Influence of Mn+Y co-doped on the intrinsic pyroelectricproperties of Ba0.67Sr0.33TiO3 ceramics

Author

Xu, Zunping ; Chen, Xiaolong ; Yan, Dongxu ; Liu, Hong ; Yu, Ping ; Xiao, Dingquan ; Zhu, Jianguo

Author_Institution

Coll. of Mater. Sci. & Eng., Sichuan Univ., Chengdu, China

fYear

2011

fDate

24-27 July 2011

Firstpage

1

Lastpage

3

Abstract

Mn+Y co-doped Ba_0.67Sr_0.33TiO₃ (BST) powders were fabricated by a citrate precursor method. Mn+Y:BST ceramics were prepared by conventional electronic ceramic process. The microstructure and intrinsic pyroelectric properties of the obtained Mn+Y:BST ceramics were investigated. Adopting fine Mn+Y doped BST powders derived from the citrate method was confirmed to be effective in reducing the sintering temperature required for densification. The ceramic specimens sintered at 1250-1300 °C presented relative densities of around 96%. The ceramics sintered at 1280 °C for 3 h attained superior dielectric and pyroelectric properties, giving a dielectric constant ε_r = 2850, dielectric loss tan δ = 0.0137, remnant polarization P_r = 7.3 μC/cm², intrinsic pyroelectric coefficient γ_int = 570 nC/cm² K, and the maximum figure of merit of detectivity F_D =88.1 μPa^-1/2 at 1 kHz, respectively.

Keywords

barium compounds; ceramics; densification; dielectric losses; dielectric polarisation; manganese; permittivity; pyroelectricity; sintering; strontium compounds; yttrium; Ba_0.67Sr_0.33TiO₃:Mn,Y; citrate method; conventional electronic ceramic process; densification; dielectric constant; dielectric loss; dielectric properties; microstructure; pyroelectric properties; remnant polarization; sintering temperature; temperature 1250 degC to 1300 degC; time 3 h; Ceramics; Dielectric losses; Doping; Microstructure; Powders; Titanium compounds; Ceramics; Chemical synthesis; Microstructure; electrical properties;

fLanguage

English

Publisher

ieee

Conference_Titel

Applications of Ferroelectrics (ISAF/PFM), 2011 International Symposium on and 2011 International Symposium on Piezoresponse Force Microscopy and Nanoscale Phenomena in Polar Materials

Conference_Location

Vancouver, BC

Print_ISBN

978-1-4577-1162-6

Electronic_ISBN

978-1-4577-1161-9

Type

conf

DOI

10.1109/ISAF.2011.6014129

Filename

6014129