Electronic Materials Research Laboratory (Key Lab of Education Ministry), State Key Laboratory for Mechanical Behavior of Materials and School of Electronic and Information Engineering, Xi'an Jiaotong University, Xi'an 710049, China.
State Key Laboratory for Mechanical Behavior of Materials, Xi'an Jiaotong University, Xi'an 710049, China.
Science. 2023 Apr 7;380(6640):87-93. doi: 10.1126/science.adf6161. Epub 2023 Apr 6.
The piezoelectric properties of lead zirconate titanate [Pb(Zr,Ti)O or PZT] ceramics could be enhanced by fabricating textured ceramics that would align the crystal grains along specific orientations. We present a seed-passivated texturing process to fabricate textured PZT ceramics by using newly developed Ba(Zr,Ti)O microplatelet templates. This process not only ensures the template-induced grain growth in titanium-rich PZT layers but also facilitates desired composition through interlayer diffusion of zirconium and titanium. We successfully prepared textured PZT ceramics with outstanding properties, including Curie temperatures of 360°C, piezoelectric coefficients of 760 picocoulombs per newton and of 100 millivolt meters per newton, and electromechanical couplings of 0.85. This study addresses the challenge of fabricating textured rhombohedral PZT ceramics by suppressing the otherwise severe chemical reaction between PZT powder and titanate templates.
锆钛酸铅（Pb(Zr,Ti)O 或 PZT）陶瓷的压电性能可以通过制造具有特定取向的织构陶瓷来增强。我们提出了一种种子钝化的织构化工艺，使用新开发的 Ba(Zr,Ti)O 微板模板来制造织构化 PZT 陶瓷。该工艺不仅确保了钛富 PZT 层中模板诱导的晶粒生长，而且通过锆和钛的层间扩散促进了所需的组成。我们成功制备了具有优异性能的织构化 PZT 陶瓷，其居里温度为 360°C，压电系数为 760 皮库仑/牛顿和 100 毫伏/牛顿，机电耦合系数为 0.85。本研究通过抑制 PZT 粉末和钛酸盐模板之间通常会发生的剧烈化学反应，解决了织构化菱形 PZT 陶瓷的制造难题。
