Time Dependence of Material Properties

One or more PRAP analysed resonance files can be added to a PRAP compound file (of extension '.PZC'). By including analysed resonance spectra acquired at different times, the time dependence of material properties can be studied. The time since poling or since the application of a DC bias voltage could be studied. The added resonance spectra should in general be acquired at the same DC bias voltage and temperature.

To study the effect of time on the material properties;

Open a new compound file with the 'New Compound File' command of the File menu.
Using the 'Add PZF File' command of the File menu, add the spectra you wish to study.
Ensure that each spectrum has been analysed. You can do this by displaying each included resonance scan with the 'Display Resonance Scan' menu command from the Window menu.
Selected the 'Display Axes' command of the Window menu.
For the x-axis, select time in seconds.
For the y-axis, select the material property to be studied. The list of available properties is limited to those available from the analysed resonance spectra included in the compound file.
Select 'OK'. The real and imaginary parts of the selected property will be plotted as a function of time.
The results can be copied to another Windows application with the Copy command of the File menu.

Optional Time Data Acquisition Module

An optional data acquisition module is available that allows resonance spectra to be automatically collected as a function of time in linear or logarithmic intervals. This greatly simplifies the process of performing ageing studies and removes the tedium and chance for error of manually collecting individual resonance scans, analysing them, and adding them to a compound file. This optional module requires the PRAP basic data acquisition module.

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