EN 50324-2:2002

Foreword
1 Scope
2 Symbols and units
3 Dimensions and finish of standard test specimen
4 Electrodes
5 Environmental requirements
6 Small signal data - Timing of measurement
7 Number of test specimens
8 Methods of measurement
9 Determination of a complete set of material parameters
   - Systematic procedure
10 Errors in calculated coefficients
11 Determination of the temperature coefficient of the
   parameters
12 Temperature coefficients of calculated parameters
13 Calculation of ageing rates

The methods of measurement described in this European Standard are for use with piezoelectric components produced from the ceramic materials described in EN 50324 1 “Terms and definitions”. Methods of measurement for specific dielectric, piezoelectric and elastic coefficients are generally applicable to piezoelectric ceramics.The polycrystalline nature of ceramics, statistical fluctuations in composition and the influence of the manufacturing process, result in specified material coefficients being typical mean values. These values are provided for design information only.Piezoelectric transducers can have widely differing shapes and may be employed in a range of vibrational modes. Material parameters however, are measured on simple test-pieces (discs, rods etc. see EN 50324-1, Figure 2) using specific geometric and electrical boundary conditions. Consequently, the results of the tests provide basic material parameters only and must only be used as a guide to the actual properties of manufactured commercial components.