Pyroelectric PZT/PMNZTU composite thick films

Dorey, Robert; Whatmore, R. W.

doi:10.1016/j.jeurceramsoc.2005.03.060

Cited by 16 publications

(9 citation statements)

References 14 publications

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“…At 100 kHz, the dielectric constant and dielectric loss (at 20°C) of the 1.0 mol% La 2 O 3 ‐doped NKBT thick films are 372% and 4.6%, respectively. Because the infrared devices are commonly used in low frequency (<100 Hz), The F D calculated at low frequency (50 Hz) is 0.51 × 10 −5 Pa −0.5 , which is about half of the value of 1.01 × 10 −5 Pa −0.5 of the F D calculated by Dorey and Whatmore 6 at 30 Hz. The detectivity figure of merit was significantly influenced by the frequency because the dielectric constant and the dielectric loss changed with the frequency.…”

Section: Resultsmentioning

confidence: 63%

Dielectric, Ferroelectric, Pyroelectric, and Piezoelectric Properties of La‐Modified Lead‐Free Sodium–Potassium Bismuth Titanate Thick Films

Zhang

Jiang

Kajiyoshi

et al. 2010

Journal of the American Ceramic Society

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La2O3‐doped sodium–potassium bismuth titanate (Na0.82K0.18)0.5Bi0.5TiO3 (NKBT) lead‐free thick films have been prepared on Pt‐electroded alumina substrates using a combination of screen printing and subsequent infiltration of the corresponding composite sol. Their densification, microstructure, dielectric, ferroelectric, pyroelectric, and piezoelectric properties were investigated with variation of the La2O3 content. The resulting 40 μm‐thick NKBT films doped with 1.0 mol% La2O3 show minimum leakage current density of 1.56 × 10−9 A/cm2 at an applied field of 100 kV/cm, remanent polarization of 21.6 μC/cm2, and coercive field of 58 kV/cm. The high pyroelectric coefficient of 2.0 × 10−4 C·(m2·°C)−1, the calculated detectivity figure of merit as high as 0.81 × 10−5 Pa−0.5, and the value of remanent d33eff of 108 pm/V at room temperature (20°C) were observed in 1.0 mol% La2O3‐doped NKBT thick films, which can be comparable with that of the commonly used lead‐based materials. The enhancement of the pyroelectric and piezoelectric performances is attributed to the reduction of lattice tetragonality, uniform microstructure, and improved densification in La‐modified NKBT thick films.

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Section: Resultsmentioning

confidence: 63%

Dielectric, Ferroelectric, Pyroelectric, and Piezoelectric Properties of La‐Modified Lead‐Free Sodium–Potassium Bismuth Titanate Thick Films

Zhang

Jiang

Kajiyoshi

et al. 2010

Journal of the American Ceramic Society

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show abstract

“…Because the infrared devices are commonly used in low frequency (<100 Hz), The calculated F D in low frequency (50 Hz) is 0.51 × 10 −5 Pa −0.5 , which is about half of the value of 1.01 × 10 −5 Pa −0.5 of the F D calculated by Dorey and Whatmore in 30 Hz. 35 The detectivity figure of merit significantly influenced by the frequency because the dielectric constant and the dielectric loss changed with the frequency.…”

Section: Resultsmentioning

confidence: 99%

Low temperature preparation and electrical properties of sodium–potassium bismuth titanate lead-free piezoelectric thick films by screen printing

Zhang

Jiang

Xiao

et al. 2010

Journal of the European Ceramic Society

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“…Pyroelectric materials are of significant interest as they are widely used for the detection of infrared (IR) radiations, with wavelengths ranging between 3 and 5 µm as well as 8 and 14 µm without the need of cooling . Detection of such radiations finds applications in many areas such as thermal imaging, fire detection, motion sensing, and robotics.…”

Section: Introductionmentioning

confidence: 99%

Enhancement in pyroelectric properties of PZT‐PVA polymer nanocomposites with addition of PAA

Uma

Philip

2014

J of Applied Polymer Sci

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Composites comprising of pyroelectric ceramics and electro-active polymers have gained importance currently as materials for thermal sensing applications, as their unique features and relevant properties can be tailored easily. In this work nanoparticles of PZT have been embedded into PVA/PAA copolymer matrix to form 0 to 3 nanocomposites. Films of the composites are prepared following solvent cast method after dispersing ceramic nanopowder homogeneously in the copolymer matrix with different wt % of the PZT powder. Relevant properties such as dielectric constant and loss factor, pyroelectric coefficients, thermal conductivity, and specific heat capacity as well as Shore hardness have been measured. The material figures of merit for pyroelectric detection have also been determined and reported. It is found that pyroelectric sensing properties of a film of the composite with 20 wt % PZT are comparable to those of commercially used b-PVDF film for the same application, but with a lower figure of merit. However, it provides greater mouldability and simpler processibility for the fabrication of bulk sensors and actuators. So this composite can be considered as a potential material for the design and fabrication of mouldable pyroelectric detectors and actuators.

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Pyroelectric PZT/PMNZTU composite thick films

Cited by 16 publications

References 14 publications

Dielectric, Ferroelectric, Pyroelectric, and Piezoelectric Properties of La‐Modified Lead‐Free Sodium–Potassium Bismuth Titanate Thick Films

Dielectric, Ferroelectric, Pyroelectric, and Piezoelectric Properties of La‐Modified Lead‐Free Sodium–Potassium Bismuth Titanate Thick Films

Low temperature preparation and electrical properties of sodium–potassium bismuth titanate lead-free piezoelectric thick films by screen printing

Enhancement in pyroelectric properties of PZT‐PVA polymer nanocomposites with addition of PAA

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