Potassium niobophosphate glasses and glass-ceramics of the family
xNb(2)O(5).(50-x)P2O5. 50K(2)O:yFe(2)O(3) were studied by x-ray
powder diffraction, infrared and Raman scattering spectroscopy. For the
potassium-phosphate samples 50P(2)O(5)-50K(2)O the iron oxide
presents a network former behaviour, for 2 mol% of Fe2O3 doping. The
precipitation of crystalline K4Nb6O17 and ferroelectric KNbO3 crystals was confirmed by x-ray powder diffraction in the samples with x = 40 and
50 mol% respectively. The infrared and Raman scattering spectroscopy
results suggest that the increase of the ratio Nb2O5/P2O5 leads the
niobium to sites of octahedral symmetry and consequently to the
formation of ferroelectric KNbO3, as seen by x-ray diffraction analysis.
%0 Journal Article
%1 WOS:000080794200017
%A de Andrade, JS
%A Pinheiro, AG
%A Vasconcelos, IF
%A Sasaki, JM
%A de Paiva, JAC
%A Valente, MA
%A Sombra, ASB
%C TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND
%D 1999
%I IOP PUBLISHING LTD
%J JOURNAL OF PHYSICS-CONDENSED MATTER
%K imported
%N 22
%P 4451-4460
%R 10.1088/0953-8984/11/22/315
%T Raman and infrared spectra of KNbO3 in niobate glass-ceramics
%V 11
%X Potassium niobophosphate glasses and glass-ceramics of the family
xNb(2)O(5).(50-x)P2O5. 50K(2)O:yFe(2)O(3) were studied by x-ray
powder diffraction, infrared and Raman scattering spectroscopy. For the
potassium-phosphate samples 50P(2)O(5)-50K(2)O the iron oxide
presents a network former behaviour, for 2 mol% of Fe2O3 doping. The
precipitation of crystalline K4Nb6O17 and ferroelectric KNbO3 crystals was confirmed by x-ray powder diffraction in the samples with x = 40 and
50 mol% respectively. The infrared and Raman scattering spectroscopy
results suggest that the increase of the ratio Nb2O5/P2O5 leads the
niobium to sites of octahedral symmetry and consequently to the
formation of ferroelectric KNbO3, as seen by x-ray diffraction analysis.
@article{WOS:000080794200017,
abstract = {Potassium niobophosphate glasses and glass-ceramics of the family
[xNb(2)O(5).(50-x)P2O5. 50K(2)O]:yFe(2)O(3) were studied by x-ray
powder diffraction, infrared and Raman scattering spectroscopy. For the
potassium-phosphate samples [50P(2)O(5)-50K(2)O] the iron oxide
presents a network former behaviour, for 2 mol% of Fe2O3 doping. The
precipitation of crystalline K4Nb6O17 and ferroelectric KNbO3 crystals was confirmed by x-ray powder diffraction in the samples with x = 40 and
50 mol% respectively. The infrared and Raman scattering spectroscopy
results suggest that the increase of the ratio Nb2O5/P2O5 leads the
niobium to sites of octahedral symmetry and consequently to the
formation of ferroelectric KNbO3, as seen by x-ray diffraction analysis.},
added-at = {2022-05-23T20:00:14.000+0200},
address = {TEMPLE CIRCUS, TEMPLE WAY, BRISTOL BS1 6BE, ENGLAND},
author = {de Andrade, JS and Pinheiro, AG and Vasconcelos, IF and Sasaki, JM and de Paiva, JAC and Valente, MA and Sombra, ASB},
biburl = {https://www.bibsonomy.org/bibtex/24ad3e961edff4449b213701acdbf4d70/ppgfis_ufc_br},
doi = {10.1088/0953-8984/11/22/315},
interhash = {e89fb8cfa75c57cc59fbbd9f9fb68f9a},
intrahash = {4ad3e961edff4449b213701acdbf4d70},
issn = {0953-8984},
journal = {JOURNAL OF PHYSICS-CONDENSED MATTER},
keywords = {imported},
number = 22,
pages = {4451-4460},
publisher = {IOP PUBLISHING LTD},
pubstate = {published},
timestamp = {2022-05-23T20:00:14.000+0200},
title = {Raman and infrared spectra of KNbO3 in niobate glass-ceramics},
tppubtype = {article},
volume = 11,
year = 1999
}