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

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7 Author(s)
Zunping Xu ; Coll. of Mater. Sci. & Eng., Sichuan Univ., Chengdu, China ; Xiaolong Chen ; Dongxu Yan ; Hong Liu
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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.

Published in:

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

Date of Conference:

24-27 July 2011