Ceramic Firing Temperature

You cannot fire pottery in a home oven because ovens do not get up to the high temperatures of more than 1 500 degrees fahrenheit that you need for firing clay.

Ceramic firing temperature.

As the temper ature in a kiln rises many changes take place at different temperatures and understanding what happens during the firng can help you avoid problems with a variety of clay and glaze faults related to firing. Low fire mid range and high fire ranges. A body glaze layer that forms between the clay body and glaze. Cone temperature conversion chart.

If fired at too low a temperature the glaze will not mature. People want to know if they can fire a certain clay to a certain cone. When potters talk about ceramic firing ranges they are usually referring to the three most common. Firing temperatures cone equivalents showing various clays and glazes mid range stoneware porcelain clays mature vashon clays crystal white dove alpine white etc.

The ware is returned to the kiln for a very low temperature firing in order to fuse the overglazes. Stoneware glaze some decals fire to cone 10. Cone 10 13 range 2381 2455 f 1305 1346 c. Clay bodies have ranges of temperature that they can be fired to.

This is the hardening tightening and finally the partial glassification of the clay. A common temperature range for industrial ceramics. The glass phase that forms during the firing of a ceramic material can be thought of as the glue that holds the finished work together. If the temperature goes too high the glaze will become too melted and run off the surface of the pottery.

Firing converts ceramic work from weak greenware into a strong durable permanent form. Each ceramic glaze should be fired to a specific temperature range. Mid fire earthenware should be fired between cone 2 and cone 7. This is the most common temperature range for industrial ceramics.

And a body clay with underglaze yellow orange to light yellow from this point up low fire clays will start to melt damaging shelves and other pots low fire clays mature. Very high fire porcelain. For mid range material a kiln should be firing at a temperature between 2124 and 2264 1162 1240. Mostly yellow with a hint of orange.

Ware and glaze types. We get many questions about clay firing temperatures. The fancy name for this is vitrification or the ceramic chemistry that transforms a clay body into a hard non crystalline glass. Average is cone 10 2381 f 1305 c cone 8 12 range 2305 22419 f 1263 1326 c a hard vitrified non absorbent clay body.

If the temperature goes too high the glaze will become too melted and run off the surface of the pottery.