iandol on sat 13 oct 01
Dear John Weber,
It would be difficult to postulate a theory for this in an electric kiln =
situation and a neutral atmosphere. In a firing with carbonaceous fuel =
and reduction at high temperature, that is above 1050 Celsius, steam =
reacts with free carbon to create Hydrogen and Carbon monoxide. Burnt =
with secondary air both of these gases have flame temperatures upwards =
of 2000 Celsius (~3600 F). Playing on a glaze designed to fuse at 1200 =
or so, I would expect melting.
Best regards,
Ivor Lewis.
Paul Taylor on wed 17 oct 01
Dear ivor
Am I right in thinking that even though the water does react to form
hydrogen and carbon, That there must be a net loss in temperature by adding
water . otherwise There would be not much point in fireman putting water on
a fire. As a fireman we put fires out that were burning this hot. And we
would not need nuclear fuel we could just heat up a furnace to 1500 c and
use water.
--
Do not take anything for granted especially the accuracy of my posts.
Regards Paul Taylor
> From: iandol
> Reply-To: Ceramic Arts Discussion List
> Date: Sat, 13 Oct 2001 16:34:07 +0930
> To: CLAYART@LSV.CERAMICS.ORG
> Subject: Re: shiny vs matt glaze question. Influence of water vapour
>
> Dear John Weber,
>
> It would be difficult to postulate a theory for this in an electric kiln
> situation and a neutral atmosphere. In a firing with carbonaceous fuel and
> reduction at high temperature, that is above 1050 Celsius, steam reacts with
> free carbon to create Hydrogen and Carbon monoxide. Burnt with secondary air
> both of these gases have flame temperatures upwards of 2000 Celsius (~3600 F).
> Playing on a glaze designed to fuse at 1200 or so, I would expect melting.
>
> Best regards,
>
> Ivor Lewis.
>
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