[Home][2013 Index] Re: [TCML] Tungsten Electrode Dust [Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: [TCML] Tungsten Electrode Dust



Hi,
I've never seen this sort of arc over either, but looking at it purely from
a chemistry viewpoint, the dust is partially conductive.  It is a rather
complex mix of four compounds + intermediates formed when tungsten is heated
in air.  The resulting four primary oxidation products are:

Brown colored tungsten nitride which is conductive
Copper/bronze colored tungsten (IV) oxide, which is highly conductive
Yellow colored tungsten (VI) oxide, which is not conductive (used as a
yellow pigment, WO3)
Blue colored tungsten pentoxide, which is not listed anywhere I have seen as
been conductive, however this one has quite a complicated structure, so I am
not sure about it.

Tungsten (III) oxide is also known but not formed from this process.

Mix these together and you end up with a greyish white powder which is
partially conductive.

Ian

-----Original Message-----
From: tesla-bounces@xxxxxxxxxx [mailto:tesla-bounces@xxxxxxxxxx] On Behalf
Of Phil Tuck
Sent: Sunday, 10 November 2013 3:28 AM
To: tesla@xxxxxxxxxx
Subject: [TCML] Tungsten Electrode Dust


All,
Does anyone know for fact if the fine white dust that you find around a
rotary spark gap, from the ablation of the electrodes, is actually
conductive? One supposes it is, but logic and reality can be differant.
Regards
Phil T

www.hvtesla.com


_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla

_______________________________________________
Tesla mailing list
Tesla@xxxxxxxxxx
http://www.pupman.com/mailman/listinfo/tesla