Preparation and dielectric properties of ZrO2 over-substituted barium zirconate titanate ceramics by direct writing 3D printing
采用直接写入式3D打印技术制备ZrO2过取代锆钛酸钡陶瓷及其介电性能
Zuohao Qiu, Gaoyuan Chen, Xixi Bao, Jitao Xu, Chengyi Chu, Guangjian Peng, Jianjun Guo, Yuchuan Cheng, Aihua Sun*
邱琢皓，陈高远，鲍希希，许继涛，储成义，Guangjian Peng,郭建军，程昱川，孙爱华*
全文链接：https://www.sciencedirect.com/science/article/pii/S0925838825021954
Abstract
钛酸钡陶瓷因其优异的介电性能，在陶瓷电容器领域展现出巨大的应用潜力。然而，随着电子元件高度集成化的发展，制备具有复杂结构设计的高容量陶瓷电容器已成为当前研究的重点。本研究首先采用直接墨水书写（DIW）技术制备了复杂结构的锆钛酸钡陶瓷。随后，基于锆取代对钛酸钡相变温度的调控作用，我们合理设计了不同化学计量比的锆取代钛酸钡陶瓷，以调控锆钛酸钡陶瓷的三相转变温度，并进一步优化了过取代锆钛酸钡陶瓷的烧结温度，从而提高了钛酸钡的介电性能。结果表明，固含量为65%时，陶瓷的成型精度和致密度均达到最佳。此外，过量取代的氧化锆会改变钛酸钡的相结构，增加四方相的比例，从而提高样品的介电常数。值得注意的是，在所有测试的烧结温度下，1400℃烧结的样品具有最高的四方相氧化锆-钛酸钡比例和最佳的介电常数。这项研究为制备和应用具有复杂结构的锆取代钛酸钡陶瓷提供了宝贵的技术和理论见解。
Barium titanate ceramics exhibit great potential in ceramic capacitors due to their excellent dielectric properties. However, with the highly integrated advancement in electronic components, the preparation of high-capacitance ceramic capacitors with complex structural design has been the focus in current research. In this study, the complex structural barium zirconium titanate is first prepared through direct ink writing (DIW) technique. Subsequently, based on the regulation of zirconium substitution on the phase transition temperature of barium titanate, we reasonably designed zirconium-substituted barium titanate ceramics with varying stoichiometric ratios to regulate the three-phase transition temperatures of zirconium titanate ceramics, and following optimized the sintering temperature of the over-substituted barium zirconium titanate, thus improving the dielectric properties of the barium titanate. The results demonstrate that the solid content of 65 % exhibited the optimal forming precision and the highest densification. Additionally, the over-substituted zirconia alter the phase structure of barium titanate, increasing the proportion of tetragonal phase and subsequently elevating the dielectric constant of the specimens. Notably, among all sintering temperatures tested, the specimen sintered at 1400 °C display the highest proportion of tetragonal zirconia-barium titanate and an optimal dielectric constant. This research offers valuable technical and theoretical insights for the preparation and utilization of zirconium-substituted barium titanate ceramics with intricate structures.