Chalcogenide glass for infrared optical fiber and preparation method thereof
A chalcogenide glass and infrared light technology, applied in the field of infrared optical fiber matrix materials, can solve the problems of low glass hardness, poor chemical stability, high impurity content, and achieve high mechanical strength of glass, strong anti-devitrification ability, and chemical stability. Good results
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Embodiment 1
[0036] A chalcogenide glass for infrared optical fiber, the specific preparation method is as follows:
[0037] (1) Pretreatment of quartz tube:
[0038] Clean the quartz tube in an ultrasonic cleaner for 15min to 45min, wash it with deionized water for 1 to 2 times, soak it in 25 hydrofluoric acid for 15min to 60min, rinse it with deionized water for 3 times, and then wash it at 200℃ Drying, and finally drying in a vacuum oven at 1000°C for 2 to 5 hours;
[0039] (2) Pretreatment of glass raw material S:
[0040] Distillation is usually used to purify glass raw materials. Considering that S powder contains more impurities, it is mainly processed for S powder. Using high-purity raw materials with an S content greater than 99.999%, heat a U-shaped quartz tube with S on one side to 80-105°C under vacuum to remove moisture as much as possible. Then place one side of the U-shaped quartz tube with S at 350-400°C and the other side at room temperature to sublimate and purify S to...
Embodiment 2
[0049] Example 2: The specific preparation method is basically the same as that of Example 1, except that the molar fractions of the components of the chalcogenide glass for the infrared optical fiber are: Ga 2 S 3 : 60, GeS 2 : 15, La 2 S 3 : 2.5, La 2 o 3 : 20, BiCl 3 : 2.5; In step (5), the glass melting temperature is adjusted to 1050°C, and the annealing temperature is adjusted to 650°C.
[0050] As can be seen from the test results in Table 2, the infrared transmission curve of the chalcogenide glass for infrared optical fiber obtained in Example 2 is flat, the thermal characteristic temperature difference is 165°C, and the Knuckle hardness is 231Kg / mm 2 , indicating that the glass is not easy to crystallize, OH - The content of impurities in the infrared band is low, and the hardness is equivalent to that of fluoride glass, which is very suitable for drawing optical fibers.
Embodiment 3
[0051] Embodiment 3: The specific preparation method is basically the same as that of Embodiment 1, except that the molar fractions of the components of the chalcogenide glass for the infrared optical fiber are: Ga 2 S 3 : 70, GeS 2 : 10, La 2 S 3 : 7.5, La 2 o 3 : 10, BiCl 3 : 2.5. In step (5), the glass melting temperature is adjusted to 1050°C, and the annealing temperature is adjusted to 705°C.
[0052] As can be seen from the test results in Table 2, the infrared transmission curve of the chalcogenide glass for infrared optical fiber obtained in Example 3 is flat, the thermal characteristic temperature difference is 188°C, and the Knuckle hardness is 245Kg / mm 2 , indicating that the glass is not easy to crystallize, OH - The content of impurities in the infrared band is low, and the hardness is equivalent to that of fluoride glass, which is very suitable for drawing optical fibers.
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