Polarization Hysteresis Ciruit

AI Thread Summary
To measure the electric polarization hysteresis loop, a Sawyer-Tower circuit is recommended, which primarily includes a resistor and a capacitor. The exact values for these components depend on the specific material being tested. It is crucial to consider that charge release can be slow, particularly with electrolytic capacitors. For accurate measurements, it is advised to disconnect the capacitor and store it in a dry atmosphere until ready for measurement, as the final 0.1% of charge may take days to release, while the initial 20% is available within seconds. References for specific resistor and capacitor values may be necessary for precise circuit design.
welatiger
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Hi all,
I want to measure electric polarization hysteresis loop so i need the electric circuit to measure it.
The circuit mostly contains a resistor and a capacitance, i need to what is the exact value of them ?

Please tell me if there is a reference for that
Thank you
 
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welatiger said:
Hi all,
I want to measure electric polarization hysteresis loop so i need the electric circuit to measure it.
The circuit mostly contains a resistor and a capacitance, i need to what is the exact value of them ?

Please tell me if there is a reference for that
Thank you

note : the circuit called Sawyer-Tower Circuit
 
Depending on the material, charge release can be very slow, for instance in electrolytic capacitors. In such a case, the only sensible circuit is to disconnect completely the capacitor, keep it clean in a dry atmosphere, and reconnect it only for the measure. It can take several days before the last 0.1% of charge is released, while the first 20% which are absorbed by polarization are available in few seconds.
 

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