Cryogenic conditions are conditions where temperatures are low enough for gases to condense to become liquids or solids. For IFE capsules, deuterium and tritium can be frozen to solid, cryogenic form by the boiling of liquid helium.
Extremely low temperature chemicals that are capable of causing acute or long-term freeze burn damage to the body. Example - ammonia used to deep freeze products in the food packaging industry. Important because suit materials act differently in cold environments. They lose flexibility, often become brittle and show signs of stress cracking. Go to top
Greek krýos: cold, frost. Applied to gases cryogenic refers to low temperatures where the gases are in their liquid phase. For natural gas the boiling temperature (where the phase transition from liquid to gaseous occurs) is -161.5°C (111.5 K) and for hydrogen it is -253°C (20 K).
Very low temperature, associated with liquified gases such as liquid oxygen. While there is no universal standard as to what temperatures are considered cryogenic, many authorities accept the temperature range from -100 °C (-148 °F) and below as cryogenic. The term cryogenics, first noted about 1875, comes from the Greek words "KRYOS" (icy cold) and "GENES" (born).
Substances having temperatures below -150 degrees F (-101.1 degrees C). Materials, which exist at extremely low temperatures, such as nitrogen. Those gases that must be cooled to a very low temperature in order to bring about a change from a gas to a liquid.
Frozen at extremely low temperatures. The field of cryogenics is attempting to produce temperatures as close to absolute zero as possible. Absolute zero is the temperature at which molecules stop moving altogether.