In-situ Observation and Evaluation of Silver Precipitation Behavior in Borosilicate Glass
In-situ Observation and Evaluation of Silver Precipitation Behavior in Borosilicate Glass
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硼硅酸盐玻璃中银沉淀行为的原位观察与评价
DOI：
10.1016/j.precisioneng.2023.03.016
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发表时间：
2023
期刊：
影响因子：
--
通讯作者：
Hirofumi Hidai
中科院分区：
文献类型：
--
作者：
Miyuka Kono;Hirofumi Kawamura;Souta Matsusaka;Sho Itoh;Hirofumi Hidai
在用固态离子交换法掺杂银离子的含碱玻璃上施加电压，在玻璃内部产生银沉淀。我们试图通过对银析出现象的现场观察，来阐明电压方向旋转90°时银的析出机制。与我们以前的方法相比，增加了降水面积。结果表明，随着外加电压的升高，析出物的形态由块状转变为树枝状。由介电击穿模型预测的析出物的形状表明，析出率越高(即银离子与析出物相遇的频率越高)，析出物形成的分支就越多。此外，玻璃内部的未掺杂、银掺杂和银沉淀区被模拟为电阻，以预测沉淀区的生长行为。
Applying voltage to alkali-containing glass, doped with silver ions by the solid-state ion-exchange method, yields silver precipitates inside the glass. We attemptedin-situobservation of the precipitation phenomena to elucidate the silver precipitation mechanisms, where the direction of the voltage application was rotated 90 deg. to increase the precipitation area compared to that of our previous method. The results show that the shape of the precipitate changed from clumpy to dendritic as the applied voltage increased. The shape of the precipitate, predicted by the dielectric breakdown model, implied that the higher the precipitation probability (i.e., the higher the frequency of a silver ion to encounter with the precipitate), the more branches the precipitate formed. In addition, the un-doped, silver-doped, and silver-precipitated areas inside the glass were modeled as electrical resistances to predict the growth behavior of the precipitated areas.