Title :
Effects of annealing on the ageing properties of PMN-0.1PT ceramics doped by transition-metallic ions
Author :
Wang, Y. ; Straw, A. ; Chan, Y.C. ; Gui, Z.L. ; Li, L.T.
Author_Institution :
Tsinghua Univ., Beijing, China
Abstract :
Dielectric ageing behaviors of lead-based relaxor ferroelectric ceramics, which may affect their application in multilayer ceramic capacitors (MLCs), have been an important research problem for many years. In this paper, the effects of annealing on ageing properties of the PMN-0.1PT system, respectively doped with Fe, Co and Ni ions and annealed in different atmospheres (air and N2-H2) after sintering, were studied. It is found that the annealing atmosphere has a strong influence on the ageing degree of the samples. For the air-annealed samples, the decrease in the dielectric constant was small; whilst for the N2H2-annealed samples, the decrease was much greater. It is assumed that the different valences of doped ions, resulting from the different annealing atmospheres, are responsible for the different ageing degrees
Keywords :
ageing; annealing; ceramics; ferroelectric materials; lead compounds; permittivity; sintering; PMN-PT ceramic; PMN-PbTiO3; PbMgO3NbO3-PbTiO3; annealing; dielectric ageing; dielectric constant; multilayer ceramic capacitor; relaxor ferroelectric; sintering; transition-metallic ion doping; Aging; Annealing; Atmosphere; Capacitors; Ceramics; Dielectric constant; Ferroelectric materials; Nonhomogeneous media; Temperature dependence; Testing;
Conference_Titel :
Applications of Ferroelectrics, 1996. ISAF '96., Proceedings of the Tenth IEEE International Symposium on
Conference_Location :
East Brunswick, NJ
Print_ISBN :
0-7803-3355-1
DOI :
10.1109/ISAF.1996.598096