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Title: | Low-temperature-sintered Pr-doped 0.93(Bi0.5Na0.5)TiO3-0.07BaTiO3 multifunctional ceramics with Li2CO3 sintering aid | Authors: | Chung, TH Kwok, KW |
Issue Date: | 15-Mar-2018 | Source: | Journal of alloys and compounds, 15 Mar. 2018, v. 737, p. 317-322 | Abstract: | Multifunctional ceramics with good dielectric, ferroelectric, piezoelectric and photoluminescence properties have been fabricated at a low sintering temperature of 960 °C. Via the addition of Li2CO3, oxygen vacancies are produced in the Pr-doped 0.93(Bi0.5Na0.5)TiO3-0.07BaTiO3 ceramics, which can enhance the ionic lattice-diffusion coefficient, promote the densification and thus lower the sintering temperature effectively from 1200 to 960 °C. The Li-addition also induces lattice distortion and expansion, which strengthen the internal field among the polar nano-regions of the ceramic. As a result, the depolarization temperature is increased and the room-temperature piezoelectric properties are enhanced. Moreover, the structural symmetry is reduced, and thus leading to an increase in the uneven components of the crystal fields around Pr3+ and then an enhancement in photoluminescence emissions. Together with the good dielectric properties assured by the dense structure, the ceramics are ready for use in multifunctional optoelectronic applications. | Keywords: | Ferroelectrics Photoluminescence Piezoelectric properties Pr-doped BNTBT Sintering aid |
Publisher: | Elsevier | Journal: | Journal of alloys and compounds | ISSN: | 0925-8388 0925-8388 |
EISSN: | 1873-4669 | DOI: | 10.1016/j.jallcom.2017.11.355 | Rights: | © 2017 Elsevier B.V. All rights reserved. © 2017. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/. The following publication Chung, T. H., & Kwok, K. W. (2018). Low-temperature-sintered Pr-doped 0.93 (Bi0. 5Na0. 5) TiO3-0.07 BaTiO3 multifunctional ceramics with Li2CO3 sintering aid. Journal of Alloys and Compounds, 737, 317-322 is available at https://doi.org/10.1016/j.jallcom.2017.11.355. |
Appears in Collections: | Journal/Magazine Article |
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Chung_Low-Temperature-Sintered_Pr-Doped_Ceramics.pdf | Pre-Published version | 1.27 MB | Adobe PDF | View/Open |
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