Thakre, Atul Maurya, Deepam Kim, Do Yoen Kim, Yunseok Sriboriboon, Panithan Yoo, Il-Ryeol Priya, Shashank Cho, Kyung-Hoon Song, Hyun-Cheol Ryu, Jungho 2024-01-19T15:03:11Z 2024-01-19T15:03:11Z 2021-09-05 2021-04 0955-2219 https://pubs.kist.re.kr/handle/201004/117212 Enhanced pyroelectric response is achieved via domain engineering from [001] grain-oriented, tetragonal-phase, lead-free 0.2(2/3K(0.5)Bi(0.5)TiO(3)-1/3BaTiO(3))-0.8Na(0.5)Bi(0.5)TiO(3) (KBT-BT-NBT) ceramics prepared by a templated grain growth method. The [001] crystallographic orientation leads to large polarization in tetragonal symmetry; therefore, texturing along this direction is employed to enhance the pyroelectricity. X-ray diffraction analysis revealed a Lotgering factor (degree of texturing) of 93 % along the [001] crystallographic direction. The textured KBT-BT-NBT lead-free ceramics showed comparable pyroelectric figures of merit to those of lead-based ferroelectric materials at room temperature (RT). In addition to the enhanced pyroelectric response at RT, an enormous enhancement in the pyroelectric response (from 1750 to 90,900 mu C m(-2) K-1) was achieved at the depolarization temperature because of the sharp ferroelectric to antiferroelectric phase transition owing to coherent 180 degrees domain switching. These results will motivate the development of a wide range of lead-free pyroelectric devices, such as thermal sensors and infra-red detectors. English ELSEVIER SCI LTD Enhanced pyroelectric response from domain-engineered lead-free (K0.5Bi0.5TiO3-BaTiO3)-Na0.5Bi0.5TiO3 ferroelectric ceramics Article 10.1016/j.jeurceramsoc.2020.11.013 1 JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, v.41, no.4, pp.2524 - 2532 JOURNAL OF THE EUROPEAN CERAMIC SOCIETY 41 4 2524 2532 scie scopus 000613758100004 2-s2.0-85097048938 Materials Science, Ceramics Materials Science Article Pyroelectric Lead-free material Texturing Template grain growth Ferroelectric phase transition