ABSTRACT

Using composition designing, Pb(In_1/2Nb_1/2)O₃-Pb(Mg_1/3Nb_2/3)O₃-PbTiO₃ (PIN-PMN-PT) ceramics with compositions around the morphotropic phase boundary (MPB) were prepared by the solid-state reaction method via the columbite and wolframite precursor techniques. X-ray diffraction (XRD) measurement and XRD peaks fitting combined with electrical performance characterization confirm the occurrence of composition-induced ferroelectric phase change, and the sintered PIN-PMN-PT ceramics present the coexistence of rhombohedral and tetragonal ferroelectric phases. Composition exerts great influence on the relative density of the sintered ceramics, and the 0.28Pb(In_1/2Nb_1/2)O₃-0.40Pb(Mg_1/3Nb_2/3)O₃-0.32PbTiO₃ (0.28PIN-0.40PMN-0.32PT) ceramics exhibit rather uniform microstructural morphology with high relative density of 94.4%. Dielectric, ferroelectric, and piezoelectric performance characterization also confirm the existence of the MPB effects, where the composition having performance maximum presents slight difference, proving that MPB has the composition region. Dielectric response behavior fitting and Raman spectroscopy measurement confirm the PIN-PMN-PT ceramics approach normal ferroelectrics with apparent diffusive transition characteristic and the occurrence of composition-induced ferroelectric phase change.

摘要

使用成分设计，Pb(In _1/2 Nb _1/2 )O ₃ -Pb(Mg _1/3 Nb _2/3 )O ₃ -PbTiO ₃ (PIN-PMN-PT) 陶瓷在同形相界附近具有成分（ MPB) 是通过固态反应法通过铌铁矿和黑钨矿前体技术制备的。X 射线衍射 (XRD) 测量和 XRD 峰拟合结合电性能表征证实了成分诱导铁电相变的发生，并且烧结的 PIN-PMN-PT 陶瓷呈现菱形和四方铁电相的共存。成分对烧结陶瓷的相对密度影响很大，0.28Pb(In_1/2 Nb _1/2 )O ₃ -0.40Pb(Mg _1/3 Nb _2/3 )O ₃ -0.32PbTiO ₃ (0.28PIN-0.40PMN-0.32PT)陶瓷表现出相当均匀的微观结构形态，具有较高的相对密度94.4%。介电、铁电和压电性能表征也证实了 MPB 效应的存在，其中性能最大的成分略有不同，证明 MPB 具有成分区域。介电响应行为拟合和拉曼光谱测量证实 PIN-PMN-PT 陶瓷接近普通铁电体，具有明显的扩散转变特性和成分诱导铁电相变的发生。