Pyroelectric Coefficient Direct Measurement Technique and Application to a Nsec Response Time Detector

Byer, Robert L.; Roundy, Carlos B.

doi:10.1109/t-su.1972.29679

Cited by 106 publications

(57 citation statements)

References 11 publications

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“…Dielectric data was collected over a temperature range from RT to 150°C using a temperature controlled hotplate in the frequency range of 0.1-10 kHz. Pyroelectric measurements were made using the ByerRoundy [16] method at the temperature between 20 and 90°C (equipment up limitation) under vacuum and the pyroelectric current was collected by a Kiethley electrometer (Model 6217). Dielectric and pyroelectric data was then used to study the phase changes such as depolarization temperatures ( Sample compositions are listed in Table 1.…”

Section: Methodsmentioning

confidence: 99%

The effects of Ba2+ content on depolarization temperature and pyroelectric properties of lead-free 0.94Na0.5Bi0.5TiO3–0.06Ba1+xTiO3 ceramics

Balakt

Shaw

Zhang

2016

J Mater Sci: Mater Electron

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Lead-free 0.94Na 0.5 Bi 0.5 TiO 3 -0.06Ba 1?x TiO 3 (NBT-0.06B 1?x T) ceramics (0.0 B x B 0.03) were synthesized by a conventional solid-state reaction process. X-ray diffraction shows that the compositions are at the morphotropic phase boundary where rhombohedral and tetragonal phase coexist. Grain size slightly changes with the increase of Ba 2? content and reaches the minimum at x = 0.02. The depolarization temperature (T d ) decreases with the extra Ba 2? content but the lowest T d was obtained at x = 0.01-0.02. The pyroelectric coefficient (p) was measured as a function of Ba 2? content, and increased from 2.90 9 10 -4 to 3.54 9 10 -4 C m -2°C-1 , and from 55.3 9 10 -4 to 740.7 9 10 -4 C m -2°C-1 for x = 0.00 and 0.02 at RT, and depolarization temperature (T d ) respectively. The pyroelectric coefficient (p) shows a large increase with rising the temperature and reaches the maximum value at the depolarization temperature (T d ). The figures of merits of F i , F v and F D have all been improved with the addition of extra barium. These improved pyroelectric properties indicate that NBT-0.06B 1?x T is a promising material for pyroelectric applications or a wide range of temperature.

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Section: Methodsmentioning

confidence: 99%

The effects of Ba2+ content on depolarization temperature and pyroelectric properties of lead-free 0.94Na0.5Bi0.5TiO3–0.06Ba1+xTiO3 ceramics

Balakt

Shaw

Zhang

2016

J Mater Sci: Mater Electron

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“…Dielectric measurements were performed on an impedance analyser (Wayne kerr Electronics Ltd. Model 3245 and Hewlett Packard HP4092A)] over a temperature range from RT to 150°C using a custom-built temperature-controlled hotplate in the frequency range of 0.1-10 kHz. Pyroelectric measurements were made using the Byer-Roundy [18] method on a custombuilt computer-controlled rig which used thermoelectric heaters to ramp the temperature between 20 and 90°C while under vacuum and collect the pyroelectric current response from a Keithley electrometer (Model 6217). Dielectric and pyroelectric data were then used to study the phase changes such as depolarization temperatures (T d ) and to determine figure of merit values F i , F v , F D , and F C .…”

Section: Methodsmentioning

confidence: 99%

Large pyroelectric properties at reduced depolarization temperature in A-site nonstoichiometry composition of lead-free 0.94Na x Bi y TiO3–0.06Ba z TiO3 ceramics

2017

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Nonstoichiometry lead-free 0.94Na x Bi y TiO 3 -0.06Ba z TiO 3 (N x B y T-0.06B z T) (from x = y = 0.5, z = 1.00 to x = 0.5, y = 0.534, z = 1.02) ceramic compositions were prepared by a conventional solid-state route. XRD shows that the compositions are at a morphotropic phase boundary where rhombohedral and tetragonal phases coexist. The depolarization temperature (T d ) can be lowered by modifying x, y and z. The pyroelectric coefficient (p) of nonstoichiometry N x B y T-0.06B z T compositions is greatly increased, compared with stoichiometry NBT-0.06BT composition, from 3.15 9 10 -4 C m -2°C-1 at room temperature (RT) and 23.9 9 10 -4 C m -10 m v -1 , 0.39 9 10 -10 m 2 C -1 and 138.7 9 10 -6 Pa -1/2 , respectively, at T d . The same composition also presents F C values which are *2.58 and *2.86 (910 -9 C cm -2°C-1 ) at RT at 100 and 1000 (Hz). N 0.5 B 0.534 T-0.06BT and N 0.5 B 0.534 T-0.06B 1.02 T compositions show a large p values at a wide temperature range. The enhanced pyroelectric properties make nonstoichiometry N 0.52 B 0.52 T-0.06BT composition a promising candidate for pyroelectric and other applications at wide temperatures range.

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“…The relative permittivity and dielectric loss factor as a function of temperature from 25 C to 60 C at 10 kHz were measured using HP 4284A LCR tester equipped with a temperature chamber. The pyroelectric coefficient was observed by using the Byer-Roundy method by the measurement system that was set up by ourselves, 19 the pyroelectric coefficient of the composites was calculated using Eq. (2):…”

Section: Methodsmentioning

confidence: 99%

Enhanced thermal and pyroelectric properties in 0–3 TGS:PVDF composites doped with graphene for infrared application

Feng

Wang

et al. 2017

J. Adv. Dielect.

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Pyroelectric composites of triglycine sulfate (TGS)-polyvinylidene difluoride (PVDF) doped with graphene are studied. It is found that the graphene can effectively improve the polling efficiency and thermal property of the composites so that the infrared detective performance can be significantly improved. For example, by adding about 0.83 wt.% of graphene, the infrared detective property can be improved by more than 30%. It is also found that the size of the graphene plays a critical role on the property improvement. For example, the small-sized graphene prepared by ultrasonic exfoliation (UE) method is more effective than the big-sized graphene prepared by electrochemical exfoliation (EE) method.

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Pyroelectric Coefficient Direct Measurement Technique and Application to a Nsec Response Time Detector

Cited by 106 publications

References 11 publications

The effects of Ba2+ content on depolarization temperature and pyroelectric properties of lead-free 0.94Na0.5Bi0.5TiO3–0.06Ba1+xTiO3 ceramics

The effects of Ba2+ content on depolarization temperature and pyroelectric properties of lead-free 0.94Na0.5Bi0.5TiO3–0.06Ba1+xTiO3 ceramics

Large pyroelectric properties at reduced depolarization temperature in A-site nonstoichiometry composition of lead-free 0.94Na x Bi y TiO3–0.06Ba z TiO3 ceramics

Enhanced thermal and pyroelectric properties in 0–3 TGS:PVDF composites doped with graphene for infrared application

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