The small sparks are not actually open flames, but red-hot solid particles. Due to heat generation by friction, the red-hot solid particles are not as low as expected, at least for the liquefied vapor released from the flammable lighter. indicate. It is therefore normal for lighters to catch fire.
This can be caused by static electricity.
A lighter is a very practical lighting tool. Just press it with your finger, a few sparks will burst with a "click" and a "small lamp" inside will light up immediately. . What ignites the spark is the flint in the lighter, which is an alloy made up of metals such as cerium, lanthanum and iron. Cerium and lanthanum are both highly flammable metals. Cerium burns in dry oxygen at 320°C. When you use the wheel of the lighter to strike and rub the flint, oneOn the one hand it will be heated by friction, and on the other hand a little cerium and lanthanum powder will be erased from the flint, which will immediately burn and sparks will burst. .