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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Lower flammable limit ： ウィキペディア英語版 Lower flammable limit Lower flammability limit (LFL),〔1. ASTM E681-04 http://www.astm.org/Standards/E681.htm〕 usually expressed in volume per cent, is the lower end of the concentration range over which a flammable mixture of gas or vapour in air can be ignited at a given temperature and pressure. The flammability range is delineated by the upper and lower flammability limits. Outside this range of air/vapor mixtures, the mixture can not be ignited (unless the temperature and pressure are increased). The LFL decreases with increasing temperature; thus, a mixture that is below its LFL at a given temperature may be ignitable if heated sufficiently. For liquids, the LFL is typically close to the saturated vapor concentration at the flash point, however, due to differences in the liquid properties, the relationship of LFL to flash point (which is also dependent on the test apparatus) is not fixed and some spread in the data usually exists. The $LFL\_$ of a mixture can be evaluated using the Le Chatelier mixing rule, if the $LFL\_$ of the components $i$ are known:〔Le Chatelier, H. Notes sur le dosage du grisou par les limites d’inflammabilité. Ann. Mines 388–395 (1891).〕 $LFL\_=\backslash frac\}\}$ Where $LFL\_$ is the lower flammability of the mixture, $LFL\_$ is the lower flammability of the $i$-th component of the mixture, and $x\_$ is the molar fraction of the $i$-th component of the mixture. ==See also== *Flammability limit *Flammability *Flash point *Minimum Ignition Energy *Petroleum *Stoichiometry *Upper flammable limit 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Lower flammable limit」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.