Abstract BaCO₃ nanopowder was prepared using liquid phase precipitation method by fast and vigorous mechanic mixing . TEM and XRD showed that the average diameter of the powder is about 55 nm×f30 nm and the powder is unique BaCO₃ nanopowder with square system. In order to get fairly perfect BaCO₃ nanopowder, some measures were adopted during the preparing process: the acidic-basic solutions were mixed rapidly and the final pH value of the precursor was controlled over10, cleaning solution (NH₄OH、NH₄HCO₃) was used to wash the precipitation.
Key words BaCO₃, Nanopowder, Liquid phase precipitation, Rapid and vigorous mechanic mixing

温传庚 王开明 周英彦^* 李晓奇 郇维亮 赵 颖 陈智慧 朱未琴
(鞍山科技大学 纳米材料研究中心 辽宁鞍山 114044)

摘要 采用快速高强度机械混合液相沉淀法制备了碳酸钡纳米粉体。经TEM和XRD表征，平均粒子大小为55 nm×f30 nm左右，为正方晶系的单一碳酸钡纳米粉。在制备过程中，采用快速混合酸-碱溶液，并控制溶液最终pH≥10，然后用NH₄OH、NH₄HCO₃清洗液过滤、洗涤。得到较为理想的纳米碳酸钡粉体。
关键词 碳酸钡 纳米粉体 液相沉淀 快速高强度机械混合

温传庚 男，56岁，副教授。*联系人 E-mail:yyzhou@0412.net
国家自然基金资助项目(50272002)
2003-02-24收稿

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