Sintering and Catalysis

ISBN-13: 9781468409369 / Angielski / Miękka / 2012 / 512 str.

G. Kuczynski

Opis

The proceedings of the 4th International Conference on Sin- tering and Related Phenomena, contained in this volume, have been broadened in scope to include the phenomena of sintering and coa- lescence of catalytic materials dispersed upon refractory oxides. For it has long been recognized within the circles of chemists and chemical engineers working in the field of catalysis that one of the chief causes of the decline in heterogeneous catalytic activity and/or selectivity is, indeed sintering, or perhaps using a better term, coalescence of the supported catalytic metal and compounds thereof. Essentially catalytic deactivation by sintering is now weIl recognized as Ostwald ripening; which of course is a phenome- non familiar to scientists grappling with the problem of sintering of powder compacts. The 4th Conference at Notre Dame marks the first occasion at which scientists and engineers of each discipline were assembled in the same room to exchange views on these phenome- na of mutual concern. In the wake of the Conference at Notre Dame, all parties acknowledged the synergistic benefit which issued from this exchange, both at the formal and informal level. All were persuaded that signal benefits will be realized by a continuation of this collab- oration in the form of future sintering conferences in which both powder metallurgists and catalytic scientists and engineers would participate.

Spis treści

Fine Particle Dispersions.- 1. Transmission Electron Microscopy — Some Techniques Useful in Sintering Studies.- 2. Structure and Thermodynamic Properties of Microclusters.- 3. Preparation and Thermostability of Supported Metal Catalysts.- Sintering of Catalysts.- 4. Sintering and Catalysis.- 5. Crystallite Sintering and Growth in Supported Catalysts.- 6. Sintering of Supported Metal Catalysts: Application of a Mechanistic Model to Experimental Data.- 7. Effects of Gas- and Liquid-Phase Environments on the Sintering Behavior of Platinum Catalysts.- 8. Sintering Retardation in Catalysts.- 9. Sintering of Supported Metals.- 10. Quasi-Equilibria and Sintering in the Cobalt Oxide — Zirconia Catalyst — Support System.- 11. A Study of Capillarity and Mass Transport on the Al2O3 Surface.- 12. Sintering of Pelleted Catalysts for Automotive Emission Control.- 13. Effect of Ambient Atmosphere on Sintering of ?-Al2O3 Supported Pt Catalysts.- 14. Zeolite Chemistry and Reactions.- Mechanisms of Sintering.- 15. Thermodynamic Aspects of Solid State Sintering.- 16. Contributions of Grain Boundary and Volume Diffusion to Shrinkage Rates during Sintering.- 17. A Kinetic Model for the Reduction in Surface Area during Initial Stage Sintering.- 18. The Identification of the Initial-Stage Sintering Mechanism: A New Approach.- 19. Effect of BeO Inclusions on the Rate of Sintering of Cu Wires.- 20. Shrinkage and Rearrangement during Sintering of Glass Spheres.- 21. Evidence for Enhanced Grain Boundary Heterodiffusion.- 22. Densification Kinetics of Electrolytic Silver Powder Compact.- 23. Kinetics and Mechanism of the Initial Stage of Sodium Fluoride Sintering under Non-Isothermal Conditions.- 24. Statistical Approach to the Theory of Sintering.- 25. The Contribution of Diffusional Flow Mechanisms to Microsegregation in Silver-Gold Alloys.- 26. Some Analysis of Microsegregation by Surface Transport during Sintering.- Liquid Phase Sintering and Ostwald Ripening.- 27. Sintering in the Presence of Liquid Phase.- 28. Sintering of MgAl2O4 in the Presence of Liquid Phase.- 29. The Growth of Solid Particles in Some Two-Phase Alloys during Sintering in the Presence of a Liquid Phase.- 30. Investigation of Microstructure Development in RuO2-Lead Borosilicate Glass Thick Films.- Sintering of Oxides.- 32. The Oxygen Probe as a Ceramic System.- 33. The Sintering of Strontium Containing Perovskites.- 34. Influence of MgO on the Evolution of the Microstructure of Alumina.- 35. Reaction Sintering of CoO-NiO System.- 36. Observations on the Reaction Sintering of Oxide Systems.- Pressure Sintering.- 37. The Development of Pressure Sintering Maps.- 38. Interpretation of Hot Pressing Kinetics by Densification Mapping Techniques.