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- W1963947368 abstract "Abstract Pyroelectric ceramics with the starting composition: Pb1.02-α/100Srα/100(Zr0.58Fe0.20Nb0.20Ti0.02)0.995U0.005O3 where α is in the range 0–8, were fabricated via the hot-pressing of mixed oxide powders. With increasing values of α, it was found that the Curie temperature decreased and the room temperature dielectric constant (E r ) and pyroelectric coefficient p(T) increased. The figure of merit FD , which maximises detectivity, had a peak value of 6.0 × 10−5Pa−1/2 when α = 4. This composition had a dielectric loss, ε r and p(T) values of 0.28%, 398 and 4.9 × 10−4 Cm−2K−1 respectively at room temperature and 1592 Hz, with a minimum in loss at 5 × 103 Hz. The grain size of these ceramics was found to be highly dependent on the level of Sr substitution; for a values greater than 2, a coarse (12 μm) grain structure was observed at the edges of the ceramic wafers and this gradually decreased to a grain size of 5 μm in the centre. Possible causes for this microstructural effect are discussed. The ferroelectric domain structures for these ceramics in the unpoled, partially poled and fully poled states are also reported." @default.
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- W1963947368 date "1991-06-01" @default.
- W1963947368 modified "2023-10-18" @default.
- W1963947368 title "Improvements to pyroelectric ceramics via strontium doping of the lead zirconate-lead iron niobate-lead titanate system" @default.
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- W1963947368 doi "https://doi.org/10.1080/00150199108014749" @default.
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