Modified lead scandium tantalate for uncooled LWIR detection and thermal imaging

R. W. Whatmore; N. W. Shorrocks; P. C. Osbond; S. B. Stringfellow; C. F. Carter; R. Watton

doi:10.1109/ISAF.1992.300663

Modified lead scandium tantalate for uncooled LWIR detection and thermal imaging

R. W. Whatmore
, N. W. Shorrocks
, P. C. Osbond
, S. B. Stringfellow
, C. F. Carter
, R. Watton

Research output: Chapter in Book/Report/Conference proceedings › Conference proceeding › peer-review

Abstract

Lead scandium tantalate (PST) has been shown to have exceptionally good pyroelectric figures of merit, especially for small detectors of the type involved in the large arrays needed for uncooled solid-state thermal imaging. The authors review the properties of PST in relation to those of other materials which have been considered for use in this role and discuss how dopants, including K/Bi, Nb, Ti, and Zr, can be used to modify the properties of the material in a way which would be beneficial to certain modes of detector operation, particularly with respect to the elimination of the requirement for cooling. F_D figures-of-merit of over 2010^-5 Pa^-1/2 are reported. The results of measurements of the properties of PST after aging under high fields are presented. The major observed change is in that dielectric loss increases gradually due to a thermally activated process, showing an increase of about 20% after 5000 h at 100 degrees C, corresponding to more than 5 yr at or below 70 degrees C. These changes are acceptable for device applications. Single-element detectors have been made using PST and their properties have been assessed.

Original language	English
Title of host publication	ISAF 1992 - Proceedings of the 8th IEEE International Symposium on Applications of Ferroelectrics
Editors	Michael Liu, Ahmad Safari, Angus Kingon, Gene Haertling
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	202-205
Number of pages	4
ISBN (Electronic)	0780304659, 9780780304659
DOIs	https://doi.org/10.1109/ISAF.1992.300663
Publication status	Published - 1992
Externally published	Yes
Event	8th IEEE International Symposium on Applications of Ferroelectrics, ISAF 1992 - Greenville, United States Duration: 30 Aug 1992 → 2 Sep 1992

Publication series

Name	ISAF 1992 - Proceedings of the 8th IEEE International Symposium on Applications of Ferroelectrics

Conference

Conference	8th IEEE International Symposium on Applications of Ferroelectrics, ISAF 1992
Country/Territory	United States
City	Greenville
Period	30/08/92 → 2/09/92

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10.1109/ISAF.1992.300663

Cite this

Whatmore, R. W., Shorrocks, N. W., Osbond, P. C., Stringfellow, S. B., Carter, C. F., & Watton, R. (1992). Modified lead scandium tantalate for uncooled LWIR detection and thermal imaging. In M. Liu, A. Safari, A. Kingon, & G. Haertling (Eds.), ISAF 1992 - Proceedings of the 8th IEEE International Symposium on Applications of Ferroelectrics (pp. 202-205). Article 300663 (ISAF 1992 - Proceedings of the 8th IEEE International Symposium on Applications of Ferroelectrics). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/ISAF.1992.300663

Whatmore, R. W. ; Shorrocks, N. W. ; Osbond, P. C. et al. / Modified lead scandium tantalate for uncooled LWIR detection and thermal imaging. ISAF 1992 - Proceedings of the 8th IEEE International Symposium on Applications of Ferroelectrics. editor / Michael Liu ; Ahmad Safari ; Angus Kingon ; Gene Haertling. Institute of Electrical and Electronics Engineers Inc., 1992. pp. 202-205 (ISAF 1992 - Proceedings of the 8th IEEE International Symposium on Applications of Ferroelectrics).

@inproceedings{4814715fde7e41258681ddc5248fccda,

title = "Modified lead scandium tantalate for uncooled LWIR detection and thermal imaging",

abstract = "Lead scandium tantalate (PST) has been shown to have exceptionally good pyroelectric figures of merit, especially for small detectors of the type involved in the large arrays needed for uncooled solid-state thermal imaging. The authors review the properties of PST in relation to those of other materials which have been considered for use in this role and discuss how dopants, including K/Bi, Nb, Ti, and Zr, can be used to modify the properties of the material in a way which would be beneficial to certain modes of detector operation, particularly with respect to the elimination of the requirement for cooling. FD figures-of-merit of over 2010-5 Pa-1/2 are reported. The results of measurements of the properties of PST after aging under high fields are presented. The major observed change is in that dielectric loss increases gradually due to a thermally activated process, showing an increase of about 20\% after 5000 h at 100 degrees C, corresponding to more than 5 yr at or below 70 degrees C. These changes are acceptable for device applications. Single-element detectors have been made using PST and their properties have been assessed.",

author = "Whatmore, \{R. W.\} and Shorrocks, \{N. W.\} and Osbond, \{P. C.\} and Stringfellow, \{S. B.\} and Carter, \{C. F.\} and R. Watton",

note = "Publisher Copyright: {\textcopyright} 1992 IEEE.; 8th IEEE International Symposium on Applications of Ferroelectrics, ISAF 1992 ; Conference date: 30-08-1992 Through 02-09-1992",

year = "1992",

doi = "10.1109/ISAF.1992.300663",

language = "English",

series = "ISAF 1992 - Proceedings of the 8th IEEE International Symposium on Applications of Ferroelectrics",

publisher = "Institute of Electrical and Electronics Engineers Inc.",

pages = "202--205",

editor = "Michael Liu and Ahmad Safari and Angus Kingon and Gene Haertling",

booktitle = "ISAF 1992 - Proceedings of the 8th IEEE International Symposium on Applications of Ferroelectrics",

address = "United States",

}

Whatmore, RW, Shorrocks, NW, Osbond, PC, Stringfellow, SB, Carter, CF & Watton, R 1992, Modified lead scandium tantalate for uncooled LWIR detection and thermal imaging. in M Liu, A Safari, A Kingon & G Haertling (eds), ISAF 1992 - Proceedings of the 8th IEEE International Symposium on Applications of Ferroelectrics., 300663, ISAF 1992 - Proceedings of the 8th IEEE International Symposium on Applications of Ferroelectrics, Institute of Electrical and Electronics Engineers Inc., pp. 202-205, 8th IEEE International Symposium on Applications of Ferroelectrics, ISAF 1992, Greenville, United States, 30/08/92. https://doi.org/10.1109/ISAF.1992.300663

Modified lead scandium tantalate for uncooled LWIR detection and thermal imaging. / Whatmore, R. W.; Shorrocks, N. W.; Osbond, P. C. et al.
ISAF 1992 - Proceedings of the 8th IEEE International Symposium on Applications of Ferroelectrics. ed. / Michael Liu; Ahmad Safari; Angus Kingon; Gene Haertling. Institute of Electrical and Electronics Engineers Inc., 1992. p. 202-205 300663 (ISAF 1992 - Proceedings of the 8th IEEE International Symposium on Applications of Ferroelectrics).

Research output: Chapter in Book/Report/Conference proceedings › Conference proceeding › peer-review

TY - GEN

T1 - Modified lead scandium tantalate for uncooled LWIR detection and thermal imaging

AU - Whatmore, R. W.

AU - Shorrocks, N. W.

AU - Osbond, P. C.

AU - Stringfellow, S. B.

AU - Carter, C. F.

AU - Watton, R.

PY - 1992

Y1 - 1992

N2 - Lead scandium tantalate (PST) has been shown to have exceptionally good pyroelectric figures of merit, especially for small detectors of the type involved in the large arrays needed for uncooled solid-state thermal imaging. The authors review the properties of PST in relation to those of other materials which have been considered for use in this role and discuss how dopants, including K/Bi, Nb, Ti, and Zr, can be used to modify the properties of the material in a way which would be beneficial to certain modes of detector operation, particularly with respect to the elimination of the requirement for cooling. FD figures-of-merit of over 2010-5 Pa-1/2 are reported. The results of measurements of the properties of PST after aging under high fields are presented. The major observed change is in that dielectric loss increases gradually due to a thermally activated process, showing an increase of about 20% after 5000 h at 100 degrees C, corresponding to more than 5 yr at or below 70 degrees C. These changes are acceptable for device applications. Single-element detectors have been made using PST and their properties have been assessed.

AB - Lead scandium tantalate (PST) has been shown to have exceptionally good pyroelectric figures of merit, especially for small detectors of the type involved in the large arrays needed for uncooled solid-state thermal imaging. The authors review the properties of PST in relation to those of other materials which have been considered for use in this role and discuss how dopants, including K/Bi, Nb, Ti, and Zr, can be used to modify the properties of the material in a way which would be beneficial to certain modes of detector operation, particularly with respect to the elimination of the requirement for cooling. FD figures-of-merit of over 2010-5 Pa-1/2 are reported. The results of measurements of the properties of PST after aging under high fields are presented. The major observed change is in that dielectric loss increases gradually due to a thermally activated process, showing an increase of about 20% after 5000 h at 100 degrees C, corresponding to more than 5 yr at or below 70 degrees C. These changes are acceptable for device applications. Single-element detectors have been made using PST and their properties have been assessed.

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M3 - Conference proceeding

AN - SCOPUS:84992636159

T3 - ISAF 1992 - Proceedings of the 8th IEEE International Symposium on Applications of Ferroelectrics

SP - 202

EP - 205

BT - ISAF 1992 - Proceedings of the 8th IEEE International Symposium on Applications of Ferroelectrics

A2 - Liu, Michael

A2 - Safari, Ahmad

A2 - Kingon, Angus

A2 - Haertling, Gene

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 8th IEEE International Symposium on Applications of Ferroelectrics, ISAF 1992

Y2 - 30 August 1992 through 2 September 1992

ER -

Whatmore RW, Shorrocks NW, Osbond PC, Stringfellow SB, Carter CF, Watton R. Modified lead scandium tantalate for uncooled LWIR detection and thermal imaging. In Liu M, Safari A, Kingon A, Haertling G, editors, ISAF 1992 - Proceedings of the 8th IEEE International Symposium on Applications of Ferroelectrics. Institute of Electrical and Electronics Engineers Inc. 1992. p. 202-205. 300663. (ISAF 1992 - Proceedings of the 8th IEEE International Symposium on Applications of Ferroelectrics). doi: 10.1109/ISAF.1992.300663

Modified lead scandium tantalate for uncooled LWIR detection and thermal imaging

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