Temperature rise
Temperature buoyancy indicates the time period in which the ambient temperature of the respective firing stage is reached in the kiln. The temperature buoyancy is thus a component of the firing curve and a component of the firing time and originates from the raw material time, which is so important for porcelain production!
Porcelain and ceramic tableware contain, among other things, organic components that change into a gaseous state under the influence of temperature in the kiln. This sublimation causes a high gas pressure in the green body if the diffusion process is hindered by a too low porosity or by a too fast temperature rise. A number of undesired reactions occur, e.g.
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