纤维负重法测量玻璃退火上下限温度的影响因素研究

Study on the Influencing Factors of the Upper and Lower Limits of Glass Annealing Temperature Using Fiber Weight-bearing Method

通过机械拉丝工艺制备不同直径、圆柱度的玻璃纤维,采用纤维负重法测试玻璃退火上下限温度,探究纤维几何参数、载重砝码质量和控温条件对测试结果的影响。结果表明:退火上下限温度会随着玻璃纤维直径的增大而升高,随着砝码质量的增加而降低,随着圆柱度的增加而降低。初始温度和升温速率对退火上下限温度无明显影响,但随着降温速率的加快,退火温度随之升高。根据验证结果,测试玻璃退火上下限温度适宜的条件:纤维直径为0.6~0.8 mm,圆柱度尽可能小,载重砝码质量为800~1000 g,升温速率为5℃/min,降温速率为4℃/min;同时,考虑到测试的安全性,初始温度建议选择较低温度进行实验。

Glass fibers with different diameters and cylindricity were prepared by mechanical wire drawing process,and the upper and lower limits of glass annealing temperature were tested by fiber weight-bearing method,and the effects of fiber geometric parameters,load weight quality and temperature control conditions on the upper and lower limits of annealing temperature test results were investigated.The results show that the upper and lower limits of annealing temperature increase with the increase of glass fiber diameter and decreases as weight mass increases.With the increase of cylindricity,the temperature of the upper and lower limits of annealing decreases.According to the verification results,the suitable conditions for testing the upper and lower limit temperature of glass annealing are that the fiber diameter of 0.6~0.8 mm,the load weight of 800~1000 g,the heating rate of 5℃/min,and the cooling rate of 4℃/min,and at the same time,taking into account the safety of the test,the initial temperature is recommended to choose a lower temperature for the experiment.