摘要
由均匀沉淀法制备出氢氧化镁沉淀,再分别采用直接烘箱干燥、溶剂置换烘箱干燥、共沸蒸馏干燥、溶剂置换微波干燥以及溶剂置换超临界二氧化碳干燥除去沉淀中的水分。干燥后的氢氧化镁经高温煅烧得到纳米氧化镁粉体,通过透射电子显微镜和X射线衍射仪的检测,研究了不同干燥方式对纳米氧化镁粉体形貌和尺寸的影响。
Magnesium hydroxide precipitate was prepared using the homogenous precipitation method. Before the precipitate was calcined to produce nanoscale magnesium oxide, it was dried to remove the solvent by the following methods: direct oven drying, azeotropic distillation drying, solvent-replacement microwave drying, solvent-replacement oven drying and solvent-replacement supercritical C02 drying. All samples from above treatments were characterized by X-ray diffraction and transmission electron microscope to investigate the effects of drying methods on the morphology and particle size of nanoscale magnesia.
