Structural studies of iron doped B₂O₃•0.7PbO•0.3Ag₂O glasses by FT-IR and Raman spectroscopies

• Опубліковано в: : Semiconductor Physics Quantum Electronics & Optoelectronics
• Дата: 2008
• Автори: Timar, V., Raluca Lucacel-Ciceo, Ardelean, I.
• Формат: Стаття
• Мова: Англійська
• Опубліковано: Інститут фізики напівпровідників імені В.Є. Лашкарьова НАН України 2008
• Онлайн доступ: https://nasplib.isofts.kiev.ua/handle/123456789/119051
• Назва журналу: Digital Library of Periodicals of National Academy of Sciences of Ukraine
• Цитувати: Structural studies of iron doped B₂O₃•0.7PbO•0.3Ag₂O glasses by FT-IR and Raman spectroscopies / V. Timar, Raluca Lucacel-Ciceo, I. Ardelean // Semiconductor Physics Quantum Electronics & Optoelectronics. — 2008. — Т. 11, № 3. — С. 221-225. — Бібліогр.: 30 назв. — англ.

Glasses from xFe₂O₃·(100-x)[3B₂O₃·0.7PbO·0.3Ag₂O] system, with
 0 ≤ x ≤ 20 mol.%, were prepared and investigated by means of two complementary
 spectroscopic methods, FT-IR absorption and Raman scattering in order to obtain
 information concerning the network structure. Both FT-IR and Raman spectroscopic
 techniques have revealed changes in the local structure of the glasses when the
 composition is modified. The iron ions modifier role is pointed out by the shape of the
 recorded spectra, changed with increasing the Fe₂O₃ content. The influence of a gradual
 addition of the iron oxide on the local structure of silver lead borate based glasses has
 been studied. The FT-IR data indicate the presence of the BO₃ and BO₄ structural units in
 the glasses, the network structure being mainly built by: di-, tri-, tetra-, penta- and orthoborate
 groups. The characteristic bands of the different structural groups evidenced in
 these glasses were identified and quantitatively analyzed after increasing the Fe₂O₃
 content. The Fe₂O₃ content dependence of Ar (A₄/A₃) ratio (where the values A₄ and A₃
 reflect the relative amount of tetra-, respectively tri-coordinated boron atoms) was
 studied. In addition, characteristic vibrational modes of bonds from iron, lead and silver
 oxides were detected in the FT-IR spectra. Raman data is in accordance with the FT-IR
 results and complete them. Using Raman scattering, we detected new structural groups as
 pyro-, ditri- and dipenta-borate groups, indicating changes in the structure of our glasses
 after Fe₂O₃ addition