Offenbach : Verlag der Deutschen Glastechnischen Gesellschaft
Doi
Abstract
The fabrication of silica glass fibres by thermoplastie extrusion of nanosize and micron SiO2 powders has been investigated. The powders were mixed with a binder system, compounded for 3 h at 150 °C, and finally extruded through a die with a 500 μm-diameter die land. After debinding the green fibres at 500 °C, these were sintered for 1 h at 1100°C under air to yield glassy and crack-free silica fibres with a final diameter of 400 μm.
The effect of the two different particle size distributions as well as the influence of varying powder loading (between 38 and 58 vol.%) on the rheological properties of the feedstocks were analysed using capillary rheometry. The debinding and sintering behaviour was also investigated using mercury intrusion porosimetry, thermal gravimetrie analysis and dilatometry