【摘要】 研究了燃烧合成技术制备纳米粉Al2 O3 ·铝的硝酸盐和有机物为前驱体 ,一次反应即合成α Al2 O3 产物·实验考查了合成条件 ,最佳反应温度为 65 0～ 75 0℃·采用XRD和红外光谱分析了纳米粉的结构 ,电子透射电镜研究了Al2 O3 粉的粒度与形貌 ,研究结果表明 ,Al2 O3 粉体为α型 ,粒度在 60～ 80nm之间 ,球状·更多还原

【Abstract】 Using Aluminum Nitrate as starting materials, α Al 2O 3 nanoparticles were successfully prepared by combustion synthesis method in addition of combustion assistant agent. Optimal experimental conditions were examined, such as temperature, time and recovery rate. The structure of nanoparticles was analyzed by means of infrared spectroscope, XRD, and TEM. It is shown that nano α Al 2O 3 can not be formed if the temperature was less than 350?℃. The nano Al 2O 3 production recovery ratio is 80%～85% if reaction temperature is controlled at 650?℃～750?℃. The diameter of the spherical particles observed by TEM is 60?nm to 80?nm. Most of nano Al 2O 3 particles are spherical and similar spherical and primary examination indicates them with perfect crystal structure. The optimal temperature for the synthesis is identified being at 650～750?℃.更多还原