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...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2020
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| Online Access: | http://psasir.upm.edu.my/id/eprint/86915/1/Non-ferroelectric%20relaxor.pdf |
| _version_ | 1825952286591942656 |
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| author | Tan, Phei Yi Tan, Kar Ban Khaw, Chwin Chieh Zainal, Zulkarnain Chen, Soo Kien Lee, Oon Jew Chon, Mun Ping |
| 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 |
| collection | UPM |
| description | 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 |
| first_indexed | 2024-03-06T10:42:40Z |
| format | Article |
| id | upm.eprints-86915 |
| institution | Universiti Putra Malaysia |
| language | English |
| last_indexed | 2024-03-06T10:42:40Z |
| publishDate | 2020 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | 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 |
| spellingShingle | 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 |
| title | 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_short | 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 |
| url | http://psasir.upm.edu.my/id/eprint/86915/1/Non-ferroelectric%20relaxor.pdf |
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