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YSZ Pellets for Solid Oxide Fuel Cells Final Presentation

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

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YSZ Pellets for Solid Oxide Fuel Cells Final Presentation

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

  2. 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

  3. Solid Oxide Fuel Cells • How do SOFC’s work? Anode Reaction Cathode Reaction Picture obtained from http://www.iit.edu/~smart/garrear/fuelcells.htm.

  4. Goal Electrolyte Anode rather than

  5. 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 .

  6. YSZ Pellet Processing

  7. Profilometer • Tencor Surface Profilometer stylus

  8. Profilometer • Average Surface Roughness ( ) • Used to compare pellets

  9. Roughness Data

  10. Data

  11. Histogram

  12. Data

  13. Data

  14. Edge Removal Data • Measuring Edge Removals

  15. Edge Removal Data

  16. Edge Removal Data

  17. 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

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

  19. Questions?

  20. Trade-off

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