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Boron nitride nanotubes， nanocapsules and nanocages were fabricated by arc-melting LaB6 and boronLaB6 powder compacts in a nitrogenargon gas atmosphere， which were determined by high-resolution electron microscopy and energy dispersive X... Boron nitride nanotubes， nanocapsules and nanocages were fabricated by arc-melting LaB6 and boronLaB6 powder compacts in a nitrogenargon gas atmosphere， which were determined by high-resolution electron microscopy and energy dispersive X-ray spectroscopy. The diameters of the boron nitride nanotubes， nanocapsules and nanocages were in the range of 10
100 nm， 10
30 nm and 80 nm， respectively. The present work indicates that La could be a good candidate as a catalyst to produce the boron nitride fullerene materials by changing the ratio of LaB6B.
2001 Elsevier Science B.V. All rights reserved.