TWA 27
Characterisation Methods for Ceramic Powders and Green Bodies
The objective of this TWA was the development and standardization of test methods for the characterization of ceramic powders and green bodies as they are related to the different stages of the ceramic manufacturing process. In this regard the work covered three different areas:
- methods for powder properties
- methods for suspension characterization
- methods for green body characterization
There was a need for standardized methods for characterization of ceramic powders and porous materials. Standardized test methods were needed by industry for a better exchange of goods and services and an enhancement of trade. This concerns all materials but was especially valid for advanced ceramics. The situation was related to the complexity of the subject due to the influence of many parameters on powder properties during measurements, that include chemical impurity and inhomogeneity of the powders, and geometrical features of particles and agglomerates (shape, size and size distribution). In order to make further advances in the development of new materials, improvements were needed in characterization methods for different stages of manufacturing processes. This was especially necessary for characterisation of powders during preparation and processing of raw materials and for intermediary stages of manufacturing where powders exist in suspension-like slurries as well as during the shaping and forming process used for the preparation of green bodies.
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