Se基红外玻璃的微晶强化及模压成型

发布时间：2018-03-24 06:33

  本文选题：红外玻璃　切入点：冷却方式　出处：《西安工业大学》2015年硕士论文

【摘要】：作为一种新型的红外光学材料,硫系玻璃以其性能连续可调、红外透过范围宽、制造成本低、可模压成型而引起了人们的广泛关注。然而硫系玻璃较差的力学性能和均匀性,在一定程度上限制了它的推广和应用。本文研究了Se基红外玻璃的微晶化工艺,试样不同位置下的组织和性能以及模压成型工艺。论文主要研究结果如下：(1)不同冷却方式对玻璃红外透过率和杂质吸收影响很大。空冷试样的红外透过率高于水冷试样,空冷试样在8-12μmm波段红外透过率达70%以上,水冷试样的红外透过率达64%；空冷试样的杂质吸收强度大于水冷试样,由于空冷试样冷速慢,氢在硒中的固溶度随温度的下降逐渐增大,Se-H杂质吸收强度增大。(2)水冷试样断裂韧性较大,更容易获得高强度的硫系玻璃。经Tg+30℃/20h热处理后,水冷试样的断裂韧性值达到0.414Mpa·m1/2,较未热处理值提高了26%,空冷试样的断裂韧性值仅为0.368Mpa·m1/2。(3)硫系玻璃上端的综合性能优于下端,上端样品红外透过率达64%,断裂韧性达0.373Mpa·m1/2,,而下端样品红外透过率达58%,断裂韧性达0.367Mpa·m1/2;边缘样品的综合性能优于玻璃中心,边缘样品红外透过率达65%,致密性好,杂质吸收小,而中心样品红外透过率达60%,析晶能力强,Se-H杂质吸收大。(4)片状模压制品的红外透过率高达55%,成型性好,表面光洁度高,而粉末状模压制品红外透过率为45%,融合性差。获得较优的模压工艺参数为：模压温度310℃,模压压力10kg,保温时间70-90min和保压时间60min。
[Abstract]:As a new type of infrared optical material, sulfur glasses have attracted much attention due to their continuously adjustable properties, wide infrared transmission range, low manufacturing cost and molded molding. However, sulfur glasses have poor mechanical properties and uniformity. To some extent, its popularization and application are limited. In this paper, the process of glass-ceramics based on se is studied. The main results of this paper are as follows: different cooling methods have great influence on the infrared transmittance and impurity absorption of glass. The infrared transmittance of air-cooled sample is higher than that of water-cooled sample. The infrared transmittance of air-cooled sample is more than 70% in 8-12 渭 mm band, and the infrared transmittance of water-cooled sample is 64. The impurity absorption strength of air-cooled sample is higher than that of water-cooled sample, because the cooling rate of air-cooled sample is slow. The solid solubility of hydrogen in selenium increases gradually with the decrease of temperature. The absorption strength of Se-H is increased. 2) the fracture toughness of water-cooled samples is larger and it is easier to obtain high strength sulfur glasses. After heat treatment at 30 鈩，

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