【摘要】 采用金属铝为前驱物 ,在 45 0℃的氨热条件下 ,获得了高质量的氮化铝纳米粉体 .测量了合成粉末的X射线衍射谱、光致发光谱和高分辨透射电子显微像 (HRTEM) ,发现合成的粉末是平均粒度为 3 2nm的纤锌矿结构的氮化铝 ,此AlN中存在蓝光发光带 .另外 ,讨论了AlN在高压釜内的低温氨热合成机制 .更多还原

【Abstract】 High quality aluminum nitride powder was obtained through the reaction of aluminum metal with ammonia at 450 ℃ in autoclave. The synthesized powder was characterized by X -ray powder diffraction, high resolution transmission electron microscopy(HRTEM) and photoluminescence spectrum. X -ray diffraction and HRTEM indicate that the powder consist of wurtzite AlN with an average size of about 32 nm. Photoluminescence spectrum confirms the existence of a blue luminescence band in AlN due to nitrogen vacancies. A possible low_temperature_synthesis_mechanism is discussed.更多还原