Title :
A new method for measuring ultra-low frequency dielectric spectroscopy
Author :
Zhang, Yewen ; Liu, Yaonan
Author_Institution :
Dept. of Electr. Eng., Xi´´an Jiaotong Univ., Shaanxi, China
Abstract :
A novel method is described for performing ultralow-frequency dielectric spectroscopy by the fast Fourier transform (FFT) technique. Measuring the absorption current by an electrometer, two groups of data with different sampling time intervals are obtained. The FFT is then used to implement the complex dielectric frequency spectroscopy, the frequency ranging from 10-5 Hz to 0.5 Hz. The measuring system, consisting of an electrometer and a microcomputer, can perform data collection and spectroscopy calculation automatically. This FFT-based method can greatly reduce the calculation time. Experimental results on various kinds of materials show that the proposed approach is successful. The sensitivity of ε" is about 10-4
Keywords :
dielectric measurement; electrometers; fast Fourier transforms; spectroscopy; 1E-5 to 0.5 Hz; absorption current; complex dielectric frequency spectroscopy; data collection; electrometer; fast Fourier transform; sampling time intervals; ultra-low frequency dielectric spectroscopy; Absorption; Current measurement; Dielectric measurements; Electrochemical impedance spectroscopy; Fast Fourier transforms; Frequency measurement; Microcomputers; Performance evaluation; Sampling methods; Time measurement;
Conference_Titel :
Properties and Applications of Dielectric Materials, 1988. Proceedings., Second International Conference on Properties and Applications of
Conference_Location :
Beijing
DOI :
10.1109/ICPADM.1988.38461
