Flint
A flint (also known as flint ) is a pyrophoric material that forms sparks when mechanical energy is supplied . Flints are mostly used in the form of small sticks with a diameter of 2 mm and a length of 5–10 mm in lighters , gas lighters and sparking toys.
Mode of action
Small splinters are scraped off by mechanical friction on the surface of a flint. These are heated by the energy supplied by friction. At the same time, the formation of splinters creates a comparatively large surface, which means that the material can react quickly with the oxygen in the ambient air. The oxidation releases further energy, so that sufficiently high temperatures are reached to set flammable substances on fire. If the temperatures are sufficient to make the splinters visibly glow, one speaks of spark formation .
In the commonly used Auermetal , cerium and iron react with the oxygen in the air .
Since flints are subject to wear due to their mode of action, igniters based on piezoelectric technology are used in gas heaters and stoves, see piezo lighter .
- Flints with original packaging
Flints
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Lighter flints
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