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ferrocerium
Ferrocerium is a man-made metallic material that produces hot sparks at temperatures of about when scraped against a rough surface (pyrophoricity), such as ridged steel. Because of this property it is used in many applications, such as clockwork toys, strikers for gas welding and cutting torches, so-called "flint-and-steel" or "flint spark lighter" fire-starters in emergency survival kits and cigarette lighters, as the initial ignition source for the primary fuel.〔Klaus Reinhardt and Herwig Winkler in "Cerium Mischmetal, Cerium Alloys, and Cerium Compounds" in Ullmann's Encyclopedia of Industrial Chemistry 2000, Wiley-VCH, Weinheim. 〕 It is also commonly called ferro rod and most commonly of all, flint (particularly in cigarette lighters).
== Use ==
While ferrocerium-and-steels function in a similar way to natural flint-and-steel in fire starting, ferrocerium takes on the role that steel played in traditional methods: when small shavings of it are removed quickly enough the heat generated by friction is enough to ignite those shavings, converting the metal to the oxide, i.e., the sparks are tiny pieces of burning metal. The sparking is due to cerium's low ignition temperature of between . About 700 tons were produced in 2000.
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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