High pyroelectric response in Pb <sub>0.99</sub> Nb <sub>0.02</sub> [(Zr <sub>0.57</sub> Sn <sub>0.43</sub> ) <sub>1−</sub> <i> <sub>x</sub> </i> Ti <i> <sub>x</sub> </i> ] <sub>0.98</sub> O <sub>3</sub> ceramics
Ling Li, Yuxin Dai, Xiaolong Tang, Shuhao Wang, Jiajia Wang, Yaojin Wang
Abstract
Abstract Both high pyroelectric coefficient and figure of merits of ferroelectric materials are desirable for infrared detection. In this work, we prepared Pb 0.99 Nb 0.02 [(Zr 0.57 Sn 0.43 ) 1− x Ti x ] 0.98 O 3 (0.060 ≤ x ≤ 0.080) ceramics, and the microstructure and electric properties were studied systematically. It is observed that the composition x = 0.07 shows enhanced pyroelectric properties around ambient temperature due to the ferroelectric–antiferroelectric phase transition, with the pyroelectric coefficient p = 6.83 × 10 −4 C m −2 K −1 and the figures of merit F i = 5.04 × 10 −10 m V −1 , F v = 7.61 × 10 −2 m 2 C −1 , and F d = 3.46 × 10 −5 Pa −1/2 at room temperature and the highest pyroelectric coefficient of 695.5 × 10 −4 C m −2 K −1 and F i = 1410.46 × 10 −10 m V −1 , F v = 1587.39 × 10 −2 m 2 C −1 , and F d = 1182.94 × 10 −5 Pa −1/2 at 36.7°C. These values are superior to other pyroelectric materials. These results indicate that this system is a promising pyroelectric material for the applications of infrared detectors.