%0 Journal Article %1 WOS:000172827300039 %A Almeida, AFL %A Thomazini, D %A Vasconcelos, IF %A Valente, MA %A Sombra, ASB %C THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND %D 2001 %I ELSEVIER SCI LTD %J INTERNATIONAL JOURNAL OF INORGANIC MATERIALS %K X-ray diffraction} glass-ceramics; triborate; {lithium %N 7 %P 829-838 %R 10.1016/S1466-6049(01)00172-6 %T Structural studies of lithium triborate (LBO-LiB3O5) in borophosphate glass-ceramics %V 3 %X In this paper lithium borophosphate glasses and glass-ceramics in the system 0.75 textbackslash xB(2)O(3).(100-x)P2O5textbackslash .25Li(2)O.yFe(2)O(3) with 0 less than or equal tox:less than or equal to 100 mol.% and y=4 mol.%, were studied by X-ray powder diffraction, Mossbauer and infrared spectroscopy. All the samples in the system present a glass or glass-ceramic behavior which was confirmed by X-ray diffraction. From our Mossbauer analysis, high spin Fe2+ and Fe3+ in a distorted octahedral coordination are present in all samples. One can conclude that both iron ions are at sites of distorted octahedral coordination, acting as network modifiers (NWM) in a very broad site distribution, which is characteristic of an amorphous structural neighborhood. Such glasses and glass-ceramics containing nonlinear optical materials formed in a controlled crystallization process would be interesting candidates for applications in new nonlinear optical devices. (C) 2001 Elsevier Science Ltd. All rights reserved.

@article{WOS:000172827300039, abstract = {In this paper lithium borophosphate glasses and glass-ceramics in the system 0.75 textbackslash xB(2)O(3).(100-x)P2O5textbackslash .25Li(2)O.yFe(2)O(3) with 0 less than or equal tox:less than or equal to 100 mol.% and y=4 mol.%, were studied by X-ray powder diffraction, Mossbauer and infrared spectroscopy. All the samples in the system present a glass or glass-ceramic behavior which was confirmed by X-ray diffraction. From our Mossbauer analysis, high spin Fe2+ and Fe3+ in a distorted octahedral coordination are present in all samples. One can conclude that both iron ions are at sites of distorted octahedral coordination, acting as network modifiers (NWM) in a very broad site distribution, which is characteristic of an amorphous structural neighborhood. Such glasses and glass-ceramics containing nonlinear optical materials formed in a controlled crystallization process would be interesting candidates for applications in new nonlinear optical devices. (C) 2001 Elsevier Science Ltd. All rights reserved.}, added-at = {2022-05-23T20:00:14.000+0200}, address = {THE BOULEVARD, LANGFORD LANE, KIDLINGTON, OXFORD OX5 1GB, OXON, ENGLAND}, author = {Almeida, AFL and Thomazini, D and Vasconcelos, IF and Valente, MA and Sombra, ASB}, biburl = {https://www.bibsonomy.org/bibtex/2977b801b95e689fe243e484b150a1b29/ppgfis_ufc_br}, doi = {10.1016/S1466-6049(01)00172-6}, interhash = {f16b9142a5c5d15aa9069d4556324526}, intrahash = {977b801b95e689fe243e484b150a1b29}, issn = {1466-6049}, journal = {INTERNATIONAL JOURNAL OF INORGANIC MATERIALS}, keywords = {X-ray diffraction} glass-ceramics; triborate; {lithium}, number = 7, pages = {829-838}, publisher = {ELSEVIER SCI LTD}, pubstate = {published}, timestamp = {2022-05-23T20:00:14.000+0200}, title = {Structural studies of lithium triborate (LBO-LiB3O5) in borophosphate glass-ceramics}, tppubtype = {article}, volume = 3, year = 2001 }