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用摄影和热点偶等方法在一个有磨削轮的容器中研究了机械摩擦火花和热表面的引燃能力。在本研究中发现，对于某些材料，如碳钢等，由摩擦产生的磨屑可以被周围空气中的氧氧化而释放出大量的热，从而使屑粒温度升高，达到白热程度。通常我们把一簇这样的颗粒叫做“摩擦火花”。即使是不可氧化的摩擦材料，在摩擦中也可变热，但在可能形成热表面的同时，颗粒只能达到红热程度。研究表明，温度可能是决定引燃的最重要的因素。一般说来，火花的引燃能力要高于热表面。
The gliding ability of mechanical friction sparks and hot surfaces was studied in a container with a grinding wheel using methods such as photography and hotspot. In this study, it was found that for some materials, such as carbon steel, the abrasive debris generated by the friction can be oxidized by the oxygen in the surrounding air to release a large amount of heat, so that the temperature of the crumbs rises to a degree of white heat. Usually we call a cluster of such particles “frictional sparks.” Even a non-oxidizable friction material can be hot in friction, but at the same time hot surfaces may be formed, the particles can only reach red heat. Research shows that temperature may be the most important factor in determining ignition. In general, the ignition of sparks is higher than that of hot surfaces.