JOURNAL OF THE ILLUMINATING ENGINEERING INSTITUTE OF JAPAN
Online ISSN : 1349-838X
Print ISSN : 0019-2341
ISSN-L : 0019-2341
Pyroelectric Infrared Sensor Using PbTiO3 Ceramics
Masayuki NakamotoYousuke HiraoYouhachi YamashitaNobuo Iwase
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1984 Volume 68 Issue 10 Pages 534-539

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Abstract

(Pb, Ca) ((Co1/2W1/2) Ti) O3 ceramic pyroelectric properties have been studied by changing the Ca concentration. With an increase in Ca concentration, the pyroelectric coefficient P and the figure of merit Fv increased and reached 4.43×10-8C cm-2°C-1, and 0.61×10-10C cm J-1, respectively. Pyroelectric properties have been improved to twice the values for the PbTiO3 ceramics. Ca introduction into PbTiO3 ceramics exerts a great influence on the pyroelectric properties.
The infrared sensor using this ceramic has been fabricated by hybrid IC technique. The low temperature fired ceramic substrate was used by the advantage of its remarkably low thermal conductivity. The sensor can operate without the load resistance of the pyroelectric element. The maximum responsivity Rv value versus chopping frequency is obtained i a less than 1 Hz frequency range. Responsivity Rv and specific detectivity D* are 780 V/W and 1.1×108cm √Hz/W at 1 Hz, respectively. The sensor is applicable for human body sensing.

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© The Illuminating Engineering Institute of Japan
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