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改性的沉淀法制备三氧化二钇粉体

Nano-sized Y₂O₃ powder preparaed by modified precipitation method

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【Author】 TONG Shi-hong~1,LU Tie-cheng~(1,2),GUO Wang~1,ZHANG Ying~1,CHEN Feng-bo~1 (1.Department of Physics and Key Laboratory of Radiation Physics and Technology for Ministry of Education,Sichuan Universiy,Chengdu 610064,China;2.International Center for Material Physics,Chinese Academy of Sciences,Shenyang 110015,China)

【机构】四川大学物理系和辐射物理及技术教育部重点实验室；四川大学物理系和辐射物理及技术教育部重点实验室四川成都610064；四川成都610064；中科院国际材料物理中心；辽宁沈阳110015；

【摘要】以Y(NO3)3和NH4HCO3为原料,添加适量的表面活性剂(聚乙烯醇)和(NH4)2SO4,利用改性的沉淀法制备了Y2O3前驱体。对前驱体在不同温度下进行焙烧,成功制备了超细Y2O3纳米粉体。分别采用XRD、TEM和TG-DTA分析了不同温度下煅烧所得粉体的物相、形貌以及前驱体热分解特性。结果表明,前驱体在900℃下保温1.5 h,得到的Y2O3粉体颗粒近球形,细小均匀,平均尺寸约为7nm,粒径分布极窄,并具有很好的分散性和流动性。更多还原

【Abstract】 Y₂O₃ precursor was synthesized via a modified precipitation method with Y（NO₃）₃ and NH₄HCO₃ as the raw material,and a proper amount of surfactant（polyvinyl alcohol） and（NH₄）₂SO₄.Then nano-sized Y₂O₃ powder was produced through calcining precursor at different temperatures.The calcined powder was measured by means of XRD,TEM and TG-DTA.The results are shown that,the Y₂O₃ particle calcined at 900℃ for 1.5h possesses sphere-like shape,uniform size（7nm）,excellent dispersity and flowability.更多还原