excellent physical and chemical properties of superhard materials and wide band gap semiconductor materials. Its hardness and thermal conductivity second only to diamond, high temperature anti-oxidation ability, but also for iron group metals have good chemical inertness, so cBN is an excellent tool, abrasive materials, high temperature and pressure cBN crystal particles produced by the method already in the machining industry has been an important  Abrasive grinding wheel . CBN more attractive potential applications from its semiconductor properties. It has the widest band gap (Eg = 6.3 ± 0.2eV), may be p-type and n-type doping, and mechanical properties similar to diamond, for the manufacture of these high temperatures, high power, radiation, and for harsh environments work of power electronic devices and short-wavelength light emitting and detecting  Polycrystalline diamond , CBN therefore particularly noticeable. Method can only be prepared by the high temperature and pressure the size small cBN grains, while in the production tool coating and electrical, thermal, optical devices, etc., need to use a large area of ​​cBN, high pressure is also difficult to meet these needs. With the rapid development of science and technology films, people are prepared for low-cost large-area cBN film generated great interest, have launched studies to maximize cBN excellent performance.