dc.contributorUniversidade Estadual Paulista (Unesp)
dc.contributorUniv Paris 11
dc.date.accessioned2014-05-20T15:25:49Z
dc.date.accessioned2022-10-05T16:35:13Z
dc.date.available2014-05-20T15:25:49Z
dc.date.available2022-10-05T16:35:13Z
dc.date.created2014-05-20T15:25:49Z
dc.date.issued2004-10-01
dc.identifierJournal of Sol-gel Science and Technology. Dordrecht: Springer, v. 32, n. 1-3, p. 91-97, 2004.
dc.identifier0928-0707
dc.identifierhttp://hdl.handle.net/11449/36160
dc.identifier10.1007/s10971-004-5771-y
dc.identifierWOS:000228103300016
dc.identifier9971202585286967
dc.identifier5584298681870865
dc.identifier0000-0002-8356-8093
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/3907944
dc.description.abstractThis paper describes the effect of sulfate, phosphate and nitrate complexing ligands on the structural features of amorphous xerogels and on the crystallization of metastable zirconia phases during the xerogel-ceramic conversion. Powdered samples were prepared by a sol-gel route using zirconyl chloride precursors chemically modified by complexing ligands. The structural evolution of ZrO2 phases as function of firing temperature was analyzed by XRPD, EXAFS and P-13 NMR/MAS. The experimental results show the formation of metastable t-ZrO2 during the low firing temperature of xerogels modified by sulfate or phosphate groups. The martensitic tetragonal-monoclinic transformation occurs during desorption of sulfate groups. The largest temperature interval of stability of metastable tetragonal zirconia was observed for phosphate-modified xerogels.
dc.languageeng
dc.publisherSpringer
dc.relationJournal of Sol-Gel Science and Technology
dc.relation1.745
dc.relation0,477
dc.rightsAcesso restrito
dc.sourceWeb of Science
dc.subjectsol-gel process
dc.subjectzirconia tetragonal phase
dc.titleStructural features of phosphate and sulfate modified zirconia prepared by sol-gel route
dc.typeArtigo


Este ítem pertenece a la siguiente institución