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Glass based hydrogen barriers

玻璃基氢屏障

基本信息

批准号：
192281186
负责人：
Professor Dr.-Ing. Joachim Deubener
金额：
--
依托单位：
Institut für Nichtmetallische Werkstoffe
依托单位国家：
德国
项目类别：
Research Grants
财政年份：
2011
资助国家：
德国
起止时间：
2010-12-31 至 2018-12-31
项目状态：
已结题

来源：
https://gepris.dfg.de/gepris/projekt/192281186?language=en
关键词：
Glass based hydrogen barriers

项目摘要

Glass containers for long term H2 storage, as for mobile electronic devices and off-grid systems, rely on chemically durable glasses of easy workability and low H2 permeability (< 10-20 mol s-1 Pa-1 m-1 @ 200C). The development of such glasses is still difficult due the lack of correlations between basic glass structure parameters and H2 permeation proved by systematic experimental investigations. During the first stage of our project, we could show that H2 permeation is governed by two factors independently: the atomic packing density (ionic porosity) and the topology of the glass network. The applied second stage of the project should therefore focus on the variation of atomic packing density of a given glass network topology by means of chemical strengthening (alkaline exchange), controlled cooling (fictive temperature) and Ar pressure treatments (mixed gas effects). Although promising basic insights into the structural mechanism of H2 permeation in glass, such phenomena have not been addressed so far. The EGA powder method refined during the first project stage allows measuring the required very low H2 permeability data. The results intended herewith offer essential contributions to the development of efficient H2 storage devices or protection barriers and will improve the basic understanding of related structural mechanisms in glasses.

用于长期储存氢气的玻璃容器，如移动电子设备和离网系统，依赖于易于加工和低氢气渗透率（< 10-20 mol s-1 Pa-1 m-1 @ 200C）的化学耐用玻璃。由于缺乏系统实验研究证明的基本玻璃结构参数与H2渗透率之间的相关性，这种玻璃的开发仍然很困难。在我们项目的第一阶段，我们可以证明H2渗透是由两个因素独立控制的：原子堆积密度（离子孔隙度）和玻璃网络的拓扑结构。因此，该项目的第二阶段应用应侧重于通过化学强化（碱性交换）、控制冷却（有效温度）和Ar压力处理（混合气体效应）来改变给定玻璃网络拓扑结构的原子填充密度。虽然对H2在玻璃中渗透的结构机制有了基本的认识，但这种现象到目前为止还没有得到解决。在第一个项目阶段改进的EGA粉末方法可以测量所需的极低H2渗透率数据。本文的研究结果为开发高效的H2存储装置或保护屏障提供了重要的贡献，并将提高对玻璃中相关结构机制的基本理解。