Spark (fire)

In pyrotechnics, charcoal, iron filings, aluminum, titanium and metal alloys such as magnalium may be used to create sparks.

These sparks switch between surface and vapor phase combustion and accordingly between orange (black body) and green (element specific) emission.

[4] The color-change is based on the medium-ranged boiling point of erbium, which burns only partly in the vapor phase.

A spinning steel wheel provided a good stream of sparks when it engaged the flint, and a tinderbox designed to do this was known as a mill.

[10] In a modern lighter or firesteel, iron is mixed with cerium and other rare earths to form the alloy ferrocerium.

To reduce the risk of burns, welders wear heavy leather gloves and long sleeve jackets to avoid exposure to extreme heat, flames, and sparks.

In spot welding, metal surfaces that are held in contact are joined by the heat from resistance to electric current flow.

This was a great problem with steam locomotives as the sparks might set fire to the adjacent landscape or even to the train itself, especially if the engine burned wood rather than coal.

For example, a trail bike might be fitted with a centrifugal arrestor, which will trap glowing hot pieces of soot.

[18] Hasidic philosophy contains a doctrine of holy sparks (nitzotzot) from the kabbalism of Isaac Luria in which there is a duty to gather the sundered light of creation.

[20] The sparks of fire are identified by some translators as the sons of Resheph - a Canaanite deity of lightning and pestilence.