In this work, X-ray diffraction, Raman spectroscopy and differential
scanning calorimetry techniques were used to understand the
crystallization process on 20Li(2)O-80TeO(2) glass. X-ray diffraction
results reveal the presence of three distinct alpha gamma-TeO2,
alpha-TeO2 and alpha-Li2Te2O5 crystalline phases in the glass matrix.
The Raman spectroscopy band structure of this glass is similar to the
one observed in glassy TeO2, Raman results clearly reveal the metastable
character of the gamma-TeO2 phase in the 20Li(2)O-80TeO(2) glass, whose
associated vibration modes disappear completely at temperatures higher
than 315 degrees C. On the other hand, the Raman modes associated to
alpha-TeO2 and alpha-Li2Te2O5 phases persists up to temperatures close
to the final stages of the crystallization in the studied glass (around
420 degrees C). From DSC measurements, the activation energies 296 +/- 3
and 298 +/- 1 kJ mol(-1) were associated to gamma-TeO2 and alpha-TeO2
phases crystallization, indicating that these phases crystallizes at
temperatures very close in the studied glass. (C) 2009 Elsevier Ltd. All
rights reserved.
%0 Journal Article
%1 WOS:000266852500026
%A Araujo, E B
%A Idalgo, E
%A Moraes, A P A
%A Filho, A G Souza
%A Filho, J Mendes
%C THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND
%D 2009
%I PERGAMON-ELSEVIER SCIENCE LTD
%J MATERIALS RESEARCH BULLETIN
%K X-ray diffraction} spectroscopy; {Raman
%N 7
%P 1596-1600
%R 10.1016/j.materresbull.2009.01.019
%T Crystallization kinetics and thermal properties of 20Li(2)O-80TeO(2)
glass
%V 44
%X In this work, X-ray diffraction, Raman spectroscopy and differential
scanning calorimetry techniques were used to understand the
crystallization process on 20Li(2)O-80TeO(2) glass. X-ray diffraction
results reveal the presence of three distinct alpha gamma-TeO2,
alpha-TeO2 and alpha-Li2Te2O5 crystalline phases in the glass matrix.
The Raman spectroscopy band structure of this glass is similar to the
one observed in glassy TeO2, Raman results clearly reveal the metastable
character of the gamma-TeO2 phase in the 20Li(2)O-80TeO(2) glass, whose
associated vibration modes disappear completely at temperatures higher
than 315 degrees C. On the other hand, the Raman modes associated to
alpha-TeO2 and alpha-Li2Te2O5 phases persists up to temperatures close
to the final stages of the crystallization in the studied glass (around
420 degrees C). From DSC measurements, the activation energies 296 +/- 3
and 298 +/- 1 kJ mol(-1) were associated to gamma-TeO2 and alpha-TeO2
phases crystallization, indicating that these phases crystallizes at
temperatures very close in the studied glass. (C) 2009 Elsevier Ltd. All
rights reserved.
@article{WOS:000266852500026,
abstract = {In this work, X-ray diffraction, Raman spectroscopy and differential
scanning calorimetry techniques were used to understand the
crystallization process on 20Li(2)O-80TeO(2) glass. X-ray diffraction
results reveal the presence of three distinct alpha gamma-TeO2,
alpha-TeO2 and alpha-Li2Te2O5 crystalline phases in the glass matrix.
The Raman spectroscopy band structure of this glass is similar to the
one observed in glassy TeO2, Raman results clearly reveal the metastable
character of the gamma-TeO2 phase in the 20Li(2)O-80TeO(2) glass, whose
associated vibration modes disappear completely at temperatures higher
than 315 degrees C. On the other hand, the Raman modes associated to
alpha-TeO2 and alpha-Li2Te2O5 phases persists up to temperatures close
to the final stages of the crystallization in the studied glass (around
420 degrees C). From DSC measurements, the activation energies 296 +/- 3
and 298 +/- 1 kJ mol(-1) were associated to gamma-TeO2 and alpha-TeO2
phases crystallization, indicating that these phases crystallizes at
temperatures very close in the studied glass. (C) 2009 Elsevier Ltd. All
rights reserved.},
added-at = {2022-05-23T20:00:14.000+0200},
address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, ENGLAND},
author = {Araujo, E B and Idalgo, E and Moraes, A P A and Filho, A G Souza and Filho, J Mendes},
biburl = {https://www.bibsonomy.org/bibtex/248e2f915c7fd0fb6413a4532d096f903/ppgfis_ufc_br},
doi = {10.1016/j.materresbull.2009.01.019},
interhash = {50b54b8730dd18c4fe0469c1e148829d},
intrahash = {48e2f915c7fd0fb6413a4532d096f903},
issn = {0025-5408},
journal = {MATERIALS RESEARCH BULLETIN},
keywords = {X-ray diffraction} spectroscopy; {Raman},
number = 7,
pages = {1596-1600},
publisher = {PERGAMON-ELSEVIER SCIENCE LTD},
pubstate = {published},
timestamp = {2022-05-23T20:00:14.000+0200},
title = {Crystallization kinetics and thermal properties of 20Li(2)O-80TeO(2)
glass},
tppubtype = {article},
volume = 44,
year = 2009
}