A new lead-free ferroelectric solid solution between (Ba,Ca)(Zr,Ti)O₃ (BCZT) and K_0.5Bi_0.5TiO₃ (KBT) has been systematically investigated in terms of its phase transformations, microstructure, dielectric and ferroelectric properties. The incorporation of KBT into BCZT was found to enhance the sintering behavior, although secondary phases of K₄Ti₃O₈ and BaBi₄Ti₄O₁₅ were detected at high KBT contents. Chemical heterogeneity was also observed in the form of core-shell grain structures comprising tetragonal ferroelectric BCZT-rich cores with pseudo-cubic relaxor ferroelectric KBT-rich shell regions. Temperature-dependent dielectric property measurements revealed that the BCZT-KBT ceramics exhibited both normal and relaxor ferroelectric behaviour simultaneously, associated directly with the core-shell structure. Ferroelectric hysteresis measurements indicated that the remanent polarisation and coercive field were strongly dependent on KBT content. In common with other lead-free relaxor ferroelectrics, increasing temperature led to the formation of constricted polarisation-electric field hysteresis loops, indicating the occurrence of a reversible electric field-induced nanopolar to long-range ordered ferroelectric state.

从相变，微结构，介电和铁电性方面研究了一种新的无铅铁电固溶体，该固溶体介于（Ba，Ca）（Zr，Ti）O ₃（BCZT）和K _0.5 Bi _0.5 TiO ₃（KBT）之间。特性。尽管将K ₄ Ti ₃ O ₈和BaBi ₄ Ti ₄ O _15的第二相添加到BCZT中，但KBT的掺入可以提高烧结性能。在高KBT含量下被检测到。还观察到化学异质性，其形式为核壳结构，包括富四方铁电BCZT的核和伪立方弛豫铁电KBT的壳区域。与温度有关的介电性能测量表明，BCZT-KBT陶瓷同时表现出正常的铁电性能和弛豫铁电性能，直接与核-壳结构有关。铁电磁滞测量结果表明，剩余极化和矫顽场强烈依赖于KBT含量。与其他无铅弛豫铁电体一样，温度升高导致形成极化的极化电场磁滞回线，