【摘要】 本文利用高分子表面保护的化学沉淀方法成功地制备了粒径分布均匀的类球型纳米 ＭｇＯ。并对所制得的纳米粒子采用红外光谱（ＩＲ）、透射电镜（ＴＩＭ）、差热及热重分析（ＴＧ－ＤＴＡ）和Ｘ射线衍射（ＸＲＤ）等现代分析测试手段进行了表面形貌、结构、晶形和组成等的表征。结果表明利用高分子的表面保护作用能够控制纳米微粒的形状和大小；由于聚乙烯醇分子中多羟基与金属离子间强的相互作用，因此获得的纳米微粒粒径更小，分散性更好。更多还原

【Abstract】 The MgO nanoparticles with narrow size distribution has been successfully prepared using chemical precipitation, in which the polymer is surface protection agent of particle. The structure, crystal type and surface state were characterized by means of physical techniques, including IR, TEM, TG-DTA and XRD measurement. The IR data revealed that intensive interaction exist between PVA and precursor, and the microstructure measured by TEM and XRD is spherical-like shape and cubic MgO. The average size is only 15urn in polyvinyl alcohol (PVA) comparing with 23urn in polyethylene glycol (PEG), The different size may be related to the molecular structure of polymer. The results showed that the shapes and sizes of nanoparticles could be controlled and modified by polymer.更多还原