Journal ArticleDOI
Pyroelectric, dielectric and thermal properties of TGS, DTGS and TGFB
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In this article, the pyroelectric coefficient, dielectric constant, specific heat and thermal diffusivity of TGS, DTGS and TGFB have been measured as a function of temperature.Abstract:
The pyroelectric coefficient, dielectric constant, specific heat and thermal diffusivity of TGS, DTGS and TGFB have been measured as a function of temperature. At a given Tc — T, the deuteration seems to increase the pyroelectric coefficient by a factor 1.35, with a smaller increase in the dielectric constant. For TGFB a good Curie law of the dielectric constant has never been observed. The anomalies at Tc of both the specific heat and thermal diffusivity are much larger for TGFB than for TGS and DTGS. This is consistent with the different temperature variations of both the pyroelectric coefficient and dielectric constant. A discussion is given of the interest of DTGS and TGFB versus TGS, for pyroelectric detection.read more
Citations
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Journal ArticleDOI
Pyroelectric devices and materials
TL;DR: The physics of pyroelectric detectors is reviewed in this paper, including a discussion of response and electronic noise and their dependence on device design and material parameters, together with techniques for their minimisation.
Journal ArticleDOI
Ferroelectric materials and devices in infrared detection and imaging
TL;DR: The use of ferroelectric materials for infrared detection and thermal imaging is an established technology as mentioned in this paper, based on the ambient temperature operation and the potential for low power and cheap detector technologies.
Journal ArticleDOI
Growth and properties of triglycine sulfate (TGS) crystals: Review
Ravindra B. Lal,Ashok K. Batra +1 more
TL;DR: The present status of data on growth and properties of pure and doped single crystals of triglycine sulfate (TGS) is reviewed in this paper, where the results of growth and characteristics of TGS crystals grown in the low-gravity environment of the space shuttle for infrared detector applications are presented.
Journal ArticleDOI
Induced pyroelectricity in sputtered lead scandium tantalate films and their merit for IR detector arrays
R. Watton,M. A. Todd +1 more
TL;DR: In this article, a thin film of lead scandium tantalate Pb(Sc 1/2Ta1/2)O3 was prepared by rf magnetron sputtering.
Journal ArticleDOI
Advances in lead-free pyroelectric materials: a comprehensive review
TL;DR: A comprehensive review on the up-to-date advances in lead-free pyroelectrics, including single crystals, ceramics, inorganic films, polymers and composites, is presented in this paper.
References
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Journal ArticleDOI
Flash Method of Determining Thermal Diffusivity, Heat Capacity, and Thermal Conductivity
TL;DR: In this paper, a high-intensity short-duration light pulse is absorbed in the front surface of a thermally insulated specimen, and the resulting temperature history of the rear surface is measured by a thermocouple and recorded with an oscilloscope and camera.
Journal ArticleDOI
Characterization of fully deuterated triglycine sulfate (ND2CD2COOD)3D2SO4
TL;DR: In this paper, it was shown that complete deuteration of TGS does not result in an improved pyroelectric detector material since further substitution of deuterium for hydrogen in the -CH2- radical does not apparently contribute to the spontaneous polarization of the deuterated TGS.