Effect of temperature on the properties of high silicon-based glass fiber and its mechanism
Aiming at the problem that the performance and production utilization rate of high silica-based glass fiber precursor coated with paraffin-based sizing agent decrease at high temperature,the influence law of temperature on its performance is deeply studied and the mechanism is discussed.The properties of different forms of high silica-based glass fiber precursors at different temperatures and different storage time were characterized by infrared,thermogravimetry and scanning electron microscopy.The results show that with the increase of temperature,the alkalinity of the leaching solution increases,and the mechanical properties decrease.At the same time,the more crystals are precipitated on the surface of the fiber fila-ment,and carbonate exists.Therefore,it can be concluded that the fundamental reason why temperature affects the properties of high silica matrix glass fiber may be that high temperature promotes the movement of Na+in the fiber and accelerates its ion exchange with H+in water molecules on the fiber surface,thus accelerating the destruction of fiber structure and leading to the decline of performance.
high silica matrix fiber glasssizing agenttemperatureion exchange
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