There is a general observation that the Curie temperature and piezoelectric property of the ferroelectric ceramics can be enhanced only at the expense of each other, i.e., higher piezoelectricity, lower Curie temperature, thus, limits their applications over broad temperature range. In this research, Sm-modified 0.15 Pb(Mg_1/3Nb_2/3)O₃-(0.85-x)PbZrO₃-xPbTiO₃ ceramics have been studied, where excellent piezoelectric coefficients d₃₃ = 720 pC/N, d₃₃∗ = 950 pm/V and high Curie temperature T_C = 293 °C were simultaneously achieved for x = 0.42 composition by designing the morphotropic phase boundary (MPB) with local structural heterogeneity. Of particular significance is that a high thermal stability was observed with piezoelectric variation below 20% with temperature up to 280 °C, demonstrating that the x = 0.42 composition is a good candidate for piezoelectric application over broad temperature range where high temperature stability is required. This work provides a good paradigm for designing high-performance piezoelectric ceramics with high thermal stability via a combination of MPB and local structural heterogeneity.

普遍观察到，铁电陶瓷的居里温度和压电性能只能以彼此为代价才能提高，即更高的压电性，更低的居里温度，因此限制了它们在宽温度范围内的应用。在这项研究中，研究了Sm改性的0.15 Pb（Mg _1/3 Nb _2/3）O _3-（0.85- x）PbZrO ₃ - x PbTiO ₃陶瓷，其中出色的压电系数d ₃₃  = 720 pC / N，d ₃₃ * = 950点/ V和高的居里温度Ť _ç  = 293℃下同时为实现X 通过设计具有局部结构异质性的同相相界（MPB），可得出= 0.42的成分。尤其重要的是，在高达280°C的温度下，压电变化低于20％时，观察到了很高的热稳定性，这表明x  = 0.42的成分非常适合要求高温稳定性的宽温度范围内的压电应用。这项工作为通过结合MPB和局部结构异质性来设计具有高热稳定性的高性能压电陶瓷提供了一个很好的范例。