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Title: Synthesis of samarium sesquioxide from the thermal decomposition of samarium oxychloride

Abstract

In this work, Sm{sub 2}O{sub 3} was synthesized from the thermal decomposition of SmOCl (P4/nmm). The process was studied by gravimetry under flowing air between 600 deg. C and 950 deg. C. Reactants and products were identified and analyzed by X-ray diffraction and energy dispersive spectroscopy. From the results, the stoichiometry of the reaction was obtained. Between 800 deg. C and 950 deg. C, the successive formation of both cubic Sm{sub 2}O{sub 3} (Ia3) and monoclinic Sm{sub 2}O{sub 3} (C2/m) phases was observed. Below 800 deg. C, no transformation of cubic Sm{sub 2}O{sub 3} to monoclinic Sm{sub 2}O{sub 3} was detected. Quantification of phases was made using the Rietveld Method. Combined with the analysis of the evolution of the microstructure by scanning electron microscopy, an elemental analysis of the kinetics of the reaction was made and a reaction scheme was proposed.

Authors:
 [1];  [2];  [3];  [4]
  1. Centro Atomico Bariloche, Comision Nacional de Energia Atomica, S.C. de Bariloche (R8402AGP), Rio Negro (Argentina). E-mail: esquivel@cab.cnea.gov.ar
  2. Consejo Nacional de Investigaciones Cientificas y Tecnicas, S.C. de Bariloche (R8402AGP), Rio Negro (Argentina)
  3. Centro Atomico Bariloche, Comision Nacional de Energia Atomica, S.C. de Bariloche (R8402AGP), Rio Negro (Argentina)
  4. (R8402AGP), Rio Negro (Argentina)
Publication Date:
OSTI Identifier:
21000609
Resource Type:
Journal Article
Resource Relation:
Journal Name: Materials Research Bulletin; Journal Volume: 42; Journal Issue: 3; Other Information: DOI: 10.1016/j.materresbull.2006.06.012; PII: S0025-5408(06)00255-8; 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:
36 MATERIALS SCIENCE; CHEMICAL PREPARATION; GRAVIMETRY; MICROSTRUCTURE; MONOCLINIC LATTICES; OXYCHLORIDES; PYROLYSIS; SAMARIUM CHLORIDES; SAMARIUM OXIDES; SCANNING ELECTRON MICROSCOPY; SPECTROSCOPY; STOICHIOMETRY; TETRAGONAL LATTICES; X-RAY DIFFRACTION

Citation Formats

Esquivel, M.R., Bohe, A.E., Pasquevich, D.M., and Consejo Nacional de Investigaciones Cientificas y Tecnicas, S.C. de Bariloche. Synthesis of samarium sesquioxide from the thermal decomposition of samarium oxychloride. United States: N. p., 2007. Web. doi:10.1016/j.materresbull.2006.06.012.
Esquivel, M.R., Bohe, A.E., Pasquevich, D.M., & Consejo Nacional de Investigaciones Cientificas y Tecnicas, S.C. de Bariloche. Synthesis of samarium sesquioxide from the thermal decomposition of samarium oxychloride. United States. doi:10.1016/j.materresbull.2006.06.012.
Esquivel, M.R., Bohe, A.E., Pasquevich, D.M., and Consejo Nacional de Investigaciones Cientificas y Tecnicas, S.C. de Bariloche. Thu . "Synthesis of samarium sesquioxide from the thermal decomposition of samarium oxychloride". United States. doi:10.1016/j.materresbull.2006.06.012.
@article{osti_21000609,
title = {Synthesis of samarium sesquioxide from the thermal decomposition of samarium oxychloride},
author = {Esquivel, M.R. and Bohe, A.E. and Pasquevich, D.M. and Consejo Nacional de Investigaciones Cientificas y Tecnicas, S.C. de Bariloche},
abstractNote = {In this work, Sm{sub 2}O{sub 3} was synthesized from the thermal decomposition of SmOCl (P4/nmm). The process was studied by gravimetry under flowing air between 600 deg. C and 950 deg. C. Reactants and products were identified and analyzed by X-ray diffraction and energy dispersive spectroscopy. From the results, the stoichiometry of the reaction was obtained. Between 800 deg. C and 950 deg. C, the successive formation of both cubic Sm{sub 2}O{sub 3} (Ia3) and monoclinic Sm{sub 2}O{sub 3} (C2/m) phases was observed. Below 800 deg. C, no transformation of cubic Sm{sub 2}O{sub 3} to monoclinic Sm{sub 2}O{sub 3} was detected. Quantification of phases was made using the Rietveld Method. Combined with the analysis of the evolution of the microstructure by scanning electron microscopy, an elemental analysis of the kinetics of the reaction was made and a reaction scheme was proposed.},
doi = {10.1016/j.materresbull.2006.06.012},
journal = {Materials Research Bulletin},
number = 3,
volume = 42,
place = {United States},
year = {Thu Mar 22 00:00:00 EDT 2007},
month = {Thu Mar 22 00:00:00 EDT 2007}
}