Piezoelectric Ba0.85Ca0.15Zr0.1Ti0.9O3 (BCZT) has been found to be a competitive lead-free piezoceramic candidate and was prepared by a sol–gel technique due to its small particle size and homogeneous particle size distribution, but the sintering temperature is still quite high in the previous reports. In the present paper, lithium carbonate (Li2CO3) was used as a sintering aid and dopant for the sol–gel-derived piezoceramic powder, to facilitate the sintering process and adjust the densification, the microstructures and functional properties. With the addition of 0.5 wt% Li2CO3 sintered at 1300 °C, a high relative density 96% with piezoelectric coefficient d33 ~447 pC/N, planar coupling coefficient kp ~0.51, and Curie point TC ~98.7 °C was obtained. The way to properly define the critical changing points on temperature-dependent dielectric curves were further discussed. By altering sintering temperature and the amount of dopant, the mutual influence between the microstructures and the functional properties was explained, to further guide shaping BCZT in more complexed connectivities.

压电Ba 0.85 Ca 0.15 Zr 0.1 Ti 0.9 O 3（BCZT）是一种有竞争力的无铅压电陶瓷候选材料，由于其粒径小且粒径分布均匀，因此采用溶胶-凝胶技术制备，但是烧结在以前的报告中温度仍然很高。在本文中，碳酸锂（Li 2 CO 3）被用作溶胶-凝胶衍生的压电陶瓷粉末的烧结助剂和掺杂剂，以促进烧结过程并调节致密化，微观结构和功能特性。添加0.5重量％的Li 2 CO 3在1300℃，高的相对密度为96％与压电系数烧结d 33〜447 PC / N，平面耦合系数ķ p〜0.51，并且居里点Ť Ç〜98.7°下获得的C。进一步讨论了在温度相关介电曲线上正确定义临界变化点的方法。通过改变烧结温度和掺杂剂的量，解释了微观结构和功能特性之间的相互影响，以进一步指导在更复杂的连接中成形BCZT。