Can someone clarify this for me?
Firstly you are arguing with a truther and he is bound to be wrong somewhere. Lets see.
Yep he thinks that Aluminium oxide is used in thermite. Lets look at the
classical thermite reaction
2Fe
2O
3 + 2Al --> 2Fe + Al
2O
3
Ooops - Aluminium oxide is a product of the reaction, NOT a reactant, so
Al2O3 (Aluminium oxide) is NOT used in thermite.
So you now know that this truther, like most other truthers, knows nothing about thermite or chemistry. I'd just give up now, he'll be impossible to educate.....or
Play with him and ask him to write the classic thermite chemical equation. He won't be able to. Then supply the equation and ask him which strange scribles are the ingredients for thermite. He'll probably go into convulsions. Point that out to him and then ask him where Al
2O
3 comes in.
However, a themite reaction, is simply one where a reaction occurs between a metal oxide and a more reactive metal. See reactivity series of metals (which is taught around the age of 13 in the UK) -
http://www.tutorvista.com/content/science/science-ii/metals-non-metals/reconcept-series-metals.php
http://sbhschemistry.wikispaces.com/2.7+Redox+Chemistry
The addition of Barium Nitrite and Sulphur to thermite reduces the ignition temperature required to get the reaction started and secondly aids in producing flames because thermite is an incendiary and not an explosive. When these additions are used then the thermite becomes thermate and you'll often see debunkers write therm*te to cover both because truthers will switch between the two without understanding the subtle difference.
So yes he managed to read part of wiki correctly. Thermite by definition doesn't contain Barium Nitrate or Sulphur.
If a truther believes the thermite nonsense they are invariably talking about the classical thermite reaction and not one using other metals and oxides.
http://amazingrust.com/experiments/how_to/thermite.html
Truthers believe that thermite can be multiple things all at once - they often wrongly refer to it as an explosive. They'll put the word "nano" infront without understanding what nano means in the context of thermite. Nano to truthers means super-duper can do anything in the world because they think nano-tech(nology) is some sort of magic. If they put the word super in front of that to make "super nano-thermite" then your screwed. Super nano-thermite is the worlds most fantastic material according to truthers and can be an explosive, an incendiary, a rocket propellant, it will make "teh molten steelz!!!111!!" even if there are only tiny chips a maximum of 3mm across and 40 microns thick scattered randomly in the WTC dust, needing only 20µm (microns) thickness [human hair thickness is 100µm] to melt an inch thick beam, will burn for 100 days (even though the youtube vid they just posted proves otherwise) etc, etc, ad youtubium.
There are plenty of threads on JREF about the thermite nonsense.