For each shape and material, the RFDA can produce a reproducible and accurate number for the resonance frequency and damping.
These numbers can be used for several objectives :

• to correlate them with other well known properties of the material :
  - elastic properties
  - viscosity
  - density
  - porosity
  - micro structure
  - ...
• to measure the changes after different thermal shocks and compare the results between different materials
• to detect phase transformations during sintering
• measuring the effect of different firing cycles
• follow up the drying process
• measuring of coatings
• determine the effect of aging
• measure the solidification of plaster, ...
• crack detection
• ....

For complex objects the frequency spectrum with damping is a fingerprint of the piece (material + dimensions).
When something changes, the fingerprint will change, and this will be detected by the RFDA and appropriate action can be taken.

Because of the non destructive character of the measuring principle, the system can not only be used in the lab or for R&D purposes, but also during production for :

• 100 % production control
• in process measurement (sintering, drying, ...)