La2O3、Y2O3掺杂对(Na0.5Bi0.5)0.94Ba0.06TiO3无铅压电陶瓷性能的影响

La₂O₃、Y₂O₃掺杂对(Na_0.5Bi_0.5)_0.94Ba_0.06TiO₃无铅压电陶瓷性能的影响

摘要: 以(Na_0.5Bi_0.5)_0.94Ba_0.06TiO₃为基体,研究了单、双组分掺杂La₂O₃、Y₂O₃对BNBT6陶瓷的压电和介电性能及微观结构的影响。XRD分析表明:掺杂La₂O₃、Y₂O₃均得到钙钛矿结构。SEM分析表明,分别掺杂0.2%La₂O₃和0.2%Y₂O₃使得陶瓷晶粒增大,压电常数提高,双组分掺杂La₂O₃、Y₂O₃在掺杂量0.12%La₂O₃+0.08%Y₂O₃时,压电常数d₃₃增大到最大值144.6×10^-12C/N,介质损耗降低到最小值0.039。

Abstract: Effect of doping La₂O₃ and Y₂O₃ on dielectric and piezoelectricity properties of(Na_0.5Bi_0.5)_0.94Ba_0.06TiO₃ lead-free ceramics was investigated.X-ray diffraction analysis shows that doped La₂O₃ and Y₂O₃ exhibit single-phase perovskite structure.SEM observation suggests that when 0.2%La₂O₃ and 0.2%Y₂O₃ is added,the crystal grain is accreted and piezoelectric constant is advanced.When 0.12%La₂O₃ and 0.08%Y₂O₃ is added,piezoelectric constants(d₃₃) reaches the maximum value of 144.6×10^-12C/N and dielectric loss reaches the minimum value of 0.039.