Alumina fibers were prepared by sol-gel method using an in-house fabricated extruder. The starting material used for the preparation of alumina sol was aluminiurn-tri-isopropoxide. A suitable binder was added to the sol and aged at room temperature for gelation to occur. When the sol became a paste appropriate for extrusion, the fibers were drawn through the extruder and dried at room temperature and subsequently sintered at 1200, 1400, and 1600 C deg in air. It was found that regardless of sintering temperature, the XRD traces indicated that the only phase present in sintered fibers was alpha-Al2O3. Thermogravimetric analysis of the extruded fibers indicated that most of the volatile compounds were burned out at 500 C deg. The DTA and FTIR studies confirmed the phase transition to alpha-Al2O3 and this was in good agreement with the XRD analysis. The SEM investigation revealed that a dense microstructure formed when fibers sintered at 1600 C deg. In addition, the SEM micrograph revealed that an intergranular fracture was the predominant fracture mode. Mechanical tests indicated that the optimum tensile strength was achieved for fibers sintered at 1600 C deg.


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Sol-gel based extrusion of alumina fibers


    Contributors:

    Published in:

    Publication date :

    2006


    Size :

    5 Seiten, 13 Bilder, 1 Tabelle, 21 Quellen




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English




    Development of polyurethane based conducting nanocomposite fibers via twin screw extrusion

    Bhattacharyya, A. / Joshi, M. | British Library Online Contents | 2011


    Fabrication and characterization of chalcogenide polarization-maintaining fibers based on extrusion

    Jiang, Ling / Wang, Xunsi / Guo, Fangxia et al. | British Library Online Contents | 2017


    Autos put a new spin on alumina fibers

    Epply, S.W. | Tema Archive | 1996


    Autos put a new spin on alumina fibers

    Epply,S.W. | Automotive engineering | 1996


    EXTRUSION OF AP COMPOSITE PROPELLANT WITH SELF-ALIGNED REACTIVE FIBERS

    Collard, Diane N. / Curtiss, Jacob A. / Gomez, Mateo et al. | TIBKAT | 2021