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- W1968394187 abstract "Abstract Hard (Mn-doped) PZT ceramics having grain sizes in the range 4 to 9 μm were subjected to an AC electric field with an amplitude E 0 of 0.1 to 3.5 kV mm-1. The dielectric characteristics were determined by analysis of the measured P-E (polarisation-electric field) hysteresis data. It was found that the saturation polarisation Ps, measured at a field amplitude of 3.5 kV mm-1, reduced from 29 to 21 μC cm-2 as the grain size reduced from 7.1 to 4.1 μun, indicating an increased resistance to ferroelectric domain switching in the fine-grained material. In contrast, the dielectric permittivity and loss (εr |, εr ∥), measured in the field range below the coercive field E c, both increased with a reduction in grain size; this was attributed to an increase in the domain wall density in fine-grained ceramics. Near-linear εr | - E 0 plots were obtained for 0.3 kV mm-1 < E01.7 kV mm-1, giving a good fit to the Rayleigh Law. Rayleigh coefficients of 0.81 × 10-3, 0.64 × 10-3 and 0.53 × 10-3 m V-1 were obtained for hard PZT ceramics having grain sizes of 4.1, 7.1 and 8.9 μm respectively" @default.
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- W1968394187 date "1999-03-01" @default.
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- W1968394187 title "The effect of grain size on the high field dielectric properties of hard PZT ceramics" @default.
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- W1968394187 doi "https://doi.org/10.1080/00150199908260585" @default.
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