Interpreting equilibrium-conductivity and conductivity-relaxation measurements to establish thermodynamic and transport properties for multiple charged defect conducting ceramics

Abstract

A model-based interpretation of measured equilibrium conductivity and conductivity relaxation is developed to establish thermodynamic, transport, and kinetics parameters for multiple charged defect conducting (MCDC) ceramic materials. The present study focuses on 10% yttrium-doped barium zirconate (BZY10). In principle, using the Nernst–Einstein relationship, equilibrium conductivity measurements are sufficient to establish thermodynamic and transport properties. However, in practice it is difficult to establish unique sets of properties using equilibrium conductivity alone. Combining equilibrium and conductivity-relaxation measurements serves to significantly improve the quantitative fidelity of the derived material properties. The models are developed using a Nernst–Planck–Poisson (NPP) formulation, which enables the quantitative representation of conductivity relaxations caused by very large changes in oxygen partial pressure.

Document Details

Document Type
Pub Defense Publication
Publication Date
Jan 01, 2015
Source ID
10.1039/c5fd00012b

Entities

People

  • Huayang Zhu
  • Robert J. Kee
  • Sandrine Ricote
  • W. Grover Coors

Organizations

  • Colorado School of Mines
  • Office of Naval Research
  • United States Army

Tags

Fields of Study

  • Materials science

Readers

  • Combustion science or combustion engineering.
  • Computer Vision.
  • Materials Science and Engineering.