Ash Shrinkage Starting Temperature (Reducing)
The ash shrinkage starting temperature is an important property of ash melting behaviour. It is defined as the temperature at which the area of the ash test piece falls below 95% of the original test piece area at 550 C. This shrinkage may be due to a number of factors, including the liberation of carbon dioxide, volatile alkali compounds, and/or sintering.
This property is determined in a reducing atmosphere using a carbon monoxide/carbon dioxide gas mix or a hydrogen and carbon dioxide gas mix. This characteristic temperature can also be determined in an oxidising atmosphere, using air or carbon dioxide, using analysis package P41 - Ash Melting Behaviour (Oxidising Conditions).
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Analysis Packages for Ash Shrinkage Starting Temperature (Reducing)The Celignis Analysis Package(s) that determine this constituent are listed below:
| Ash Shrinkage Starting Temperature (Reducing), Ash Deformation Temperature (Reducing), Ash Hemisphere Temperature (Reducing), Ash Flow Temperature (Reducing) |