DocumentCode :
1525587
Title :
Harmonic analysis of the polarization response in Pb(Mg/sub 1/3/Nb/sub 2/3/)O/sub 3/-based ceramics-A study in aging
Author :
Leary, Sean P. ; Pilgrim, Steven M.
Author_Institution :
New York State Coll. of Ceramics, Alfred Univ., NY, USA
Volume :
45
Issue :
1
fYear :
1998
Firstpage :
163
Lastpage :
169
Abstract :
The polarization response of a ferroelectric ceramic displays nonlinear behavior at high applied fields due to saturation effects. Weak-field dielectric aging imposes additional nonlinearity on the hysteresis loops of these materials. Harmonic analysis using a discrete Fourier transform (DFT) permitted an observation of the change in the polarization frequency spectrum as Pb(Mg/sub 1/3/Nb/sub 2/3/)O/sub 3/-based relaxor ceramics aged. It also facilitated the calculation of ac current, power, and "internal bias field". The results show that particular harmonics in the polarization signal are sensitive indications of aging behavior. The average power dissipated at weak ac fields was found to decrease with aging time; and the power dissipated at strong fields tended to increase.
Keywords :
ageing; ceramics; dielectric hysteresis; dielectric polarisation; discrete Fourier transforms; ferroelectric materials; harmonic analysis; lead compounds; AC current; PMN; Pb(Mg/sub 1/3/Nb/sub 2/3/)O/sub 3/; PbMgO3NbO3; discrete Fourier transform; frequency spectrum; harmonic analysis; hysteresis loop; internal bias field; nonlinearity; polarization response; power dissipation; relaxor ferroelectric ceramic; saturation; weak-field dielectric aging; Aging; Ceramics; Dielectric materials; Discrete Fourier transforms; Displays; Ferroelectric materials; Frequency; Harmonic analysis; Hysteresis; Polarization;
fLanguage :
English
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
Publisher :
ieee
ISSN :
0885-3010
Type :
jour
DOI :
10.1109/58.646921
Filename :
646921
Link To Document :
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