Fully densified Ba_0.6Sr_0.34Ce_0.04TiO₃ ceramics with small grain microstructure (0.3−0.8 μm) and high insulation (∼10¹⁴Ω cm) could be successfully obtained by hot-pressed sintering (HPS) coupled with subsequent thermal annealing in oxygen atmosphere. The effects of annealing on the microstructure, dielectric, electric and energy storage properties were investigated with scanning electron microscope, X-ray photoelectron spectroscope, impedance and ferroelectric analyzers. The preferential oxidation of grain boundaries to gains resulted in the formation of electrically inhomogeneous microstructure, which could be much improved by increasing O₂ pressure during annealing process. The reduction of Ti⁴⁺ in the as-sintered HPS sample could be decreased with increasing the annealing temperature up to 1200 °C in flowing O₂ gas, leading to the decrease in dielectric relaxation and corresponding permittivity/loss above room temperature. Maximum energy density of 1.75 J/cm³ could be obtained under the field of 235 kV/cm with the efficiency of 85 %.

完全致密化的Ba _0.6锶_0.34铈_0.04的TiO _3个陶瓷具有小晶粒显微组织（0.3-0.8微米），高绝缘（〜10 ¹⁴ Ω厘米）可以通过以下方式成功地获得热压烧结（HPS）加上后续氧气热退火大气层。用扫描电子显微镜，X射线光电子能谱仪，阻抗和铁电分析仪研究了退火对显微组织，介电，电和能量存储性能的影响。晶界优先氧化而获得的晶粒导致形成电不均匀的微观结构，通过增加O ₂可以大大改善退火过程中的最大压力。在流动的O ₂气体中，随着退火温度升高至1200°C，可以减少烧结HPS样品中Ti ⁴⁺的减少，从而导致介电弛豫和相应的介电常数/损耗高于室温而降低。在235 kV / cm的磁场下，可以达到1.75 J / cm ^3的最大能量密度，效率为85％。