Micro-grains of wurtzite boron nitride(wBN) crystal have been observed

Micro-grains of wurtzite boron nitride(wBN) crystal have been observed in 5.0-7.0 GPa pressure and 1800-2000 K temperature where cubic boron nitride has been synthesized in a catalyst. The wBN grain size is about 20-30 nm. The presence of these micro grains indicates that the pressure for wBN growth could be lower than that found in the previous work. The first, wurtzite boron nitride, is similar to diamond but comprises different atoms. The second, the mineral lonsdaleite, is made from carbon atoms, just like diamonds, but they are arranged in different shapes. So until now, no one has realized their superior strength. The simulation showed that wurtzite boron nitride would withstand 18 percent more stress than diamond and lonsdaleite 58 percent more. If the results is confirmed with physical experiments, both materials would be far more challenging than any measured substance. Doing those tests won’t be easy, though. Because both are rare, a way is needed to make enough of either to test the prediction. Rare mineral lonsdaleite is sometimes formed when graphite meteorites hit Earth, while wurtzite boron nitride is shaped during volcanic eruptions that produce very high temperatures and pressures. If confirmed, however, wurtzite boron nitride may be the most valuable of the two because it is more stable in oxygen at higher temperatures than diamond. This makes it ideal for placing on the tips of cutting or drilling tools operating at high temperatures, for example. Some bonds re-orientate themselves by 90 degrees when the material is stressed to relieve the tension. Although diamond undergoes a similar process, about structure of wurtzite boron nitride makes it nearly 80% stronger after the process occurs. If you are looking for high quality, high purity and cost-effective Wurtzite Boron Nitride, or if you require the latest price of Wurtzite Boron Nitride, please feel free to email contact mis-asia.

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