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首都每年国庆节、五一国际劳动节,在游行的时候,晚间在天安门前狂欢的时候,我们都看到五光十色的焰火。这美丽的焰火是用什么东西制造出来的呢?焰火和我们通常放的爆竹相似,也是靠火药的爆炸把火药筒送到半空中,再在空中爆炸的。里面装的发射药,是一种黑色的混合火药,其中有木炭、硫磺,这些是可燃体;还有土硝(硝酸钾),是助燃体;助燃体还有氯酸钾,它能使光色更鲜艳。为什么它会发出五颜六色的光来呢,这是因为在火药里掺
Every year on the National Day of the Capital, May Day, we all witnessed colorful fireworks when we marched in front of Tiananmen Gate during the parade. The beautiful fireworks are made of something. The fireworks are similar to the firecrackers we usually put. They also send gunpowder cartridges to the air and explode in the air. The propellant contained inside is a black mixed gunpowder, which contains charcoal and sulphur. These are combustibles. There is also nitric acid (potassium nitrate), which is a combustion-supporting body. The combustion-supporting body also contains potassium chlorate, which can make light color more Brightly colored. Why does it emit colorful light? This is because it is mixed in gunpowder.