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Title: A sol-gel route for the development of rare-earth aluminum borate nanopowders and transparent thin films

Abstract

A new sol-gel route was applied to obtain Y{sub 0.9}Er{sub 0.1}Al{sub 3}(BO{sub 3}){sub 4} crystalline powders and amorphous thin films by using Al(acac){sub 3}, B(OPr {sup i}){sub 3}, Y(NO{sub 3}){sub 3}.6H{sub 2}O, and Er(NO{sub 3}){sub 3}.5H{sub 2}O as starting materials dissolved in propionic acid and ethyl alcohol mixtures. Our study shows that propionic acid acts as good chelant agent for yttrium and erbium ions while ethyl alcohol allows to dissolve Al(acac){sub 3}. This process makes the resulting sols very stable to obtain homogeneous gels and transparent amorphous thin films. In addition, the propionic acid prevents the sol precipitation, making easy porous- and crack-free thin film depositions. Chemical reactions involved in the complexation were discussed. As-prepared powders and films are amorphous and present a good thermal stability due to their high glass transition (746 deg. C) and crystallization temperatures (830 deg. C). This new sol-gel route showed to be adequate to obtain dense and crack-free thin films free of organic and hydroxyl groups that can be considered as promising materials to be used in integrated optical systems. - Graphical abstract: SEM micrograph of Y{sub 0.9}Er{sub 0.1}Al{sub 3}(BO{sub 3}){sub 4} powders calcined at 400 and 700 deg. C during 24 h andmore » heat-treated at 1150 deg. C.« less

Authors:
 [1];  [2];  [1];  [3];  [1];  [3]
  1. Grupo Crescimento de Cristais e Materiais Ceramicos, Instituto de Fisica de Sao Carlos-Universidade de Sao Paulo, Caixa Postal 369, 13560-970 Sao Carlos/SP (Brazil)
  2. (France), E-mail: lauro@if.sc.usp.br
  3. Laboratoire de Cristallographie, CNRS, UPR 5031, associe a l'Universite Joseph Fourier-Grenoble et a l'INPG, 25 Avenue des Martyrs, BP 166, 38042 Grenoble (France)
Publication Date:
OSTI Identifier:
21015691
Resource Type:
Journal Article
Resource Relation:
Journal Name: Journal of Solid State Chemistry; Journal Volume: 180; Journal Issue: 2; Other Information: DOI: 10.1016/j.jssc.2006.11.016; PII: S0022-4596(06)00599-8; Copyright (c) 2006 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL AND ANALYTICAL CHEMISTRY; ALUMINIUM COMPOUNDS; BORATES; CRYSTALLIZATION; DEPOSITION; ERBIUM NITRATES; ETHANOL; HEAT TREATMENTS; OPTICAL SYSTEMS; POROUS MATERIALS; PRECIPITATION; PROPIONIC ACID; SCANNING ELECTRON MICROSCOPY; SOL-GEL PROCESS; TEMPERATURE RANGE 0400-1000 K; TEMPERATURE RANGE 1000-4000 K; THERMAL ANALYSIS; THIN FILMS; X-RAY DIFFRACTION; YTTRIUM NITRATES

Citation Formats

Maia, Lauro J.Q., Laboratoire de Cristallographie, CNRS, UPR 5031, associe a l'Universite Joseph Fourier-Grenoble et a l'INPG, 25 Avenue des Martyrs, BP 166, 38042 Grenoble, Mastelaro, Valmor R., Pairis, Sebastien, Hernandes, Antonio C., and Ibanez, Alain. A sol-gel route for the development of rare-earth aluminum borate nanopowders and transparent thin films. United States: N. p., 2007. Web. doi:10.1016/j.jssc.2006.11.016.
Maia, Lauro J.Q., Laboratoire de Cristallographie, CNRS, UPR 5031, associe a l'Universite Joseph Fourier-Grenoble et a l'INPG, 25 Avenue des Martyrs, BP 166, 38042 Grenoble, Mastelaro, Valmor R., Pairis, Sebastien, Hernandes, Antonio C., & Ibanez, Alain. A sol-gel route for the development of rare-earth aluminum borate nanopowders and transparent thin films. United States. doi:10.1016/j.jssc.2006.11.016.
Maia, Lauro J.Q., Laboratoire de Cristallographie, CNRS, UPR 5031, associe a l'Universite Joseph Fourier-Grenoble et a l'INPG, 25 Avenue des Martyrs, BP 166, 38042 Grenoble, Mastelaro, Valmor R., Pairis, Sebastien, Hernandes, Antonio C., and Ibanez, Alain. Thu . "A sol-gel route for the development of rare-earth aluminum borate nanopowders and transparent thin films". United States. doi:10.1016/j.jssc.2006.11.016.
@article{osti_21015691,
title = {A sol-gel route for the development of rare-earth aluminum borate nanopowders and transparent thin films},
author = {Maia, Lauro J.Q. and Laboratoire de Cristallographie, CNRS, UPR 5031, associe a l'Universite Joseph Fourier-Grenoble et a l'INPG, 25 Avenue des Martyrs, BP 166, 38042 Grenoble and Mastelaro, Valmor R. and Pairis, Sebastien and Hernandes, Antonio C. and Ibanez, Alain},
abstractNote = {A new sol-gel route was applied to obtain Y{sub 0.9}Er{sub 0.1}Al{sub 3}(BO{sub 3}){sub 4} crystalline powders and amorphous thin films by using Al(acac){sub 3}, B(OPr {sup i}){sub 3}, Y(NO{sub 3}){sub 3}.6H{sub 2}O, and Er(NO{sub 3}){sub 3}.5H{sub 2}O as starting materials dissolved in propionic acid and ethyl alcohol mixtures. Our study shows that propionic acid acts as good chelant agent for yttrium and erbium ions while ethyl alcohol allows to dissolve Al(acac){sub 3}. This process makes the resulting sols very stable to obtain homogeneous gels and transparent amorphous thin films. In addition, the propionic acid prevents the sol precipitation, making easy porous- and crack-free thin film depositions. Chemical reactions involved in the complexation were discussed. As-prepared powders and films are amorphous and present a good thermal stability due to their high glass transition (746 deg. C) and crystallization temperatures (830 deg. C). This new sol-gel route showed to be adequate to obtain dense and crack-free thin films free of organic and hydroxyl groups that can be considered as promising materials to be used in integrated optical systems. - Graphical abstract: SEM micrograph of Y{sub 0.9}Er{sub 0.1}Al{sub 3}(BO{sub 3}){sub 4} powders calcined at 400 and 700 deg. C during 24 h and heat-treated at 1150 deg. C.},
doi = {10.1016/j.jssc.2006.11.016},
journal = {Journal of Solid State Chemistry},
number = 2,
volume = 180,
place = {United States},
year = {Thu Feb 15 00:00:00 EST 2007},
month = {Thu Feb 15 00:00:00 EST 2007}
}