Dissertation > Excellent graduate degree dissertation topics show

Study on Composition,Structure and Properties of ρ-AL2O3 Bonded Alumina-Magnesia Castable

Author: ZhangYeFan
Tutor: LiZuo
School: Wuhan University of Science and Technology
Course: Inorganic non-metallic materials
Keywords: ρ-Al2O3 Alumina-magnesia Castable Rheological behavior Slag resistance
CLC: TB321
Type: Master's thesis
Year: 2004
Downloads: 240
Quote: 0
Read: Download Dissertation

Abstract


At first, the rheological behaviors of ρ-Al2O3 bonded Alumina-magnesia suspension was studied in this paper. The effect of dispersing agents and composition on rheological behaviors was studied by means of rotary viscosimetor. The result shows the suspension’s rheological behaviors is approximately as same as pseudoplastic fluid’s, the viscosity of suspension increases with increasing of ρ-Al2O3 ultra fine powder or microsilica content and decrease with the increasing of magnesia powder. Adding 0.3wt% hexametaphosphate as dispersing agent, the matrix of Alumina-Magnesia castable bonded by ρ-Al2O3 ultra fine powder may obtain the optimum flowabiliry.Secondly, the reaction between ρ-Al2O3 ultra fine and magnesia powder was studied. The influence of temperature and hydration on it was studied by means of X-Ray diffraction analysis(XRD), so did the phase at different temperature. The result shows the reaction activity of ρ-Al2O3 ultra fine powder after hydration is higher than that before hydration, because ρ-Al2O3 ultra fine powder after hydration transform to -Al2O3 earlier than that before. After 1600 C sintering for 3 hours, the matrix of Alumina-Magnesia castable bonded by ρ-Al2O3 ultra fine powder main is spinel.At last, the influence of composition on microstructure and properties of ρ-Al2O3 bonded Alumina-Magnesia castable was studied. The effect of ρ-Al2O3/a-Al2O3 ratio, magnesia powder and microsilica addition on properties, slag resistance of Alumina-magnesia castable was studied by scanning electronic microscope (SEM) and energy dispersive spectrum analysis (EDS), and the mechanism of slag corrosion was analyzed. It is found that the matrix compositions, such as ρ-Al2O3/a-Al2O3 ratio, magnesia powder and microsilica addition, have noticeable influence on the properties of Alumina-Magnesia castable bonded by ρ-Al2O3 ultra fine powder.

Related Dissertations

  1. The Influence of Shear History on Crystallization Behavior of iPP Melt,TQ325.14
  2. Influence of Vitreous Silica and ρ-Al2O3 on the Performance of the Magnesian Slag Trap in Tundish,TG113.14
  3. Studies on Preparation and Application of Modified Asphalt Emulsion,TE626.86
  4. Rheological Study of an Acrylic Cement Itself and It’s Infiltration in Compacted Cancellous Bone,R683
  5. The Morphology Evolution and Rheological Behavior of HDPE/PA Blends,TQ317.4
  6. Carbon aluminum titanium nitride composites synthesized by hydrothermal method corundum material impact,TQ163.2
  7. The Studies of Dynamic Rheological Behavior of Polyethylene, Polypropylene and Their Color Masterbatches,TQ325
  8. The Synthesis of Acrylate polyurethane and the study of Rheological behavior,TQ633.9
  9. Preparation and Properties of the Key Materials for Planar Solid Oxide Fuel Cells,TM911.4
  10. Application of Water-soluble Chitosan Derivertives in Antibacterial Viscose Fiber,TQ342.8
  11. Modification Study of PVC Blended with New MBS,TQ325.3
  12. Study on the Polymerization and Rheological Behavior of Polybenzimidazole in Ionic Liquids,O633.5
  13. Study on Preparation and Properties of In-Situ-Compatibilized PP/POE Blends,TQ325.14
  14. Relationship between Spinning Technology and Structure-Property of Polyarylsulphonamide Fiber,TQ340.64
  15. Conductive and rheological behavior under heat treatment of conductive polymer composites,TB324
  16. Study on Green Non-halogen Flame Retardance and Rheological Behavior of PE/Ca(OH)2 Composites,TQ325.12
  17. Study on Microstructure and Rheological Behavior of In-stu Mg2Si/AM60 Composites,TB33
  18. The Study of Barrier HDPE/PA Materials,TQ325.12
  19. Preparation of Nylon 6 with High Viscosity by Chain-extension during Melting Extrusion,TQ323.6
  20. Research on Dissolution and Regeneration of Silk Fibroin with Ionic Liquid as Solvent,R318.08

CLC: > Industrial Technology > General industrial technology > Materials science and engineering > Non-metallic materials > Non-organic materials
© 2012 www.DissertationTopic.Net  Mobile