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Two Thermites

Two thermite compositions. Both are 40g manganese dioxide thermites, mixed at a ratio of 2.42:1 MnO2:Al powder. To one batch, I added 5g of potassium permanganate to try to increase the manganese metal yield, bringing that to 45g total. The thermite reacts via 3MnO2 + 4Al = 2Al2O3 + 3Mn The audio is a little out of synch at the beginning. I didn't like my original narration, so I recorded over it. My ignition method for all my thermites is to use a small pile of KMnO4 on top of the thermite, with a strip of magnesium ribbon stuck down through that so it extends into the thermite. This is lit by adding a few drops of glycerin. This method is very reliable. I've found that magnesium alone is very difficult to use, as it tends to fragment and go out before reaching the thermite, and permanganate alone doesn't seem to be hot enough to do the trick. In the end, I actually was unable to gather any manganese from the second thermite. While it may have increased the yield, it also increased the violence of the reaction and this most likely blew most of the products out of the pot. More reactive thermites are tricky to get pure metals from, as they tend to blow most of the products away before they can congeal into large pieces. By contrast, iron oxide thermite always produces at least one good lump of metal, because the reaction is less vigorous and iron is a heavier metal. Please subscribe and comment!