Paul Lewing on mon 26 mar 07
Late Friday afternoon at NCECA somebody told me they'd seen a gizmo
in one of the booths (I think they said it was the Spectrum booth)
that you could put in your microwave and it would heat up to 1800
degrees in a few minutes. Was this a fantasy on this person's part,
or was there really such a thing? I never made it over there to
check it out.
Paul Lewing
www.paullewingtile.com
Thomas Malone on tue 27 mar 07
Hello Paul,
Could you mean Microwave Assisted Gas Firing? Have a look at
http://www.azom.com/details.asp?ArticleID=1565
Arnold Howard on tue 27 mar 07
From: "Paul Lewing"
> Late Friday afternoon at NCECA somebody told me they'd
> seen a gizmo
> in one of the booths (I think they said it was the
> Spectrum booth)
> that you could put in your microwave and it would heat up
> to 1800
> degrees in a few minutes.
The "microwave kiln" was introduced around 1991 and was
popular for glass-fused jewelry.
Sincerely,
Arnold Howard
Paragon Industries, L.P., Mesquite, Texas USA
ahoward@paragonweb.com / www.paragonweb.com
claystevslat on tue 27 mar 07
Paul --
I saw it, and I saw it demoed. It's some kind of grid-type
material that creates an enclosure mounted inside of a
separate material that provides the heat insulation.
The interior grid responds to the microwave and creates
the heat, which is then trapped in the insulation, etc.
I had very little time to discuss it with the guy, but
he did successfully decorate/glaze a 1 in by 1 in tile
and microwave it to a glassy finish while I waited.
The booth had various glazes and some kind of pen-type
glaze applicator, but I can't remember the company name.
-- Steve S
--- In clayart@yahoogroups.com, Paul Lewing wrote:
>
> Late Friday afternoon at NCECA somebody told me they'd seen a gizmo
> in one of the booths (I think they said it was the Spectrum booth)
> that you could put in your microwave and it would heat up to 1800
> degrees in a few minutes. Was this a fantasy on this person's
part,
> or was there really such a thing? I never made it over there to
> check it out.
> Paul Lewing
Cindy Bracker on tue 27 mar 07
Hi Paul,
It is no halucination. Richard from Spectrum is importing then from
Japan (I think). It's pretty slick. Only does small pieces, but I
actually saw the thing work. Soft bisque in about 4 minutes.
Spectrum has designed a line of "superwriter pens" that fire to this
temperature. ( http://www.spectrumglazes.com/ss_1.html ) The small
one retails for $99.00, the larger one $135.00 I didn't see the kiln
itself up on their website, but I have a flyer here. I can scan it
in and e-mail it to you if you like. Contact me off-list
Cindy
Cindy Bracker Sturm
Bracker's Good Earth Clays, Inc.
888-822-1982
http://www.brackers.com
On Mar 27, 2007, at 9:34 AM, clayart@yahoogroups.com wrote:
> microwave kiln thingy
>
> Posted by: "Paul Lewing" pjlewing@COMCAST.NET
>
> Tue Mar 27, 2007 5:23 am (PST)
>
> Late Friday afternoon at NCECA somebody told me they'd seen a gizmo
> in one of the booths (I think they said it was the Spectrum booth)
> that you could put in your microwave and it would heat up to 1800
> degrees in a few minutes. Was this a fantasy on this person's part,
> or was there really such a thing? I never made it over there to
> check it out.
> Paul Lewing
> www.paullewingtile.com
Lee Love on wed 28 mar 07
On 3/27/07, Paul Lewing wrote:
> Late Friday afternoon at NCECA somebody told me they'd seen a gizmo
> in one of the booths (I think they said it was the Spectrum booth)
> that you could put in your microwave and it would heat up to 1800
> degrees in a few minutes.
Maybe it was this crafter's item:
http://cgi.ebay.com/Microwave-Kiln-Art-Box-Mini-Glass-Art-Clay-Silver_W0QQitemZ170093061664
--
Lee in Mashiko, Japan
Minneapolis, Minnesota USA
http://potters.blogspot.com/
"To affect the quality of the day, that is the highest of arts." -
Henry David Thoreau
"Let the beauty we love be what we do." - Rumi
Lee Love on wed 28 mar 07
"Real" microwave kilns are available here in Japan:
http://www.takasago-inc.co.jp/eg/mw/mwave1.htm
They save energy, because you are heating the objects in the
kiln directly, rather than having to heat the kiln too.
They also come in microwave/lpg hybrid setups.
--
Lee in Mashiko, Japan
Minneapolis, Minnesota USA
http://potters.blogspot.com/
"To affect the quality of the day, that is the highest of arts." -
Henry David Thoreau
"Let the beauty we love be what we do." - Rumi
Mark Tigges on wed 28 mar 07
On Wed, Mar 28, 2007 at 08:04:43AM +0900, Lee Love wrote:
> "Real" microwave kilns are available here in Japan:
>
> http://www.takasago-inc.co.jp/eg/mw/mwave1.htm
>
> They save energy, because you are heating the objects in the
> kiln directly, rather than having to heat the kiln too.
>
> They also come in microwave/lpg hybrid setups.
I am not positive it's more efficient. That's 1 cf with 4.5kw at 200V
not favourable to resistance heated kilns, but at least it's more
durable to cone 10 (or cone 16 if you're so inclined).
I had a co-worker translate the page on the panasonic countertop
microwave kiln. IIRC the kiln was about 1.5 cf and 9000 watts on 220
volts. Not favourable compared to resistance heated kilns.
The interesting thing about using microwaves to power a pottery kiln
is that you have to have something in the kiln which is polar to
absorb the microwaves. I believe silcon carbide is the only suitable
solid for this application. Then you have to make the chamber an
appropriate size for resonation.
This way the walls get lined with silicon carbide, they heat up by
absorbing the energy produced by the magnetron. They heat the volume
of the kiln by radiation. Obviously you would want IFB to insulate
the whole deal.
Lastly you need to have a grill over the peephole to try and keep the
energy in. And you'd probably want to turn the magnetron off while
you're looking at cones.
I thought about trying to build a small microwave kiln the last time
this link got posted. One could easily salvage a magnetron from a
used oven. The reason I think it's interesting is since you have to
make a metal box for it anyways, why not try to make it sealed? That
way you could pipe in beer gas (50% CO2 and 50% N2) slowly to displace
the O2 for reduction. Or maybe argon. But then peeping the cones
gets quite difficult. I'm not sure if this method of reduction would
be more efficient, and obviously carbon trapping wouldn't happen.
Just one of those things that I'd like to try for no other reason than
just because.
If you REALLY want to try this microwave oven insert ... just get some
used IFB make an enclosure and put a kiln shelf fragment in there with
some pyrometric cones for glass slumping temps. See what happens.
Interested reading:
http://home.c2i.net/metaphor/mvpage.html
Mark.
--
http://www.m2crafts.ca
m2crafts [at] gmail
Donald Burroughs on wed 28 mar 07
Hello Paul
Here it is. Not much there except a photo
http://panasonic.co.jp/pscdd/en/product/microwave/index.html and here
http://panasonic.co.jp/pscdd/en/company/field/microwave.html and also
http://www.mse.vt.edu/microwaves/Microwave Solutions for Engineers
Introduction.pdf
Donald Burroughs
PS Really like your murals. Would like to learn more about your processes.
William & Susan Schran User on thu 29 mar 07
On 3/28/07 7:55 PM, "Lee Love" wrote:
> Great for playing around with or for crafters. But they are
> actually using microwave kilns here already. Furuki has one of the
> Panasonics at his studio.
Lee,
Can you provide a link or URL that shows the microwave kiln along with more
detailed information?
Thanks, Bill
--
William "Bill" Schran
wschran@cox.net
wschran@nvcc.edu
http://www.creativecreekartisans.com
Lee Love on thu 29 mar 07
On 3/29/07, William & Susan Schran User wrote:
> Lee,
> Can you provide a link or URL that shows the microwave kiln along with more
> detailed information?
I already gave the links I know of. Don's links show Furuki's kiln:
http://panasonic.co.jp/pscdd/en/product/microwave/index.html
http://panasonic.co.jp/pscdd/en/company/field/microwave.html
--
Lee in Mashiko, Japan
Minneapolis, Minnesota USA
http://potters.blogspot.com/
"To affect the quality of the day, that is the highest of arts." -
Henry David Thoreau
"Let the beauty we love be what we do." - Rumi
Lee Love on thu 29 mar 07
On 3/29/07, Mark Tigges wrote:
> I am not positive it's more efficient. That's 1 cf with 4.5kw at 200V
> not favourable to resistance heated kilns, but at least it's more
> durable to cone 10 (or cone 16 if you're so inclined).
What you are not taking into account is the fact that you don't have
to heat the kiln, only the objects in the kiln. It is about 4 times
more efficient. You can hit temp in just a couple hours.
> If you REALLY want to try this microwave oven insert ... just get some
> used IFB make an enclosure and put a kiln shelf fragment in there with
Great for playing around with or for crafters. But they are
actually using microwave kilns here already. Furuki has one of the
Panasonics at his studio.
--
Lee in Mashiko, Japan
Minneapolis, Minnesota USA
http://potters.blogspot.com/
"To affect the quality of the day, that is the highest of arts." -
Henry David Thoreau
"Let the beauty we love be what we do." - Rumi
Dawn Kleinman on tue 3 apr 07
On Thu, 29 Mar 2007 23:22:39 +0900, Lee Love wrote:
>On 3/29/07, William & Susan Schran User wrote:
>
>> Lee,
>> Can you provide a link or URL that shows the microwave kiln along with
more
>> detailed information?
>
>I already gave the links I know of. Don's links show Furuki's kiln:
>
>http://panasonic.co.jp/pscdd/en/product/microwave/index.html
>http://panasonic.co.jp/pscdd/en/company/field/microwave.html
>--
>Lee in Mashiko, Japan
>Minneapolis, Minnesota USA
>http://potters.blogspot.com/
>
>"To affect the quality of the day, that is the highest of arts." -
>Henry David Thoreau
>
>"Let the beauty we love be what we do." - Rumi
>
>__________________________________________________________________________
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melpots@pclink.com.
That's interesting. How much do you think one of those things is?
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