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| Title: | Bismuth zinc niobate pyrochlore, a relaxor-like non-ferroelectric |
| Authors: | Rozana Aina, Maulat Osman, Dr.
Maso, Nahum
West, Anthony R. |
| E-mail: | rozana@unimap.edu.my |
| Keywords: | Bismuth zinc niobate
Pyrochlore structures
Ferroelectricity
Impedance data
Constant phase element (CPE) |
| Issue Date: | Jan-2012 |
| Publisher: | The American Ceramic Society |
| Citation: | Journal of the American Ceramic Society, vol. 95 (1), 2012, pages 296-302 |
| Abstract: | Fixed frequency plots of ε and tan δ versus temperature for (Bi 1.5Zn 0.5)(Zn 0.5Nb 1.5)O 7 (BZN) ceramics with the pyrochlore structure show relaxor-like response below ∼180 K with frequency-independent permittivity of ∼130 above ∼180 K and over the frequency range of 10 3-10 6 Hz. Impedance data in the range, 10-180 K fit an equivalent circuit derived from the classic dielectric relaxation circuit in which the relaxation resistance is replaced by a constant phase element (CPE). Temperature dependence of the circuit parameters shows that BZN is not ferroelectric; the CPE, which is responsible for the relaxor-like behavior, gradually changes from primarily capacitive to primarily resistive with increasing temperature. |
| Description: | Link to publisher's homepage at http://ceramics.org/ |
| URI: | http://onlinelibrary.wiley.com/doi/10.1111/j.1551-2916.2011.04779.x/pdf
http://hdl.handle.net/123456789/21831 |
| ISSN: | 0002-7820 |
| Appears in Collections: | School of Microelectronic Engineering (Articles)
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