angappan - 9-6-2008 at 22:36
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
woelen - 9-6-2008 at 22:37
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.
jokull - 10-6-2008 at 11:11
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 674 times
Sauron - 11-6-2008 at 09:01
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.
Formatik - 11-6-2008 at 17:23
Sodium azide explodes when heated to a high temeprature, so you can get an explosion.
angappan - 11-6-2008 at 22:16
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.
Formatik - 12-6-2008 at 00:18
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.
Sauron - 12-6-2008 at 00:21
How would you seperate the aluminum nitride from sodium even if the reaction proceeded peacefully?
You would get some sodium aluminum compound for sure.