【摘要】 采用固相反应法制备了BaTi_1-xNi_xO₃（x=0、0.01、0.05、0.08、0.1、0.2）陶瓷,研究了不同Ni掺杂量对BaTi_1-xNi_xO₃陶瓷的相结构和介电性能的影响。采用X射线衍射技术（XRD）分析了BaTi_1-xNi_xO₃陶瓷的相结构;采用阻抗分析仪测试BaTi_1-xNi_xO₃陶瓷介电性能。XRD分析结果表明:随着Ni的掺杂量的增加,BaTi_1-xNi_xO₃陶瓷的晶相由四方相逐渐转变为六方相,当Ni的掺杂量为x=0.1时,BaTi_1-xNi_xO₃完全变为六方相。随着Ni含量的增大,所有六方相的BaTi_1-xNi_xO₃的晶格常数都变大,且相对介电常数ε_r整体降低而介电损耗tanδ呈现先减小后增大的趋势。更多还原

【Abstract】 In this work,BaTi_（1-x）Ni_xO₃（x=0,0.01,0.05,0.08,0.1,0.2） ceramics were prepared by the solid state reaction method, and the dependence of the phase structures and dielectric properties of the BaTi_（1-x）Ni_xO₃ ceramics on the concentration of Ni dopant was investigated.The phase structures and dielectric properties of the BaTi_（1-x）Ni_xO₃ ceramics were characterized with the X-ray diffraction（XRD） technique and impedance analyzer,respectively.It was found that the Ni doping promoted the transformation of the phase structure of the BaTi_（1-x）Ni_xO₃ ceramics from the tetragonal to hexagonal.When the doping concentration of Ni was at x = 0.1,the BaTi_（1-x）Ni_xO₃ ceramics exhibited purely hexagonal phase.With the increase of Ni doping,the lattice constant of the hexagonal BaTi_（1-x）Ni_xO₃ became larger.The whole of the relative dielectric constant decreased but the tangent loss of the BaTi_（1-x）Ni_xO₃ ceramics decreased first and then increased with the increase of Ni doping.更多还原