Title :
Internal bias and aging of materials properties in ferroelectric ceramics
Author :
Robels, U. ; Lohkämper, R. ; Arlt, G.
Author_Institution :
Inst. fur Werkstoffe der Elektrotech., Aachen Univ. of Technol., Germany
Abstract :
By simultaneous measurements of the internal bias and the dielectric constant in acceptor doped barium-titanate ceramics a distinct relation between the aging of the material properties and the increase of the internal bias was found. It was assumed that the aging of the materials properties was caused to a significant extent by domain wall clamping due to the internal bias field. Additional measurements of the temperature dependence of the dielectric constant at differently aged acceptor-doped lead zirconate-titanate (PZT) samples indicated that aging is partly limited to a temperature interval above and below the aging temperature
Keywords :
ageing; barium compounds; ceramics; electric domain walls; ferroelectric materials; lead compounds; permittivity; BaTiO3NiO3; PZT; PbZrO3TiO3; acceptor-doped; aging; dielectric constant; domain wall clamping; ferroelectric ceramics; internal bias; Aging; Ceramics; Dielectric constant; Dielectric measurements; Ferroelectric materials; Lattices; Material properties; Polarization; Temperature dependence; Time measurement;
Conference_Titel :
Applications of Ferroelectrics, 1990., IEEE 7th International Symposium on
Conference_Location :
Urbana-Champaign, IL
Print_ISBN :
0-7803-0190-0
DOI :
10.1109/ISAF.1990.200284
