Perovskite Materials Prepared by Aqueous Combustion Synthesis for Fuel Cell Applications

Introduction

Aqueous Combustion Synthesis

EXPERIMENTAL PROCEDURE

Different Reaction Modes

Temperature time profile for SHS mode

Modes of Synthesis:  SCS (j <  0.7)

Modes of Synthesis:  VCS (0.7 <  j <  1.25)

Modes of Synthesis:  SHS (j > 1.25)

Microstructure: As-Synthesized Powders

Microstructure: Calcined Powders

BET Surface Area Measurements

Microstructure: Uncalcined Sintered Materials

Microstructure: Calcined Sintered Materials

Relative Initial and Final Densities

Electrical Conductivity Measurements

Electrical conductivity comparison

Oxygen Permeability Measurements

Arrhenius Plot of Oxygen Permeation

Oxygen Permeability Measurements

Temperature Dependence of s_ion

CONCLUSIONS