The present invention discloses a method for testing the
crystallization rate of
glass fiber, comprising the following steps: heating a
glass fiber sample to be tested to melt it; rapidly cooling the
molten glass fiber sample to automatically explode into a plurality of glass blocks; placing the plurality of glass blocks on a carrier; placing the carrier in a
crystallization gradient furnace; keeping the plurality of glass blocks warm in the
crystallization gradient furnace for t1, t2, t3, t4, t5, t6, t7, t8, t9, t10, t11, t12, t13, t14, t15, t16, t17, t18, t19, t20, t21, t22, t23, t24, t25, t26, t27, t28, t29, t30, t31, t32, t33, t34, t35 x‑1 ,t x ,t x+1 ···t n After the
fiber is taken out, the length of the glass crystallization region corresponding to each time point of the removal is measured, and a curve diagram of the glass crystallization region length and time is constructed to obtain the
glass fiber crystallization rate, t x‑1 ,t x ,t x+1 At the three time points, the length of the glass crystallization area is basically the same, and the glass crystallization area is the area where the glass loses its transparency. This method can simply, intuitively and quickly test the
crystallization rate of glass
fiber.