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• 12:02, 6 September 2022 Admin talk contribs deleted page Glass-ceramic-to-metal seals (content was: "{{multiple issues|{{no footnotes|date=June 2017}} {{one source|date=June 2017}}}} Glass-to-metal seals have been around for many years, with one of the most common uses being lamp bulb seals. A more recent invention is '''glass-ceramic-to-metal seals'''. ==Properties== ''Glass-ceramics'' are polycrystalline ceramic materials prepared by the controlled crystallization of suitable glasses, normally silicates. Depending on the starting glass composition and the heat-t...")