This symposium highlights experimental and computational research aimed at understanding point defect equilibria and kinetics in ceramic materials. Defect chemistry governs conductivity in electronic, ionic, and mixed-conducting ceramics, and these materials are important for numerous applications, including solid-state batteries, memristors, dielectrics, solid oxide fuel/electrolysis cells, catalysis, and sensors, many of which operate under extreme electrochemical conditions. In addition, defect transport is intimately related to microstructure evolution and many material degradation phenomena.

We encourage symposium contributions that help establish a greater understanding of our ability to predict, design, and control defects to enhance ceramic properties and performance, including under extreme far-from-equilibrium conditions. This furthermore includes the influence of dislocations and grain boundaries as higher-dimensional defects.

Proposed sessions

  • Predictive point defect energetics and equilibria from density functional theory and other computational methods
  • Structure and stability of defects and defect complexes via in-situ measurement (e.g., EPR, TSDC, EXAFS)
  • Point defect segregation to or depletion from dislocations, surfaces, grain boundaries, and interfaces
  • Defect mobility and transport behavior, including under operando or in extreme environments (e.g., temperature, chemical reactions, irradiation)
  • Defect-mediated properties (conductivity, grain growth, creep, magnetism, ferroelectric imprint, dielectric degradation)
  • Impact of dislocations and grain boundaries on ceramic functional properties

 Symposium organizers