Raman and Infrared Spectroscopy of Barium-Gallo Germanate Glasses Containing B[sub.2]O[sub.3]/TiO[sub.2]

• Published in: Materials 2023-02, Vol.16 (4)
• Main Authors: Kowalska, Karolina, Kuwik, Marta, Pisarska, Joanna, Sitarz, Maciej, Pisarski, Wojciech A
• Format: Article
• Language: English
• Subjects: Barium; Infrared spectroscopy
• ISSN: 1996-1944; 1996-1944
• DOI: 10.3390/ma16041516

Modified barium gallo-germanate glass hosts are still worthy of attention in studying structure-property relationships. In this work, two different series of glass systems based on (60-x)GeO[sub.2]-xTiO[sub.2]-30BaO-10Ga[sub.2]O[sub.3] and (60-x)GeO[sub.2]-xB[sub.2]O[sub.3]-30BaO-10Ga[sub.2]O[sub.3] (x = 10, 30, 50 mol%) were synthesized, and their properties were studied using spectroscopic techniques. X-ray diffraction (XRD) patterns revealed that all fabricated glasses were fully amorphous material. The absorption edge shifted toward the longer wavelengths with a gradual substitution of GeO[sub.2]. The spectroscopic assignments of titanium ions were performed with excitation and emission spectra compared to the additional sample containing an extremely low content of TiO[sub.2] (0.005 mol%). On the basis of Raman and FT-IR investigations, it was found that increasing the TiO[sub.2] content caused a destructive effect on the GeO[sub.4] and GeO[sub.6] structural units. The Raman spectra of a sample containing a predominantly TiO[sub.2] (50 mol%) proved that the band was located near 650 cm[sup.−1], which corresponded to the stretching vibration of Ti-O in TiO[sub.6] unit. The deconvoluted IR results showed that the germanate glass network consisted of the coexistence of two BO[sub.3] and BO[sub.4] structural groups. Based on the experimental investigations, we concluded that the developed materials are a promising candidate for use as novel glass host matrices for doping rare-earth and/or transition metal ions.