|About this Abstract
||MS&T23: Materials Science & Technology
||Grain Boundaries, Interfaces, and Surfaces: Fundamental Structure-Property-Performance Relationships
||The Formation of Stacking Faults in Barium Zirconate Type Perovskites
||Dylan Jennings, Julian N Ebert, Hongchu Du, Qianli Ma, Laura-Alena Schäfer, Doris Sebold, Joachim Mayer, Wolfgang Rheinheimer
|On-Site Speaker (Planned)
Yttrium-doped barium zirconate (BZY) is a proton conducting perovskite with potential uses in a variety of applications, including as an electrolyte for fuel and electrolytic cells. Crystalline defects in the material are critical to its performance, impacting properties such as protonic conduction, mechanical behavior, and catalytic activity. The presented work discusses the discovery of stacking faults in conventionally sintered BZY20 at different measured A/B-ratios (BaxZr0.8Y0.2O3-δ, x = 0.989, 1.001, and 1.006). Two structurally unique stacking faults are observed for the first time in BZY, i.e. Ruddlesden-Popper (RP) type and non-RP type. Characterization of stacking faults using high resolution S/TEM provides insight to the formation process of Ruddlesden-Popper faults in BZY-type materials. Electrochemical impedance spectroscopy is presented to analyze the impact of stacking faults on material conductivity, and other impacts of stacking faults on material properties are discussed.