【摘要】 Nd等价取代Bi₄Ti₃O₁₂-SrBi₄Ti₄O₁₅的A位,形成SrBi_8-xNd_xTi₇O₂₇（x=0.00～1.50）共生陶瓷.结果表明:Nd掺杂未改变晶体的共生结构,样品剩余极化（2P_r）在掺杂量x=0.50时取得极大值,为32.3×10^-2 C·m^-2,比未掺杂时增加了70%,而矫顽场则从未掺杂时的90.5×10⁵ V·m^-1上升为103×10⁵ V·m^-1.Nd掺杂使得样品的居里温度（t_C）有所下降,x=0.50时的t_C为538℃.掺杂使得样品的压电性能明显改善,压电系数d₃₃从未掺杂时的6 pC·N^-1增加到x=0.50时的11 pC·N^-1.更多还原

【Abstract】 Ferroelectric,dielectric and piezoelectric properties of Nd-doped Bi₄Ti₃O₁₂-SrBi₄Ti₄O₁₅ inter- growth ceramics are investigated.It is found that a single phase of randomly-oriented bismuth layer- structured is obtained with Nd content.The remanent polarization is increased from nondoped 19.1×10^-2 C·m^-2 up to 32.3×10^-2 C·m^-2 at x=0.50 and the coercive field is increased a little bit.The temperature dependence of dielectric permittivity （ε） for Nd-doped Bi₄Ti₃O₁₂-SrBi₄Ti₄O₁₅ shows the Curie temperature （t_C） decreases with increasing Nd content and t_C=538 （?） at x=0.50.Piezoelectric coefficient d₃₃ is increased from nondoped 6 pC·N^-1 to 11 pC·N^-1 at x=0.50.更多还原