#metal-glass seal Tech News.
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ScienceHackadayabout 3 hours ago
The Problem of Making a Good Metal-To-Glass SealMaking a reliable metal-to-glass seal for vacuum tubes is difficult due to differing thermal expansion properties. Experiments with surface treatments and flattening metal to a sheet showed varying results. The most successful seal used very thin tungsten wire, though it is not a practical conductor.
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