Vince Pitelka on fri 11 jun 10
Eleanora Eden wrote
"A few years ago I bought a gallon of colloidal silica from this outfit:
REMET Corporation
301 Turner Street
Utica NY 13502
Contact: Ed or John
Phone: 315-797-1845
Scott Martin - Inside Sales
REMET Corporation
Phone: (800) 445-2424 ext 277
Fax: (315) 797-4848
smartin@remet.com
I have used it for mending jobs. This note below on clayart late '06 that
sent me looking for it. I used it mixed with EPK to glue kaoboard pieces
together."
Eleanora -
Colloidal silica is indeed amazing stuff. I do not know the chemistry of it=
,
but I was very impressed with its use in ceramic shell molds. At the
UMass-Amherst sculptor's foundry we did ceramic shell. The waxes were
coated with a layer of a slurry of colloidal silica and flint, dusted all
over with fine silica sand (which stuck to the slurry), coated with slurry
again, dusted with medium grog, coated with slurry, dusted with coarse grog=
,
coated with slurry, etc., until the overall coating was at least 1/2" thick=
.
When dry these molds could be placed in the crucible furnace, and the
forced-air burner cranked up all the way, which brought the interior of the
furnace to red heat almost instantly. This mixture does not shrink at all
in drying and firing, and did not crack at all from the instantaneous
heating. I'd be curious to experiment with mixtures of colloidal silica,
flint, and clay as a sculpture and refractory repair medium.
- Vince
Vince Pitelka
Appalachian Center for Craft
Tennessee Tech University
vpitelka@dtccom.net; wpitelka@tntech.edu
http://iweb.tntech.edu/wpitelka
Eleanora Eden on fri 11 jun 10
Hi Jonathan and all,
A few years ago I bought a gallon of colloidal silica from this outfit:
REMET Corporation
301 Turner Street
Utica NY 13502
Contact: Ed or John
Phone: 315-797-1845
Scott Martin - Inside Sales
REMET Corporation
Phone: (800) 445-2424 ext 277
Fax: (315) 797-4848
smartin@remet.com
I have used it for mending jobs. This note below on clayart late '06 that
sent me looking for it. I used it mixed with EPK to glue kaoboard pieces
together.
Best,
Eleanora
>Please note, you all! The most effective "RIGIDIZER" for any application
>using ceramic fiber is "collidial silica" which is produced through
>ionization of "sodium siclica" I have used clear
>liquid collidal silica for endless applications for more than 4 decades.
>For example, one of my electric kiln lids, started to crack. I simple
>applied collicial silica into the crack; after the next firing, Bingo! Th=
e
>lid is repaired totally, no more cracking or shifting movement of the kiln
lid. I could do an entire list of related applications.
>Tony,
>
>my understanding is the ITC is made up by mixing zirconia flour with
>colloidal silica. have you tried this yet? I have been looking to
>get ahold of some colloidal silica (fumed silica suspended in water)
>for making castable anyway. colloidal silica is supposed to be an
>excellent bonding and suspension agent and doesn't pose the same
>problems that portland cement does in castable formulas. my
>understanding is that the colloidal silica helps keep the ITC in
>suspension in addition to helping it bond before it is fired.
>
>best,
>jon byler
--
Bellows Falls Vermont
www.eleanoraeden.com
Daniel Rotblatt on sun 13 jun 10
I purchase from Remet often since i also do ceramic shell bronze
casting - good folks. A side note is that i combine it with zircon
flour to make a rigidizer/heat reflector for ceramic fiber. It is
much like ITC100.
Dan Rotblatt
On Jun 11, 2010, at 10:16 PM, Vince Pitelka wrote:
> Eleanora Eden wrote
> "A few years ago I bought a gallon of colloidal silica from this
> outfit:
> REMET Corporation
> 301 Turner Street
> Utica NY 13502
> Contact: Ed or John
> Phone: 315-797-1845
> Scott Martin - Inside Sales
> REMET Corporation
> Phone: (800) 445-2424 ext 277
> Fax: (315) 797-4848
> smartin@remet.com
> I have used it for mending jobs. This note below on clayart late
> '06 that
> sent me looking for it. I used it mixed with EPK to glue kaoboard
> pieces
> together."
>
> Eleanora -
> Colloidal silica is indeed amazing stuff. I do not know the
> chemistry of it,
> but I was very impressed with its use in ceramic shell molds. At the
> UMass-Amherst sculptor's foundry we did ceramic shell. The waxes were
> coated with a layer of a slurry of colloidal silica and flint,
> dusted all
> over with fine silica sand (which stuck to the slurry), coated with
> slurry
> again, dusted with medium grog, coated with slurry, dusted with
> coarse grog,
> coated with slurry, etc., until the overall coating was at least
> 1/2" thick.
> When dry these molds could be placed in the crucible furnace, and the
> forced-air burner cranked up all the way, which brought the
> interior of the
> furnace to red heat almost instantly. This mixture does not shrink
> at all
> in drying and firing, and did not crack at all from the instantaneous
> heating. I'd be curious to experiment with mixtures of colloidal
> silica,
> flint, and clay as a sculpture and refractory repair medium.
> - Vince
>
> Vince Pitelka
> Appalachian Center for Craft
> Tennessee Tech University
> vpitelka@dtccom.net; wpitelka@tntech.edu
> http://iweb.tntech.edu/wpitelka
jonathan byler on mon 14 jun 10
Vince, I think you can make colloidal silica by mixing fumed silica in
water. The particle size of the fumed silica has a lot to do with the
qualities of the final product. Remet and others make a variety of
different colloidal silica (and I think coloidal alumina) products for
various applications. it is a fabulous material and good for
replacing portland cement as a binder in castable refractory mixes.
there is a fair bit of literature out there on the web about it, but
it can be hard to sift though and get meaningful information for the
type of work that we are interested in. I have been thinking that if
my father (a fine research chemist) ever retires, I will try to put
him to work in his spare time trying to find answers (and explanations
that laymen can understand) to some of the questions I have about
colloidal silica and how it can be of use to studio pottery and other
allied arts.
-jon
On Jun 12, 2010, at 12:16 AM, Vince Pitelka wrote:
> Eleanora Eden wrote
> "A few years ago I bought a gallon of colloidal silica from this
> outfit:
> REMET Corporation
> 301 Turner Street
> Utica NY 13502
> Contact: Ed or John
> Phone: 315-797-1845
> Scott Martin - Inside Sales
> REMET Corporation
> Phone: (800) 445-2424 ext 277
> Fax: (315) 797-4848
> smartin@remet.com
> I have used it for mending jobs. This note below on clayart late
> '06 that
> sent me looking for it. I used it mixed with EPK to glue kaoboard
> pieces
> together."
>
> Eleanora -
> Colloidal silica is indeed amazing stuff. I do not know the
> chemistry of it,
> but I was very impressed with its use in ceramic shell molds. At the
> UMass-Amherst sculptor's foundry we did ceramic shell. The waxes were
> coated with a layer of a slurry of colloidal silica and flint,
> dusted all
> over with fine silica sand (which stuck to the slurry), coated with
> slurry
> again, dusted with medium grog, coated with slurry, dusted with
> coarse grog,
> coated with slurry, etc., until the overall coating was at least
> 1/2" thick.
> When dry these molds could be placed in the crucible furnace, and the
> forced-air burner cranked up all the way, which brought the interior
> of the
> furnace to red heat almost instantly. This mixture does not shrink
> at all
> in drying and firing, and did not crack at all from the instantaneous
> heating. I'd be curious to experiment with mixtures of colloidal
> silica,
> flint, and clay as a sculpture and refractory repair medium.
> - Vince
>
> Vince Pitelka
> Appalachian Center for Craft
> Tennessee Tech University
> vpitelka@dtccom.net; wpitelka@tntech.edu
> http://iweb.tntech.edu/wpitelka
Eleanora Eden on mon 14 jun 10
Hi Vince and all,
When I was at Remet I asked a lot of questions and this is indeed what
they were doing with it there at the plant. They were making high temp
molds for industry.
Eleanora
>Eleanora -
>Colloidal silica is indeed amazing stuff. I do not know the chemistry of i=
t,
>but I was very impressed with its use in ceramic shell molds. At the
>UMass-Amherst sculptor's foundry we did ceramic shell. The waxes were
>coated with a layer of a slurry of colloidal silica and flint, dusted all
>over with fine silica sand (which stuck to the slurry), coated with slurry
>again, dusted with medium grog, coated with slurry, dusted with coarse gro=
g,
>coated with slurry, etc., until the overall coating was at least 1/2" thic=
k.
>When dry these molds could be placed in the crucible furnace, and the
>forced-air burner cranked up all the way, which brought the interior of th=
e
>furnace to red heat almost instantly. This mixture does not shrink at all
>in drying and firing, and did not crack at all from the instantaneous
>heating. I'd be curious to experiment with mixtures of colloidal silica,
>flint, and clay as a sculpture and refractory repair medium.
>- Vince
>
>Vince Pitelka
>Appalachian Center for Craft
>Tennessee Tech University
>vpitelka@dtccom.net; wpitelka@tntech.edu
>http://iweb.tntech.edu/wpitelka
--
Bellows Falls Vermont
www.eleanoraeden.com
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