以正钛酸四正丁酯(C16 H 36 O 4 Ti)、Ba(OH)2·8H 2 O、NbCl5和NaOH试剂为原料,利用微波水热法,制备了不同含量Nb掺杂的纳米BaTi1-x Nbx O 3(x=0,0.01,0.02,0.03,0.04,0.05,0.06)粉体.然后,将纳米BaTi1-x Nbx O 3粉体压制成形并进行烧结处理,获得了不同含量Nb掺杂的BaTi1-x Nbx O 3压电陶瓷.采用X射线衍射(XRD)、拉曼光谱、扫描电子显微镜(SEM)等对纳米BaTi1-x Nbx O 3粉体的物相结构、表面形貌和晶粒尺寸进行分析,采用振动磁强计对BaTi1-x Nbx O 3压电陶瓷的烧结密度和磁性能进行分析.XRD和拉曼光谱分析表明,不同含量Nb掺杂的纳米BaTi1-x Nbx O 3(x=0,0.03,0.06)粉体具有四方特性;SEM形貌分析表明,纳米BaTi1-x Nbx O 3(x=0,0.03,0.06)粉体由粒径极细、分散性良好的球形颗粒组成,随着Nb含量的增加,粉体的颗粒尺寸也不断增加,其平均粒径分别约为60,90和120 nm;烧结密度研究表明,随着Nb含量的增加,BaTi1-x Nbx O 3压电陶瓷的烧结密度不断增大,当Nb含量为0.06时,BaTi1-x Nbx O 3压电陶瓷的烧结密度达到最大;磁性能分析表明,当Nb掺杂量为0.03时,BaTi1-x Nbx O 3压电陶瓷的剩余磁化强度最大(8.235μC/cm2),且其矫顽力(5.762 kV/cm)与不掺杂Nb的BaTiO 3陶瓷(5.556 kV/cm)相差不大.因此,Nb掺杂量为0.03时,BaTi1-x Nbx O 3压电陶瓷的压电性能最优.
微波水热法 Nb掺杂 烧结密度 磁化强度 矫顽力