The decrease of depolarization temperature and the improvement of pyroelectric properties by doping Ta in lead-free 0.94Na0.5Bi0.5TiO3-0.06BaTiO3 ceramics

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dc.contributor.authorBalakt, Ahmed M.
dc.contributor.authorShaw, Christopher P.
dc.contributor.authorZhang, Qi
dc.date.accessioned2017-03-01T14:15:11Z
dc.date.available2017-03-01T14:15:11Z
dc.date.issued2016-12-02
dc.description.abstractTa-doped lead-free 0.94NBT-0.06BT-xTa (x=0.0–1.0%) ceramics were synthesized by a conventional solid-state route. XRD shows that the compositions are at a morphotropic phase boundary where rhombohedral and tetragonal phases coexist. The depolarization temperature (Td) shifted to lower temperature with the increase of Ta content. The pyroelectric coefficient (p) of doped ceramics greatly enhanced compared with undoped material and reached a maximum of 7.14×10−4 C m−2 °C−1 at room temperature (RT) and 146.1×10−4 C m−2 °C−1 at Td at x=0.2%. The figure of merits, Fi and Fv, also showed a great improvement from 1.12×10−10 m v−1 and 0.021 m2 C−1 at x=0.0 to 2.55×10−10 m v−1 and 0.033 m2 C−1 at x=0.2% at RT. Furthermore, Fi and Fv show the huge improvement to 52.2×10−10 m v−1 and 0.48×10−10 m v−1 respectively at Td at x=0.2%. FC shows a value between 2.26 and 2.42 ×10−9 C cm−2 °C−1 at RT at x=0.2%. The improved pyroelectric properties make NBT-0.06BT-0.002Ta ceramics a promising infrared detector material.en_UK
dc.identifier.citationBalakt AM, Shaw CP, Zhang Q, The decrease of depolarization temperature and the improvement of pyroelectric properties by doping Ta in lead-free 0.94Na0.5Bi0.5TiO3-0.06BaTiO3 ceramics, Ceramics International, Volume 43, Issue 4, March 2017, Pages 3726–3733en_UK
dc.identifier.issn0272-8842
dc.identifier.urihttp://dx.doi.org/10.1016/j.ceramint.2016.12.004
dc.identifier.urihttps://dspace.lib.cranfield.ac.uk/handle/1826/11531
dc.language.isoenen_UK
dc.publisherElsevieren_UK
dc.rightsAttribution-NonCommercial-NoDerivatives 4.0 International
dc.rights.urihttp://creativecommons.org/licenses/by-nc-nd/4.0/
dc.subjectLead free ceramicsen_UK
dc.subjectLanthanum doping NBT-BTen_UK
dc.subjectMorphotropic phase boundary (MPB)en_UK
dc.subjectDepolarization temperatureen_UK
dc.subjectPyroelectric propertiesen_UK
dc.subjectFigure of meritsen_UK
dc.titleThe decrease of depolarization temperature and the improvement of pyroelectric properties by doping Ta in lead-free 0.94Na0.5Bi0.5TiO3-0.06BaTiO3 ceramicsen_UK
dc.typeArticleen_UK

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