(Pb0.325Sr0.675)TiO3 (PST) ceramics were prepared by a traditional solid-state reaction technique. The dielectric and enhanced pyroelectricproperties of PST ceramics were investigated under a DC bias field. The dielectricpermittivity and dielectric loss of PST ceramics at Curie temperature were 2.97 × 10−4 and 0.006 without DC bias field, respectively. With a DC electric field of 0–500 V/mm, the maximum pyroelectric coefficient and the largest figure of merit (Fd) of PST ceramics were obtained, about 60 × 10−8 C cm−2 K−1 and 26 × 10−5 Pa−1/2, respectively. PST ceramics with such superior electric field enhanced pyroelectricproperties have the potential for uncooled focal plane array detectors application.
Received 25 March 2012Accepted 10 December 2012Published online 26 December 2012
This work was supported by the National Natural Science Foundation of China (Nos. 10974216 and U0937603), National important basic research project (2012CB619406) and Advance Research Project of Chinese Academy of Sciences (No. CXJJ-11-Q87). David Jenkins was thanked for English modification.