| 摘 要： | Cubic boron nitride(c-BN) crystals with dimensions of 0.3-0.4mm,which have been synthesized using lithium nitride(Li3N) as a catalyst with a high-temperature method,were examined by transmission electron microscopy(TEM).The TEM result shows that there are some nanostructured areas containing several types of nanosized foreign particles within the as -grown c-BN crystals.We find that the nanometre inclusions are hexagonal BN with the lattice constants of α=2.05A and c=6.66A,tetragonal B25N with α=8.79A and c=5.08A,tetragonal B53N with α=8.79A and c=5.08A,and hexagonal Li3N with α=3.648A and c=3.875A.
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