angappan
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sodium azide
Hi,
What will be reaction of Sodium azide with aluminium metal powder heating in a furnace to 1000 C? Any exposion would be possible?
S.Angappan
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woelen
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Well before that temperature of 1000 C is reached, the sodium azide will have decomposed (possibly explosively). The Al and remaing Na might react,
making an alloy, but I'm not sure about that.
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jokull
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This are some facts I know about sodium azide:
When heated from 275 to 330°C in dry air, the solid crystals decompose evolutioning nitrogen and a residue of sodium oxide. If air is humid then you
get sodium hydroxide.
Aluminum is also easy to oxidize, so I think you may find useful the phase diagram for full system including sodium, aluminum and their oxides.
Here you are:
Attachment: Al-Na phase diagram.wmf (4kB)
This file has been downloaded 671 times
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Sauron
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And suppose the thermal decomposition of NaN3 is conducted in an inert atmosphere or in a vacuum, absent moisture?
2 NaN3 -> 2 Na + 3 N2
The vacuum would be preferable, as the reaction might tend to reverse if N2 is allowed to linger.
Not a very economical way to make sodium is it?
The Na will be liquid, I am not sure what its vapor pressure is.
Sic gorgeamus a los subjectatus nunc.
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Formatik
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Sodium azide explodes when heated to a high temeprature, so you can get an explosion.
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angappan
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Dear,
My aim is to prepare aluminium nitride, by aluminium metal powder and sodium azide with or without nitrogen gas? Kindly reply on this line.
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Formatik
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Isn't this described in US Patent 7217403, European patent 691943, etc? But they also use a diluent (e.g. SiO2, ZrO2, etc). For patent images see espacenet or USPTO.
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Sauron
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How would you seperate the aluminum nitride from sodium even if the reaction proceeded peacefully?
You would get some sodium aluminum compound for sure.
Sic gorgeamus a los subjectatus nunc.
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