Large electric-induced pyroelectric properties in (Pb0.87La 0.02Ba0.1) (Zr0.7Sn0.24Ti 0.06)O3 antiferroelectric ceramics with excess PbO

Qingfeng Zhang, Shenglin Jiang*, Yike Zeng, Maoyan Fan, Guangzu Zhang, Yangyang Zhang, Yan Yu, Jing Wang, Jungang He

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

20 Citations (Scopus)

Abstract

(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.

Original languageEnglish
Article number124111
JournalJournal of Applied Physics
Volume109
Issue number12
DOIs
Publication statusPublished - 15 Jun 2011
Externally publishedYes

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