Structural, dielectric and magnetic properties of dense Dy-substituted strontium titanate ceramics are investigated. In the Sr_1-1.5xDy_xTiO₃ system, incorporation of Dy onto the Sr site is confirmed by a linear decrease of the lattice parameter up to x = 0.05. Dielectric spectroscopy analysis of Sr_1-1.5xDy_xTiO₃ ceramics reveals four relaxations. Two relaxations observed below 55 K are attributed to dipoles formed by off-centre displacement of Dy³⁺ ions on the Sr sites. Other two dielectric relaxations found at higher temperatures are attributed to the oxygen vacancy related mechanisms. As result, very high dielectric permittivity of ∼33500 at 28 K and of ∼9600 around room temperature at moderate dissipation factor of ∼0.02 are obtained for Sr_0.985Dy_0.01TiO₃ ceramics, making it a promising material for capacitor electronic applications. Paramagnetic behaviour observed for Sr_1-1.5xDy_xTiO₃ as well as for Sr_1-xDy_2xTi_1-xO₃ ceramics indicates impossibility to induce a magnetic order and hence magnetoelectric coupling in strontium titanate by Dy substitution.

研究了致密的Dy-取代钛酸锶锶陶瓷的结构，介电和磁性能。在Sr _{1-1.5 x} Dy _x TiO ₃系统中，通过将晶格参数线性降低至x  = 0.05 ，可以确定将Dy掺入Sr位点。Sr _{1-1.5 x} Dy _x TiO ₃陶瓷的介电谱分析显示出四张弛豫。在55 K以下观察到的两个弛豫归因于Dy ³⁺的偏心位移形成的偶极子离子在Sr位点上。在较高温度下发现的其他两种介电弛豫归因于与氧空位有关的机理。结果，对于Sr _0.985 Dy _0.01 TiO ₃陶瓷，获得了很高的介电常数，在28 K时约为33500，在室温下约为9600，在中等损耗因子约为0.02的情况下，使其成为电容器电子应用的有前途的材料。观察到Sr _{1-1.5 x} Dy _x TiO ₃以及Sr _{1- x} Dy _{2 x} Ti _{1- x} O _3的顺磁行为 陶瓷表明不可能通过Dy取代在钛酸锶中诱导磁序，从而磁电耦合。