BFO含量对Bi(Mg_(1/2)Ti_(1/2))O_3-PbTiO_3-xBiFeO_3陶瓷结构和性能的影响

BFO content-influence on the structure and properties of the Bi(Mg_(1/2)Ti_(1/2))O_3-PbTiO_3-xBiFeO_3 ceramics

采用传统的电子陶瓷的制备方法,以铁酸铋(BFO)为掺杂原料,在不同掺杂量制备了Bi(Mg1/2Ti1/2)O3-PbTiO3-xBiFeO3陶瓷.使用X射线衍射仪、介电温谱测试系统、环境扫描电镜、准静态d33测量仪对样品进行表征,结果表明:准同型相界附近的陶瓷试样中,随着烧结温度升高,密度降低,并且在1 075℃烧结温度下,不同BFO含量的样品均形成单一的钙钛矿(ABO3)型固溶体结构.BFO的掺杂能够有效降低粉末的平均颗粒尺寸,普通球磨的粉体添加x=0.015mol BFO在1 075℃烧结的样品表现出较为优秀的铁电性能.

Ceramic with the chemical compositions of Bi （Mg1/2 Ti1/2 ）O3-PbTiO3-xBiFeO3 （BMT-PT-xBFO）piezoelectric ceramic were prepared by conventional solid-state reaction method.The samples were tested and characterized by X-ray diffraction （XRD ）,dielectric temperature spectrum test system, environment scanning electron microscopy （SEM）,quasi-static d33 meter.The results show that the density of samples decrease with sintering temperature.When sintering temperature is 1 075 ℃,different amount of BFO samples form a single perovskite structure （ABO3 ）solid solution.BiFeO3 doping can effectively reduce the average particle size of powder.It can be found that the BMT-PT ceramics obtained with 0.015 mol BiFeO3 addition and sintered at 1 075 ℃ show excellent performance relatively.