DeBorah Goletz on fri 18 jun 10
Has anyone used the solid tube-shaped silicon carbide posts from
Euclid's? They're 1.75" diameter and come in various heights. I'm
wondering if 10" posts will warp in wood/salt. I've had trouble
finding suitable posts for the front of my train kiln - several have
warped and caused the front shelves to fall forward.
DeBorah Goletz
ivor and olive lewis on sun 20 jun 10
Dear DeBorah Goletz,
You ask <<. I'm wondering if 10" (Silicon Carbide posts will warp in
wood/salt. >>
In my experience of gas firing using Salt, Sodium Chloride, with Silicon
Carbide Shelves is that there will be corrosion of the Silicon Carbide.
Without a protective coating and at high temperatures this could be severe.
This is supported by information in L.A.Lay, "Corrosion Resistance of
Technical Ceramics", National Physical Laboratory. ISBN 0-11-480051-0. who
reports severe corrosion with fused alkali carbonates, Hydroxides and
Halogen Salts as low as 500 deg C
Best regards,
Ivor Lewis,
REDHILL,
South Australia
gary navarre on sun 20 jun 10
DeBorah,=3D20
I'm curious as to what you used for tall posts near the throat arch. Last =
=3D
year I decided to go the expense and ordered a couple hundred soaps, standa=
=3D
rd 9" firebrick cut lengthwise, from my brick guy and have gone to ^13 in f=
=3D
ront with no problem twice. I can easily cut one in half, set the smooth si=
=3D
des together, wad the top for level and get a 14" space. However, I found i=
=3D
t might be better to load the front with shorter shelves and a tighter sett=
=3D
ing to make my flame go up to the crown. Since I have so many extra soaps I=
=3D
'm thinking of filling in along the front shelves with extra posts to act a=
=3D
s a bag wall and force the flame up along the top of the chamber instead of=
=3D
doing all its work on a few pieces up front and flying along the floor out=
=3D
the stack. I would imagine post for post in small quantities silicon carbi=
=3D
de would be more expensive. I did find out I can get brick cheaper from the=
=3D
hardware store in Norway because he gets them from my first brick
guy so if I need more I know better now.
Gary Navarre
Navarre Pottery
Navarre Enterprises
Norway, Michigan, USA
http://www.youtube.com/GindaUP
http://public.fotki.com/GindaUP/
--- On Fri, 6/18/10, DeBorah Goletz wrote:
> From: DeBorah Goletz
> Subject: [Clayart] Silicon Carbide Post question
> To: Clayart@LSV.CERAMICS.ORG
> Date: Friday, June 18, 2010, 9:48 PM
> Has anyone used the solid tube-shaped
> silicon carbide posts from
> Euclid's?=3DA0 They're 1.75" diameter and come in various
> heights.=3DA0 I'm
> wondering if 10" posts will warp in wood/salt. I've had
> trouble
> finding suitable posts for the front of my train kiln -
> several have
> warped and caused the front shelves to fall forward.
>=3D20
> DeBorah Goletz
> =3D0A=3D0A=3D0A
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