| dc.contributor | Universidade Estadual Paulista (UNESP) | |
| dc.creator | Freitas, G. F. G. | |
| dc.creator | Nasar, R. S. | |
| dc.creator | Cerqueira, M. | |
| dc.creator | Melo, D. M. A. | |
| dc.creator | Longo, Elson | |
| dc.creator | Varela, José Arana | |
| dc.date | 2014-05-20T15:23:24Z | |
| dc.date | 2016-10-25T17:57:20Z | |
| dc.date | 2014-05-20T15:23:24Z | |
| dc.date | 2016-10-25T17:57:20Z | |
| dc.date | 2006-10-25 | |
| dc.date.accessioned | 2017-04-05T23:41:49Z | |
| dc.date.available | 2017-04-05T23:41:49Z | |
| dc.identifier | Materials Science and Engineering A-structural Materials Properties Microstructure and Processing. Lausanne: Elsevier B.V. Sa, v. 434, n. 1-2, p. 19-22, 2006. | |
| dc.identifier | 0921-5093 | |
| dc.identifier | http://hdl.handle.net/11449/34188 | |
| dc.identifier | http://acervodigital.unesp.br/handle/11449/34188 | |
| dc.identifier | 10.1016/j.msea.2006.07.023 | |
| dc.identifier | WOS:000240896400004 | |
| dc.identifier | http://dx.doi.org/10.1016/j.msea.2006.07.023 | |
| dc.identifier.uri | http://repositorioslatinoamericanos.uchile.cl/handle/2250/878160 | |
| dc.description | This paper aims to describe the synthesis of the semi-crystalline and crystalline powder of lanthanum doped with zirconium titanate (65/35), LZT through Pechini method. The analysis done by Raman demonstrated that semi-crystalline phase at 550 degrees C and crystalline phase after 600 degrees C were formed. The XRD pattern shows the ZrTiO4 phase formation demonstrating that La substitutions into the lattice take place. The calcined powder at different temperatures shows a semi-crystalline phase presenting photoluminescence effect when processed at low temperatures. From 300 to 400 degrees C a broadband is observed at 563 nm and 568 nm, respectively. Defects creation such as: Zr3+ center dot Vo(center dot center dot) and Ti3+ - V-O(center dot center dot), Zr and Ti replaced by La with vacancy formation, impurities and imperfections contributed to the photoluminescence effect. However, the main emission is due to a reverse Ti4+ -> O2- or/and Zr4+ -> O2- transition that occur within a regular titanate or zirconate eight-fold coordination [BO8-delta], B = Zr4+, Ti4+. (c) 2006 Elsevier B.V. All rights reserved. | |
| dc.language | eng | |
| dc.publisher | Elsevier B.V. | |
| dc.relation | Materials Science and Engineering A: Structural Materials Properties Microstructure and Processing | |
| dc.rights | info:eu-repo/semantics/closedAccess | |
| dc.subject | photoluminescence | |
| dc.subject | amorphous materials | |
| dc.subject | Pechini method | |
| dc.title | Luminescence in semi-crystalline zirconium titanate doped with lanthanum | |
| dc.type | Otro | |
