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Terra cotta stove

Gray Simpson


Joined: Jan 12, 2012
Posts: 67
Location: McDonough, GA
My art class is doing a unit on ceramics. We are working with terra cotta, the kind of clay that turns flower-pot-orange when fired. I want to make a couple of sculptures that are functional as well as decorative.

One of the first things that came to mind was to build a small, one-piece rocket stove. It must be no more than 8 inches (20cm) tall, probably more like 6 inches (15cm).

I'm figuring that the chimney will taper to 2.5 inches (6.3cm) wide. The thickness of the clay would be about 0.5 inches (1.2cm).

Another idea I have is to make a small botijo (an unglazed bottle that cools water by evaporation). What thickness should I use to let the water evaporate without dripping out too fast? Could the terracotta have anything toxic in it? Would mold be an issue with moist, unglazed terracotta?

Does anyone have experience with terra cotta? I'd appreciate any ideas!
Ernie Wisner
volunteer

Joined: Oct 16, 2009
Posts: 788
Location: Tonasket washington
    
  23
Gray a small pocket rocket would be cool.

could you post the firing temps for terracotta tiles? Maybe ask your instructor if you can make a roof tile and let folks here know whats involved


Need more info?
Ernie and Erica
Wood burning stoves, Rocket Mass Heaters, DIY,
Stove plans, Boat plans, General permiculture information, Arts and crafts, Fire science, Find it at www.ernieanderica.info


Gray Simpson


Joined: Jan 12, 2012
Posts: 67
Location: McDonough, GA
I have the stove sculpted and sitting out to dry. It's similar to this design http://www.permies.com/t/13198/stoves/Dave-Microforge

It's meant to burn isopropyl alcohol with nut shells as a wick. I wish I could make something bigger to burn wood, but our class doesn't get to use the potter's wheel. I'll ask about the temperature but I'm not going to make any tiles. Hopefully this summer I'll try making and firing my own clay
Ernie Wisner
volunteer

Joined: Oct 16, 2009
Posts: 788
Location: Tonasket washington
    
  23
Works for me. the temps would be good things to get. currently i believe the temp is 1200 degrees for terracotta. our ovens will hit that easy and hold it for some time. (might burn the insulated door up if its not made well enough.)
thanks in advance for the temps and cone information.
Gray Simpson


Joined: Jan 12, 2012
Posts: 67
Location: McDonough, GA
He said 1200 to 1300 degrees (not sure if that's C or F). He uses an electric kiln that shuts off at cone 50 aka cone 05.
 
 
subject: Terra cotta stove
 
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