The properties of ceramic components are decisively dependent on the quality of the starting powders: in addition to the particle size distribution and shape, the important parameters are the BET surface area and density.Further the type and performance of the molding process is essential: e.g. in the case of a wet process (suspension route), the slurry properties influence the properties of the green body in addition to the real process parameters. The essential quality features here are the stability of the suspension against sedimentation and agglomeration, whereby the zeta potential plays an important role in electrostatically or sterically stabilized systems. Moreover, the rheological properties are crucial for shaping of the bodies.Optimized properties of the green body, in particular a proper distribution and size of the pores for the sintering process and, of course, the shape stability, are absolutely required for an ideal ceramic end product!
| ANALYSIS METHOD | PARAMETER | MEASURING INSTRUMENT |
|---|---|---|
| Laser diffraction (wet or dry) | Particle size of powders | Bettersizer S3 series Bettersizer 2600 Bettersizer ST |
| Image analysis | Particle shape | BeVision D2 Bettersizer S3 Plus |
| DLS – dynamic light scattering (Photon correlation) | Particle size in nanometer ranges | BeNano series |
| Acoustic spectrometry | Particle size in micrometer and nanometer ranges in concentrated dispersions | DT-1202 DT-100 |
| Electro acoustic | Zeta potential | DT-1202 DT-310 DT-300 |
| Multiple light scattering | Stability of dispersions | Contract analysis |
| Gas adsorption | BET-surface area and pore analysis | 3P micro series 3P meso series 3P sync series 3P surface DX |
| Mercury porosimetry | Pore analysis (pore volume, pore size distribution, raw density) | Contract analysis |
| Dynamic vapor sorption – DVS | Water uptake and -release | 3P graviSorb series |
| Gas pycnometriy | Density | 3P densi series |
| Tapping volumetry | Tap density | BeDensi T series |
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