窒素流体による窒化反応合成 : レーザー加熱DACによる試み

概要

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Nitridation of III-group elements is performed by high-pressure nitrogen fluid in a laser-heated diamond anvil cell to synthesize III-nitrides up to 15 GPa. In this article, we approach the nitridation process of elements through a close-up on the recovered products by high resolution scanning electron microscopy, Raman microscopy and micro-focused X-ray diffractometry. Gallium nitride (GaN) and aluminum nitride (AlN) are recrystallized as wruzite type structure followed by dissolution of gallium and aluminum into oversaturated nitrogen fluid. On the other hand, boron can be changed to cubic boron nitride (BN) without an extensive dissolution into nitrogen fluid. It would be considered that the difference of crystal habits is derived from the degree of dissolubility which would be partly related to the melting point of elements.
日本高圧力学会の論文
2004-08-20