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2. Lithium oxide - Wikipedia

   en.wikipedia.org/wiki/Lithium_oxide

   Burning lithium metal produces lithium oxide. Lithium oxide forms along with small amounts of lithium peroxide when lithium metal is burned in the air and combines with oxygen at temperatures above 100 °C: [3] 4Li + O 2 → 2 Li 2 O. Pure Li 2 O can be produced by the thermal decomposition of lithium peroxide, Li 2 O 2, at 450 °C [3] [2] 2 Li ...

3. Cryogenic seal - Wikipedia

   en.wikipedia.org/wiki/Cryogenic_seal

   Clean, oxide-free indium will cold weld to itself. The mating ends of a wire seal will weld together under compression. [12] A more reliable alternative to a seal made from indium wire is a seal that uses an indium washer. Washers minimize the risk of seal degradation and cryogenic leaks by eliminating the interface between connected butt ends ...

4. Leak detection - Wikipedia

   en.wikipedia.org/wiki/Leak_detection

   Thermal camera system with video analysis software detecting an oil leak from a valve at 50 feet and 150 feet in heavy rain Externally based systems use local, dedicated sensors. [ 3 ] Such LDS are highly sensitive and accurate, but system cost and complexity of installation are usually very high; [ 17 ] applications are therefore limited to ...

5. Hermetic seal - Wikipedia

   en.wikipedia.org/wiki/Hermetic_seal

   Hermetic epoxy seals also offer the design flexibility of sealing either copper alloy wires or pins instead of the much less electrically conductive Kovar pin materials required in glass or ceramic hermetic seals. With a typical operating temperature range of −70 °C to +125 °C or 150 °C, epoxy hermetic seals are more limited in comparison ...

6. Glass-to-metal seal - Wikipedia

   en.wikipedia.org/wiki/Glass-to-metal_seal

   Uranium glass used as lead-in seals in a vacuum capacitor. Glass-to-metal seals are a type of mechanical seal which joins glass and metal surfaces. They are very important elements in the construction of vacuum tubes, electric discharge tubes, incandescent light bulbs, glass-encapsulated semiconductor diodes, reed switches, glass windows in metal cases, and metal or ceramic packages of ...

7. Seal (mechanical) - Wikipedia

   en.wikipedia.org/wiki/Seal_(mechanical)

   A seal is a device or material that helps join systems, mechanisms or other materials together by preventing leakage (e.g. in a pumping system), containing pressure, or excluding contamination. The effectiveness of a seal is dependent on adhesion in the case of sealants and compression in the case of gaskets .