ASTM C323 evaluates the chemical composition of the clays used in the production of ceramic whitewares. The method is used to determine the amount of moisture present on the surface, loss of ignition, and compositional analysis of the constituents of the clay sample in its standard air-dried form. The data obtained is used in the manufacturing, development, and research on ceramic clays.
Scope:
The chemical examination of clays by ASTM C323 holds enormous significance as the data obtained significantly impacts the technological characterization of the ceramic clays. It provides information on plasticity, drying and firing shrinkage, mechanical resistance, and forming capacity of the given clay sample. ASTM C323 can determine all the elements present in the clay sample.
Test Procedure:
In ASTM C323, the moisture content of the sample is measured. The model is then heated to a specific temperature, and the loss in weight is referred to as the amount of water. 0.25 g of alumina is added as aluminum chloride when silica blank is to be determined. FTIR Spectroscopy is used to determine the individual elements found in the given clay sample. The sample is taken on a crystal and placed on the Spectrometer. The Spectrometer is adjusted to the position of the sample. Light falls on the sample from an infrared source of light. The amount of light absorbed tells which elements are present in the sample. The absorbance and reflectance are carefully monitored from the computer program attached to the Spectrometer
Specimen Size :
The specimen size varies depending on whether solid, liquid, or powdered, but it is mainly taken in grams or milligrams.
Data:
Absorbance (A) is measured from the data interpreted from the absorbance peaks obtained. Moisture is measured in g/m3.
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