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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Measurement of progressive stress buildup during ion exchange in alkali aluminosilicate glass
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Measurement of progressive stress buildup during ion exchange in alkali aluminosilicate glass

机译：碱金属硅铝酸盐玻璃离子交换过程中渐进应力累积的测量

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摘要

A mixed-alkali aluminosilicate glass (glass transition temperature, T-g = 460 degrees C) was ion exchanged at 375 degrees C in a fused silica cell in the hot-stage of a polarizing microscope. Buildup of stress-induced optical birefringence was measured as a function of the depth below the surface and time of exchange to 8 h. Surface compression increased steadily during this period. Upon rapidly cooling the specimen to room temperature, stresses decreased similar to 20%, without a significant change in the thickness of the compression layer implying that the surface layer had a higher thermal contraction following the exchange. Differential thermal contraction of ion-exchanged layers could not have been the cause of either large differences between calculated stress magnitudes from those observed experimentally, or the observed "anomalous" tensile stress maximum. It is argued that the ion-exchanged layers are stuffed derivatives having physical properties different from those of the parent glass or the as-melted glasses of corresponding compositions. (C) 1998 Elsevier Science B.V. All rights reserved. [References: 13]
机译：在偏光显微镜的热台中，在熔融石英池中于375℃对混合碱金属铝硅酸盐玻璃（玻璃化转变温度，T-g = 460℃）进行离子交换。应力诱导的光学双折射的累积被测量为表面以下深度和交换至8 h的时间的函数。在此期间，表面压缩稳定增加。在将样品快速冷却至室温后，应力降低了约20％，压缩层的厚度没有明显变化，这表明表层在更换后具有更高的热收缩率。离子交换层的热收缩差异可能不是导致实验得出的计算应力幅度之间存在较大差异，也可能不是观察到的“异常”拉伸应力最大值之间的差异。认为离子交换层是填充的衍生物，其物理性质不同于母玻璃或相应组成的熔融玻璃的物理性质。 （C）1998 Elsevier Science B.V.保留所有权利。 [参考：13]

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