dc.contributor | CV Raman College of Engineering | |
dc.contributor | CCN-Química | |
dc.contributor | Institute of Minerals and Materials Technology | |
dc.contributor | Universidade Estadual Paulista (Unesp) | |
dc.date.accessioned | 2014-05-27T11:30:31Z | |
dc.date.available | 2014-05-27T11:30:31Z | |
dc.date.created | 2014-05-27T11:30:31Z | |
dc.date.issued | 2013-09-01 | |
dc.identifier | Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, v. 44, n. 9, p. 4296-4309, 2013. | |
dc.identifier | 1073-5623 | |
dc.identifier | http://hdl.handle.net/11449/76387 | |
dc.identifier | 10.1007/s11661-013-1770-3 | |
dc.identifier | WOS:000322321600030 | |
dc.identifier | 2-s2.0-84881084800 | |
dc.description.abstract | In the current article, we studied the effect of yttrium [Y3+] ions' substitution on the structure and electric behavior of barium zirconate titanate (BZT) ceramics with a general formula [Ba1-x Y 2x/3](Zr0.25Ti0.75)O3 (BYZT) with [x = 0, 0.025, 0.05] which were prepared by the solid-state reaction method. X-ray diffraction patterns indicate that these ceramics have a single phase with a perovskite-type cubic structure. Rietveld refinement data confirmed [BaO 12], [ZrO6], [TiO6], [YO6] clusters in the cubic lattice. The Y3+ ions' effects on the electric conductivity behavior of BZT ceramics as a function of temperature and frequency are described, which are based on impedance spectroscopy analyses. The complex impedance plots display a double semicircle which highlights the influences of grain and grain boundary on the ceramics. Impedance analyses showed that the resistance decreased with the increasing temperature and resulted in a negative temperature coefficient of the resistance property in all compositions. Modulus plots represent a non-Debye-type dielectric relaxation which is related to the grain and grain boundary as well as temperature-dependent electric relaxation phenomenon and an enhancement in the mobility barrier by Y3+ ions. Moreover, the electric conductivity increases with the replacement of Ba 2+ by Y3+ ions may be due to the rise in oxygen vacancies. © 2013 The Minerals, Metals & Materials Society and ASM International. | |
dc.language | eng | |
dc.relation | Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science | |
dc.relation | 1.887 | |
dc.relation | 1,093 | |
dc.rights | Acesso restrito | |
dc.source | Scopus | |
dc.subject | Barium zirconate titanates | |
dc.subject | Complex impedance plots | |
dc.subject | Impedance spectroscopy | |
dc.subject | Increasing temperatures | |
dc.subject | Relaxation phenomena | |
dc.subject | Resistance properties | |
dc.subject | Solid state reaction method | |
dc.subject | Temperature dependent | |
dc.subject | Barium zirconate | |
dc.subject | Ceramic materials | |
dc.subject | Electric conductivity | |
dc.subject | Electric conductivity measurement | |
dc.subject | Grain boundaries | |
dc.subject | Ions | |
dc.subject | Rietveld refinement | |
dc.subject | Solid state reactions | |
dc.subject | Structural ceramics | |
dc.subject | Titanium compounds | |
dc.subject | X ray diffraction | |
dc.subject | Yttrium | |
dc.subject | Zirconium | |
dc.subject | Yttrium alloys | |
dc.title | Effect of yttrium doping in barium zirconium titanate ceramics: A structural, impedance, modulus spectroscopy study | |
dc.type | Artículos de revistas | |