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没有火焰的缓慢燃烧现象称为阴燃。很多固体物质,如纸张、锯末、橡胶、海绵以及某些多孔热固性塑料等,都可能发生阴燃,特别是当它们堆积起来的时候。阴燃是固体燃烧的一种形式,是无可见光的缓慢燃烧,通常会产生烟和温度上升等现象。发生阴燃的内部条件是,可燃物必须是受热分解后能产生刚性结构的多孔的固体物质。例如,柔性泡沫材料如果在高温条件下产生刚性很强的碳就会容易发生阴燃。发生阴燃的外部条件是有适合供热强度的
The slow burning without flame is called smoldering. Many solid substances, such as paper, sawdust, rubber, sponges, and some porous thermosets, can smolder, especially when they pile up. Smoldering is a form of solid combustion, slow combustion without visible light, and usually produces smoke and temperature rise. The internal condition in which smoldering occurs is that the combustible material must be a porous, solid material that produces a rigid structure upon thermal decomposition. For example, flexible foam tends to smolder if it produces highly rigid carbon under high temperature conditions. The smoldering external conditions are suitable for heating intensity