Title :
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
Abstract :
Mn+Y co-doped Ba0.67Sr0.33TiO3 (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 εr = 2850, dielectric loss tan δ = 0.0137, remnant polarization Pr = 7.3 μC/cm2, intrinsic pyroelectric coefficient γint = 570 nC/cm2 K, and the maximum figure of merit of detectivity FD =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; Ba0.67Sr0.33TiO3: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;
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
DOI :
10.1109/ISAF.2011.6014129
