Article ID Journal Published Year Pages File Type
1784435 Infrared Physics & Technology 2013 5 Pages PDF
Abstract

•The FR(LT)–FR(HT) phase transition was reduced from 41 °C to 24 °C with MgO addition.•Superior pyroelectric properties were obtained in 0.10 wt% MgO-modified sample.•The largest p of 65 × 10−8 C cm−2 K−1 was achieved at room temperature.•Fd of 20 × 10−5 Pa−1/2 and Fv of 0.91 m2C−1 were also attained at room temperature.

The dielectric and pyroelectric responses of MgO-modified Pb0.99(Zr0.95Ti0.05)0.98Nb0.02O3 ceramics were investigated near FR(LT)–FR(HT) phase transition. It was found that MgO additive reduced the FR(LT)–FR(HT) phase transition temperature from 41 °C to room temperature (24 °C). Superior room-temperature pyroelectric properties were obtained in the composition of 0.10 wt% MgO addition without DC bias. The largest pyroelectric coefficient, 65 × 10−8 C cm−2 K−1, was detected. Accordingly, the detectivity figures of merit Fd had maximum values of 20 × 10−5 Pa−1/2, and especially the voltage responsivity Fv = 0.91 m2C−1 is the highest value reported so far among all pyroelectric materials. It shows promising potential for application in uncooled pyroelectric infrared detector.

Related Topics
Physical Sciences and Engineering Physics and Astronomy Atomic and Molecular Physics, and Optics
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