Effect of the processing parameters on the crystalline structure of lanthanide orthotantalates
Autor(a) principal: | |
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Data de Publicação: | 2014 |
Outros Autores: | |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Materials research (São Carlos. Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392014000700027 |
Resumo: | The influence of the synthesis parameters on the crystalline structures of orthotantalate ceramics has been investigated. Powder materials were prepared by the solid-state reaction route. X-ray diffraction and Raman scattering measurements were employed to investigate the crystal structure of the produced materials. In this work, we analyzed three different examples in which the temperature and time were decisive on the final crystal structure of LnTaO4 compounds besides the lanthanide ionic size. Firstly, the thermal evolution for NdTaO4 samples showed that mixed crystal phases are formed up to 1100 ºC, while well-crystallized M-NdTaO4 (I2/a) materials are obtained in temperatures higher than 1200 ºC. Also, the influence of the synthesis time was investigated for the LaTaO4 ceramics: it was necessary 14 h to obtain samples in the P2(1)/c structure. Finally, two polymorphs could be obtained for the DyTaO4 ceramics: P2/a and I2/a space groups were obtained at 1300 ºC and 1500 ºC, respectively. This study indicated that the temperature, time and lanthanide size are directly correlated with the crystalline arrangement of the orthotantalate materials. |
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Effect of the processing parameters on the crystalline structure of lanthanide orthotantalatessolid-state processinglanthanide orthotantalatescrystal structureRaman spectroscopyThe influence of the synthesis parameters on the crystalline structures of orthotantalate ceramics has been investigated. Powder materials were prepared by the solid-state reaction route. X-ray diffraction and Raman scattering measurements were employed to investigate the crystal structure of the produced materials. In this work, we analyzed three different examples in which the temperature and time were decisive on the final crystal structure of LnTaO4 compounds besides the lanthanide ionic size. Firstly, the thermal evolution for NdTaO4 samples showed that mixed crystal phases are formed up to 1100 ºC, while well-crystallized M-NdTaO4 (I2/a) materials are obtained in temperatures higher than 1200 ºC. Also, the influence of the synthesis time was investigated for the LaTaO4 ceramics: it was necessary 14 h to obtain samples in the P2(1)/c structure. Finally, two polymorphs could be obtained for the DyTaO4 ceramics: P2/a and I2/a space groups were obtained at 1300 ºC and 1500 ºC, respectively. This study indicated that the temperature, time and lanthanide size are directly correlated with the crystalline arrangement of the orthotantalate materials.ABM, ABC, ABPol2014-08-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392014000700027Materials Research v.17 suppl.1 2014reponame:Materials research (São Carlos. Online)instname:Universidade Federal de São Carlos (UFSCAR)instacron:ABM ABC ABPOL10.1590/S1516-14392013005000189info:eu-repo/semantics/openAccessSiqueira,Kisla P. F.Dias,Andersoneng2015-11-06T00:00:00Zoai:scielo:S1516-14392014000700027Revistahttp://www.scielo.br/mrPUBhttps://old.scielo.br/oai/scielo-oai.phpdedz@power.ufscar.br1980-53731516-1439opendoar:2015-11-06T00:00Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR)false |
dc.title.none.fl_str_mv |
Effect of the processing parameters on the crystalline structure of lanthanide orthotantalates |
title |
Effect of the processing parameters on the crystalline structure of lanthanide orthotantalates |
spellingShingle |
Effect of the processing parameters on the crystalline structure of lanthanide orthotantalates Siqueira,Kisla P. F. solid-state processing lanthanide orthotantalates crystal structure Raman spectroscopy |
title_short |
Effect of the processing parameters on the crystalline structure of lanthanide orthotantalates |
title_full |
Effect of the processing parameters on the crystalline structure of lanthanide orthotantalates |
title_fullStr |
Effect of the processing parameters on the crystalline structure of lanthanide orthotantalates |
title_full_unstemmed |
Effect of the processing parameters on the crystalline structure of lanthanide orthotantalates |
title_sort |
Effect of the processing parameters on the crystalline structure of lanthanide orthotantalates |
author |
Siqueira,Kisla P. F. |
author_facet |
Siqueira,Kisla P. F. Dias,Anderson |
author_role |
author |
author2 |
Dias,Anderson |
author2_role |
author |
dc.contributor.author.fl_str_mv |
Siqueira,Kisla P. F. Dias,Anderson |
dc.subject.por.fl_str_mv |
solid-state processing lanthanide orthotantalates crystal structure Raman spectroscopy |
topic |
solid-state processing lanthanide orthotantalates crystal structure Raman spectroscopy |
description |
The influence of the synthesis parameters on the crystalline structures of orthotantalate ceramics has been investigated. Powder materials were prepared by the solid-state reaction route. X-ray diffraction and Raman scattering measurements were employed to investigate the crystal structure of the produced materials. In this work, we analyzed three different examples in which the temperature and time were decisive on the final crystal structure of LnTaO4 compounds besides the lanthanide ionic size. Firstly, the thermal evolution for NdTaO4 samples showed that mixed crystal phases are formed up to 1100 ºC, while well-crystallized M-NdTaO4 (I2/a) materials are obtained in temperatures higher than 1200 ºC. Also, the influence of the synthesis time was investigated for the LaTaO4 ceramics: it was necessary 14 h to obtain samples in the P2(1)/c structure. Finally, two polymorphs could be obtained for the DyTaO4 ceramics: P2/a and I2/a space groups were obtained at 1300 ºC and 1500 ºC, respectively. This study indicated that the temperature, time and lanthanide size are directly correlated with the crystalline arrangement of the orthotantalate materials. |
publishDate |
2014 |
dc.date.none.fl_str_mv |
2014-08-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392014000700027 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-14392014000700027 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1516-14392013005000189 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
ABM, ABC, ABPol |
publisher.none.fl_str_mv |
ABM, ABC, ABPol |
dc.source.none.fl_str_mv |
Materials Research v.17 suppl.1 2014 reponame:Materials research (São Carlos. Online) instname:Universidade Federal de São Carlos (UFSCAR) instacron:ABM ABC ABPOL |
instname_str |
Universidade Federal de São Carlos (UFSCAR) |
instacron_str |
ABM ABC ABPOL |
institution |
ABM ABC ABPOL |
reponame_str |
Materials research (São Carlos. Online) |
collection |
Materials research (São Carlos. Online) |
repository.name.fl_str_mv |
Materials research (São Carlos. Online) - Universidade Federal de São Carlos (UFSCAR) |
repository.mail.fl_str_mv |
dedz@power.ufscar.br |
_version_ |
1754212664617205760 |