YSZ Pellets for Solid Oxide Fuel Cells Final Presentation Presented by: Lazo Trkulja Advisor: Professor Elliott Slamovich Graduate Student Advisor: Jeff.

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Presentation transcript:

YSZ Pellets for Solid Oxide Fuel Cells Final Presentation Presented by: Lazo Trkulja Advisor: Professor Elliott Slamovich Graduate Student Advisor: Jeff Reding

Outline Overview of SOFC’s Showing how research fits into big picture YSZ pellet processes Ball milling, pressing, bisquing Obtaining Data for comparisons Profilometer and peak edge removal measurements Results and Conclusions

Solid Oxide Fuel Cells How do SOFC’s work? Anode ReactionCathode Reaction Picture obtained from

Goal Electrolyte Anode rather than

YSZ Pellet Processing Combining components to form a slurry YSZ powder, binder (Duramax HA-8), dispersant (Duramax D-3005), DI water Ball Milling Followed by drying of slurry in oven Pellet Pressing Application of stearic acid to die Approx. 68 MPa for approx. 1 min. Bisquing Early stage of sintering.

YSZ Pellet Processing

Profilometer Tencor Surface Profilometer stylus

Profilometer Average Surface Roughness ( ) Used to compare pellets

Roughness Data

Data

Histogram

Data

Edge Removal Data Measuring Edge Removals

Edge Removal Data

Conclusions Definitive pellet set cannot be reached Trade-off between 2% and 4% sets User determines pellet priorities Pellet pressing is key in pellet quality Uniform application of stearic acid on die Careful handling of pellet after ejection

Acknowledgements Professor Elliot Slamovich Jeff Reding MSE faculty, staff, and students

Questions?

Trade-off Factor2% Binder Set4% Binder Set StrengthX Lower Roughness XX Avg. Edge Removal Length X Lower Number of Edge Removals X

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