Non-ferroelectric relaxor properties of BMN, Bi3.55Mg1.78Nb2.67O13.78 pyrochlore
Phase-pure Bi3.55Mg1.78Nb2.67O13.78, BMN pyrochlore was prepared by conventional solid-state reaction at 1025 °C for 2–3 days. Electrical properties measured by impedance spectroscopy over the range 10–1073 K showed relaxor behaviour with a maximum dielectric constant, ε′max of 209 at its temperatur...
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my.upm.eprints.869152022-01-07T08:27:37Z http://psasir.upm.edu.my/id/eprint/86915/ Non-ferroelectric relaxor properties of BMN, Bi3.55Mg1.78Nb2.67O13.78 pyrochlore Tan, Phei Yi Tan, Kar Ban Khaw, Chwin Chieh Zainal, Zulkarnain Chen, Soo Kien Lee, Oon Jew Chon, Mun Ping Phase-pure Bi3.55Mg1.78Nb2.67O13.78, BMN pyrochlore was prepared by conventional solid-state reaction at 1025 °C for 2–3 days. Electrical properties measured by impedance spectroscopy over the range 10–1073 K showed relaxor behaviour with a maximum dielectric constant, ε′max of 209 at its temperature maximum, Tmax of 204 K. Impedance data were analysed by fixed-frequency sweeps of dielectric constant and tan δ and variable frequency scans at fixed temperature. Low temperature data were modelled using the classic dielectric relaxation circuit that consists of a resistance in combination with series and parallel capacitances, but modified to include a constant phase element that introduced variable resistances and capacitances into the equivalent circuit. There was no evidence of ferroelectric behaviour, either from extrapolation of high temperature Curie-Weiss plots or the temperature-dependence of low temperature capacitance data. At intermediate temperatures, ∼240–623 K, BMN is an insulator with resistivity >10 MΩ cm. Above ∼623 K, it is a modest electrical conductor, activation energy 1.07 eV; the charge carriers are probably oxide ions. TAN KAR BAN// CHON MUN PING, TAN PHEI YI, CHEN SOO KIEN, ZULKARNAIN BIN ZAINAL/ Khaw Chwin Chieh,Lee Onn Jew Elsevier 2020-03-05 Article PeerReviewed text en http://psasir.upm.edu.my/id/eprint/86915/1/Non-ferroelectric%20relaxor.pdf Tan, Phei Yi and Tan, Kar Ban and Khaw, Chwin Chieh and Zainal, Zulkarnain and Chen, Soo Kien and Lee, Oon Jew and Chon, Mun Ping (2020) Non-ferroelectric relaxor properties of BMN, Bi3.55Mg1.78Nb2.67O13.78 pyrochlore. Journal of Alloys and Compounds, 816. art. no. 152576. pp. 1-11. ISSN 0925-8388 https://www.sciencedirect.com/science/article/abs/pii/S0925838819338228 10.1016/j.jallcom.2019.152576 |
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Phase-pure Bi3.55Mg1.78Nb2.67O13.78, BMN pyrochlore was prepared by conventional solid-state reaction at 1025 °C for 2–3 days. Electrical properties measured by impedance spectroscopy over the range 10–1073 K showed relaxor behaviour with a maximum dielectric constant, ε′max of 209 at its temperature maximum, Tmax of 204 K. Impedance data were analysed by fixed-frequency sweeps of dielectric constant and tan δ and variable frequency scans at fixed temperature. Low temperature data were modelled using the classic dielectric relaxation circuit that consists of a resistance in combination with series and parallel capacitances, but modified to include a constant phase element that introduced variable resistances and capacitances into the equivalent circuit. There was no evidence of ferroelectric behaviour, either from extrapolation of high temperature Curie-Weiss plots or the temperature-dependence of low temperature capacitance data. At intermediate temperatures, ∼240–623 K, BMN is an insulator with resistivity >10 MΩ cm. Above ∼623 K, it is a modest electrical conductor, activation energy 1.07 eV; the charge carriers are probably oxide ions.
TAN KAR BAN// CHON MUN PING, TAN PHEI YI, CHEN SOO KIEN, ZULKARNAIN BIN ZAINAL/ Khaw Chwin Chieh,Lee Onn Jew |
format |
Article |
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Tan, Phei Yi Tan, Kar Ban Khaw, Chwin Chieh Zainal, Zulkarnain Chen, Soo Kien Lee, Oon Jew Chon, Mun Ping |
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Tan, Phei Yi Tan, Kar Ban Khaw, Chwin Chieh Zainal, Zulkarnain Chen, Soo Kien Lee, Oon Jew Chon, Mun Ping Non-ferroelectric relaxor properties of BMN, Bi3.55Mg1.78Nb2.67O13.78 pyrochlore |
author_facet |
Tan, Phei Yi Tan, Kar Ban Khaw, Chwin Chieh Zainal, Zulkarnain Chen, Soo Kien Lee, Oon Jew Chon, Mun Ping |
author_sort |
Tan, Phei Yi |
title |
Non-ferroelectric relaxor properties of BMN, Bi3.55Mg1.78Nb2.67O13.78 pyrochlore |
title_short |
Non-ferroelectric relaxor properties of BMN, Bi3.55Mg1.78Nb2.67O13.78 pyrochlore |
title_full |
Non-ferroelectric relaxor properties of BMN, Bi3.55Mg1.78Nb2.67O13.78 pyrochlore |
title_fullStr |
Non-ferroelectric relaxor properties of BMN, Bi3.55Mg1.78Nb2.67O13.78 pyrochlore |
title_full_unstemmed |
Non-ferroelectric relaxor properties of BMN, Bi3.55Mg1.78Nb2.67O13.78 pyrochlore |
title_sort |
non-ferroelectric relaxor properties of bmn, bi3.55mg1.78nb2.67o13.78 pyrochlore |
publisher |
Elsevier |
publishDate |
2020 |
url |
http://psasir.upm.edu.my/id/eprint/86915/1/Non-ferroelectric%20relaxor.pdf http://psasir.upm.edu.my/id/eprint/86915/ https://www.sciencedirect.com/science/article/abs/pii/S0925838819338228 |
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