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Temperature dependence of dielectric properties for BFO-BTO-BZT ceramics |
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| รหัสดีโอไอ | |
| Creator | Sujitra UNRUAN |
| Title | Temperature dependence of dielectric properties for BFO-BTO-BZT ceramics |
| Contributor | Muangjai UNRUAN, Rattikorn YIMNIRUN |
| Publisher | Metallurgy and Materials Science Research Institute, Chulalongkorn University |
| Publication Year | 2561 |
| Journal Title | Journal of Metals, Materials and Minerals |
| Journal Vol. | 28 |
| Journal No. | 2 |
| Page no. | 83-88 |
| Keyword | BFO-BTO-BZT, Ferromagnetism, Dielectric properties |
| URL Website | http://ojs.materialsconnex.com/index.php/jmmm/index |
| Website title | Journal of Metals, Materials and Minerals |
| ISSN | 08576149;26300508 |
| Abstract | In this work, bismuth ferrite-barium titanate-barium zirconate titanate (BFO-BTO-BZT) ceramics were prepared using conventional solid state reaction method. The (1-x)BiFeO3-xBaTiO3 at x = 0.24-0.30 and Ba(Zr,Ti)O3 (Zr = 0.5) systems were separately prepared and calcined at 800 and 1250oC, respectively. All pallets were sintered at temperature of 1100oC. After that, the relationship between phase formation, dielectric and magnetic properties were examined. The XRD patterns revealed that more structural symmetry could be observed in all single-phase perovskite ceramics when more BTO concentration was added. The 0.75(0.70BFO-0.30BTO)-0.25BZT ceramic showed highest dielectric constant with high loss measured at low frequency observed, possibly due to space charges, interfacial and dipolar polarizations. The temperature-dependent dielectric properties of BFO-BTO-BZT solid solutions were measured in TN temperature range. It was found that the addition of BTO content affected the position of TN. Especially, the BFO-BTO-BZT solid solutions successfully improved the magnetic properties of BFO-BTO with typical ferromagnetic hysteresis loops. The maximum Mr with 0.1632 emuทg-1 was observed in 0.75(0.72BFO-0.28BTO)-0.25BZT sample. |
