Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 조윌렴 | * |
dc.date.accessioned | 2016-08-28T10:08:55Z | - |
dc.date.available | 2016-08-28T10:08:55Z | - |
dc.date.issued | 2012 | * |
dc.identifier.issn | 1932-7447 | * |
dc.identifier.other | OAK-9329 | * |
dc.identifier.uri | https://dspace.ewha.ac.kr/handle/2015.oak/223108 | - |
dc.description.abstract | We have monitored the phase transformation from a Sandia octahedral molecular sieve Na 2Nb 2O 6-H 2O to a piezoelectric NaNbO 3 nanowire through in situ X-ray diffraction (XRD) and transmission electron microscopy (TEM) measurements at high temperatures. After dehydration at 288 °C, the Na 2Nb 2O 6-H 2O becomes significantly destabilized and transforms into NaNbO 3 with the increase of time. The phase transformation time is exponentially proportional to the inverse of temperature, for example, ∼10 5 s at 300 °C and ∼10 1 s at 500 °C, and follows an Arrhenius equation with the activation energy of 2.0 eV. Real time TEM investigation directly reveals that the phase transformation occurs through a thermally excited atomic rearrangement due to the small difference of Gibbs free energy between two phases. This work may provide a clue of kinetic control for the development of high piezoelectric lead-free alkaline niobates and a deep insight for the crystallization of oxide nanostructures during a hydrothermal process. © 2012 American Chemical Society. | * |
dc.language | English | * |
dc.title | In situ observation of dehydration-induced phase transformation from Na 2Nb 2O 6-H 2O to NaNbO 3 | * |
dc.type | Article | * |
dc.relation.issue | 42 | * |
dc.relation.volume | 116 | * |
dc.relation.index | SCI | * |
dc.relation.index | SCIE | * |
dc.relation.index | SCOPUS | * |
dc.relation.startpage | 22261 | * |
dc.relation.lastpage | 22265 | * |
dc.relation.journaltitle | Journal of Physical Chemistry C | * |
dc.identifier.doi | 10.1021/jp308289r | * |
dc.identifier.wosid | WOS:000310121000019 | * |
dc.identifier.scopusid | 2-s2.0-84867876634 | * |
dc.author.google | Jung J.H. | * |
dc.author.google | Chen C.-Y. | * |
dc.author.google | Wu W.-W. | * |
dc.author.google | Hong J.-I. | * |
dc.author.google | Yun B.K. | * |
dc.author.google | Zhou Y. | * |
dc.author.google | Lee N. | * |
dc.author.google | Jo W. | * |
dc.author.google | Chen L.-J. | * |
dc.author.google | Chou L.-J. | * |
dc.author.google | Wang Z.L. | * |
dc.contributor.scopusid | 조윌렴(7103322276) | * |
dc.date.modifydate | 20240123091004 | * |