摘要：以葡萄糖和硝酸铝为原料,采用水热法合成大小及壁厚可控的α-氧化铝空心微球。通过扫描电子显微镜(SEM)、傅立叶红外光谱分析仪(FT-IR)、X射线衍射(XRD)、热分析(TG-DSC)等手段对合成产品进行表征。结果表明:得到的氧化铝空心微球分散性较好,可通过调节加入的葡萄糖浓度及硝酸铝量,得到大小及壁厚不同的氧化铝空心球,烧结温度对微球粒径大小影响不大,当烧结温度上升900℃时,壳层结构由不定形态变为γ-Al₂O₃,当烧结温度上升到1 100℃时,可得到α-Al₂O₃氧化铝空心微球。

关键词： 水热合成；α-氧化铝；空心微球

Abstract：The size and shell thickness-tunbale hollow α-alumina microspheres were prepared by hydrothermal method and using glucose and aluminum nitrate as raw materials. The prepared samples were characterized by scanning electron microscop y（SEM）， fourier transform infrared spectroscopy （FT -IR）， X-ray diffraction （XRD） and thermal analysis （TG-DSC）. According to the experiment， the as-prepared alumina hollow spheres were highly mono-dispersion. The size of alumina hollow spheres and shell thcikness could be changed by adjusting the glucose concentration and the amount of alumium nitrate. The temperature had little effect on the size of the hollow spheres. The shell structure changed from amorphous to γ-Al₂O₃ when the sintering temperature at 900 ℃. The α-Al₂O₃hollow spheres were obtained when the sintering temperature was 1 100 ℃. 

Keywords： hydrothermal method； α-alumina； hollow micro-spheres