Synthesis and Characterization of Nd³⁺‐Doped Indium‐sodium Tetraborate Glasses

Abstract

Glasses in the system xNd 2 O 3 •(10-x)In 2 O 3 •90Na 2 B 4 O 7 (with x＝0, 1, 3, 5 mol%) were fabricated via a melt quenching technique. The amorphous nature of the quenched glasses was confirmed by X-ray powder diffraction studies. The infrared spectra of the glasses show no boroxol ring formation in the structure of these glasses. Optical absorption of glasses shows that the transition 4 I 9/2 → 4 G 5/2 ＋ 2 G 7/2 is more intense than the other transitions, which shifts from 580 nm (for the free Nd 3＋ ion ) to 584 nm. The peak in fluorescence spectra for x＝5 mol% Nd 3＋ in the region 800-900 nm under excitation wavelength 584 nm was attributed to 4 F 3/2 → 4 I 9/2 transition. Differential thermal analysis for (x＝5 mol% Nd 3＋ ) shows glass transition (ca. 600 ℃) and crystallization temperatures (ca.1155, 975 ℃). The scanning electron microscopy studies indicate the amorphous state of glass sample.

Synthesis and Optical Characterization of Silver Doped Sodium Borate Glasses

“…Moreover, the IR spectroscopy of borate containing compounds has vibrational modes mainly active in three infrared spectral regions [9,10]:…”

Synthesis and Characterization of Indium‐borate Glass‐ceramics Containing Ho0.01Ce0.74Zr0.25O1.995 Nanorods via Incorporation Method

“…X-ray diffraction pattern of the glass sample (80Na 2 Figure 6. The mean crystallite sizes were estimated using the Scherrer equation, D＝kλ/βcos θ, where k＝0.89, λ＝0.15418 nm (Cu), β is the half peak width of the X-ray reflection and θ is the diffraction angle.…”

“…This type of borate glasses draws great attention due to their enhanced electrical and optical properties when modified by phthalocyanine or by rare earths. In our previous works, we prepared the xTb 2 O 3 •(1-x)-Na 2 B 4 O 7 glass system with 0≤x≤0.2 2 and xNd 2 O 3 • (10-x)In 2 O 3 •90Na 2 B 4 O 7 (x＝0, 1, 3, 5 mol%) 3 and characterized with XRD, UV-Vis, infrared spectroscopy, fluorescence, SEM and TG/DTA. Glass ceramics materials are polycrystalline solids containing nanometers to micrometers size crystals embedded in a residual glass matrix and are produced by devitrification of glasses ( Figure 2).…”

Technological aspects for Tb3+-doped luminescent sol–gel nanomaterials

“…Glass materials co-doped with terbium ions have been used to generate white and greenish-yellow and yellowish-green light [9][10][11][12]. The trivalent terbium ions as a perfect green emitters have been successfully used in a broad range of applications such as phosphors in fluorescent lamps, solar cells, and plasma display panels [5,7,[13][14][15][16][17][18][19][20][21][22][23]. The emission is based on the 5 D 4 -7 F J (J=6 À 3) transitions.…”

“…Characteristic luminescence of rare-earths is due to effective shielding from the effect of external forces by the 5s 2 and 5p 6 shells. Consequently the impact of external environment on spectroscopic features of rare-earth ions is negligible [7,8]. Thus, even though the rareearth ions are incorporated into the structure of different materials, the shielding effect allows to retain their "atomic" nature, which gives the characteristic narrow bands observed in rare-earth emission and excitation spectra [8].…”