TY - JOUR
T1 - Large electric-induced pyroelectric properties in (Pb0.87La 0.02Ba0.1) (Zr0.7Sn0.24Ti 0.06)O3 antiferroelectric ceramics with excess PbO
AU - Zhang, Qingfeng
AU - Jiang, Shenglin
AU - Zeng, Yike
AU - Fan, Maoyan
AU - Zhang, Guangzu
AU - Zhang, Yangyang
AU - Yu, Yan
AU - Wang, Jing
AU - He, Jungang
PY - 2011/6/15
Y1 - 2011/6/15
N2 - (Pb0.87La0.02Ba0.1) (Zr 0.7Sn0.24Ti0.06)O3 (PLBZST) antiferroelectric ceramics with the addition of 0-9 wt. excess PbO were fabricated by the conventional solid-state reaction process, and their microstructure, dielectric, and pyroelectric properties were systemically investigated. When excess PbO content was less than 9 wt. , two pyrochlore phases were formed along with the perovskite phase. Compared with common specimens, PLBZST antiferroelectric ceramics with excess PbO exhibited a higher pyroelectric coefficient and a lower dielectric loss, which are beneficial for the development of pyroelectric devices. Around the Curie temperature, as the excess PbO increased from 0 wt. to 9 wt. , PLBZST ceramics' pyroelectric coefficient increased from 1600 μC/m2K to 4000 μC/m 2K, and the figure of merit increased from 40× 10-5 Pa-0.5 to 140 ×10-5 Pa-0.5 under a 400 V/mm dc field. The largest figure of merit of 200 10-5 Pa -0.5, which is about 8 times higher than that of conventional phase transition materials barium strontium titanate (BST), was obtained in PLBZST ceramics with 6 wt. excess PbO when a 600 V/mm dc bias field was applied. Therefore, improvement of pyroelectric property is beneficial for the development of infrared detectors.
AB - (Pb0.87La0.02Ba0.1) (Zr 0.7Sn0.24Ti0.06)O3 (PLBZST) antiferroelectric ceramics with the addition of 0-9 wt. excess PbO were fabricated by the conventional solid-state reaction process, and their microstructure, dielectric, and pyroelectric properties were systemically investigated. When excess PbO content was less than 9 wt. , two pyrochlore phases were formed along with the perovskite phase. Compared with common specimens, PLBZST antiferroelectric ceramics with excess PbO exhibited a higher pyroelectric coefficient and a lower dielectric loss, which are beneficial for the development of pyroelectric devices. Around the Curie temperature, as the excess PbO increased from 0 wt. to 9 wt. , PLBZST ceramics' pyroelectric coefficient increased from 1600 μC/m2K to 4000 μC/m 2K, and the figure of merit increased from 40× 10-5 Pa-0.5 to 140 ×10-5 Pa-0.5 under a 400 V/mm dc field. The largest figure of merit of 200 10-5 Pa -0.5, which is about 8 times higher than that of conventional phase transition materials barium strontium titanate (BST), was obtained in PLBZST ceramics with 6 wt. excess PbO when a 600 V/mm dc bias field was applied. Therefore, improvement of pyroelectric property is beneficial for the development of infrared detectors.
UR - http://www.scopus.com/inward/record.url?scp=79960193197&partnerID=8YFLogxK
U2 - 10.1063/1.3596577
DO - 10.1063/1.3596577
M3 - Article
AN - SCOPUS:79960193197
SN - 0021-8979
VL - 109
JO - Journal of Applied Physics
JF - Journal of Applied Physics
IS - 12
M1 - 124111
ER -