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Or even without the chilling. CRT televisions had zeolite as vacuum pump as well. They kept vacuum for up to decades.
by Fronzie 5y ago
Or even without the chilling. CRT televisions had zeolite as vacuum pump as well.
They kept vacuum for up to decades.
- kragen 5y agoI think CRTs were mostly manufactured using conventional high-vacuum pumps with moving parts or liquids, not sorption pumps. They didn't normally include a pump in the cathode-ray tube itself; the pump stayed at the factory. And I think you're mistaken that the CRTs ever included any zeolite. Perhaps you're confusing zeolites with getters, which react irreversibly with any stray molecules that manage to get into the vacuum?