Dewar flask

Related Overviews


James Dewar (1842—1923) chemist and physicist


More Like This

Show all results sharing this subject:

  • Chemistry


Show Summary Details

Quick Reference

A vessel for storing hot or cold liquids so that they maintain their temperature independently of the surroundings. Heat transfer to the surroundings is reduced to a minimum: the walls of the vessel consist of two thin layers of glass (or, in large vessels, steel) separated by a vacuum to reduce conduction and convection; the inner surface of a glass vessel is silvered to reduce radiation; and the vessel is stoppered to prevent evaporation. It was devised around 1872 by Sir James Dewar and is also known by its first trade name Thermos flask. See also cryostat.

Subjects: Chemistry.

Reference entries

Users without a subscription are not able to see the full content. Please, subscribe or login to access all content.