Microstructure, mechanical, EPR and optical properties of lithium disilicate glasses and glass–ceramics doped with Mn2+ ions

Characterization, Luminescence, and Defect Centers of a Ce3+-Doped Li2Si2O5 Phosphor Prepared by a Solution Combustion Reaction

“…The broad peak centered at 3442 cm À1 corresponds to O-H symmetric stretching of the surface hydroxyl group. In accordance with previous work, 7,22,26 the peaks observed between 400 cm À1 and 600 cm À1 can be ascribed to Si-O-Si and O-Si-O bending vibrations. The peaks observed between 700 cm À1 and 1200 cm À1 can be ascribed to Si-O-Si symmetric stretching and Si-O-Si asymmetric stretching.…”

“…24 Zheng et al 25 have investigated the effects of P 2 O 5 content and heat treatment on the species present in the crystalline phase, and the microstructure of Li 2 Si 2 O 5 glass ceramics. The microstructure, and the mechanical, electron paramagnetic resonance, and optical properties of lithium disilicate glasses and glass ceramics doped with Mn 2+ ions have been reported by Molla et al 26 A wealth of information about the luminescence properties of a variety of cerium-doped systems is available in the literature; as far as we are aware, however, there are no reports of studies of defects in cerium-doped Li 2 Si 2 O 5 . There is also a shortage of information about the luminescence properties of Li 2 Si 2 O 5 phosphor, especially when doped with Ce 3+ ions.…”

“…Analysis of these results reveals they are in good agreement with previously reported results. 7,22,26,40 Photoluminescence Room-temperature photoluminescence spectra of Li 2 Si 2 O 5 :Ce phosphor are shown in Fig. 4.…”

Continuously tunable broadband emission of Mn2+‐doped low‐melting point Sn–F–P–O glasses for warm white light‐emitting diodes

“…The Mn 2+ EPR spectra are sensitive to the local symmetry in the glass network and in addition, give us information about the valence states and interactions. The typical resonance of the Mn 4+ in the range of 1370‐1700 Guass was not observed and the spectrum in Figure exhibits a six‐line hyperfine structure which is a characteristic of Mn 2+ ions with a nuclear spin I = 5/2 …”

Spectroscopic and magnetic behavior of Gd and Nd ions in lead–germanate glasses

“…Moreover, lead-germanate glasses can be easily obtained into fiber form and this enhances their status as materials of particular interest for telecommunications. [7,8] On the other hand, glasses and crystals containing rare earth (RE) ions have attracted great attention since the addition of these ions [7][8][9][10], as well as the addition of the transition metal ions [11][12][13][14][15], generate important properties for the host matrix. Such materials present extensive applications in fields such as information display and laser technology [7][8][9][10].…”