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Thermate -- Could I replace Iron Oxide with Calcium Oxide? Answered

Hi, I'm making a flashbang that's part Thermate using Tetranitrate's Thermite Instructable* and I would like to know if I would be able to replace the iron oxide in the mixture with calcium oxide for a bit of added white. The flashbang is inteaded to be (temporarily) blinding.

Thanks,
BlueGasMask

* www.instructables.com/id/Thermite/

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0
Prfesser
Prfesser

Best Answer 10 years ago

Afraid not.  Thermite requires that the metal in the oxide be significantly less active (have a more negative standard reduction potential) than the pure metal component.  Aluminum is more active than iron, so iron oxide will work, as will many transition metal oxides.  But calcium is *more* active than aluminum, so calcium oxide with aluminum will not work.

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Jack A Lopez
Jack A Lopez

Answer 10 years ago

+1  Ellingham diagrams are also helpful, when trying to pick a metal to reduce a different metal oxide.

ellingham_Diagrams.jpg
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Re-design
Re-design

10 years ago

Is "Thermate" the Australian version of "Thermite"?

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lemonie
lemonie

10 years ago

No.
If you're following something that someone else has done, do it that way. On the Pauling scale Calcium is way out for thermite, but if you want white (and cornea-burning-UV) it's magnesium-metal you want. Sodium-chlorate weed-killer will give a good yellow and a spray of salt...

L