作　　者： ; ; ; ;

机构地区： 华东师范大学

出　　处： 《无机材料学报》 2010年第5期541-545,共5页

摘　　要： 采用一种新型螺杆研磨机,以氧化物为原料,仅需3h的研磨,即可得到钙钛矿相结构的纳米铌镁酸铅(PMN)粉体.并研究了原料粉质量、研磨功率、研磨时间等不同因素对于合成的影响.通过对比分析发现,提高研磨功率,可以缩短合成时间、提高产物纯度、减小粉体粒径.通过原料交叉反应实验,确定剪切力机械化学法合成铌镁酸铅的反应机理为:MgO与Nb2O5反应生成MgNb2O6,然后与PbO反应获得铌镁酸铅. Nanoscale lead magnesium niobate（PMN） powders of perovskite phase were synthesized by the screw grinder for 3h starting from raw materials of oxides.The influences of reaction conditions on products,such as weight of raw materials,grind power and grind time,were studied in detail.The results show that high grind power can reduce the synthesis time,improve the purity of products and decrease the particle size.The mechanochemical mechanism of PMN synthesis is confirmed via cross reaction experiments between raw materials.Magnesium niobate is firstly formed through mechanochemical reaction between MgO and Nb2O5,then reacted with PbO to get the PMN finally.

关 键 词： 机械化学法 铌镁酸铅 反应机理

领　　域： [化学工程] [化学工程]