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Have we forgotten lightbulbs, CRTs, and a myriad of other vacuum tubes used to be a thing? They used the alloy 'kovar' for much greater temperature variation to
by ganzuul 8y ago
Have we forgotten lightbulbs, CRTs, and a myriad of other vacuum tubes used to be a thing? They used the alloy 'kovar' for much greater temperature variation tolerance than this new tech was tested for.
- syntaxing 8y agoKovar is still widely used. Besides the low thermal expansion coefficient, the thermal expansion is extremely close to quartz which makes it ideal for optic purposes.