Structural and optical characterization of Gd2SiO5:Tb3+ crystal obtained by optical floating zone method

Sensitization Mechanism of Alumina Aerogels: Introducing Gd3+ as a Sensitizing Ion to Enhance the Luminescence Intensity of Tb3+

“…In Tb 3d spectra, the absorption peaks at 1241 eV and 1279 eV correspond to Tb 3 + . In the spectrum of Gd 4d, the absorption peaks at 142 eV and 148 eV corresponded to Gd 3 + , which was basically consistent with the peak positions of Tb 3d and Gd 4d in the standard peak spectrum, [27,28] indicating that Tb and Gd in the Al 2 O 3 aerogel matrix mainly existed in positive trivalent form.…”

“…In Tb 3d spectra, the absorption peaks at 1241 eV and 1279 eV correspond to Tb 3 + . In the spectrum of Gd 4d, the absorption peaks at 142 eV and 148 eV corresponded to Gd 3 + , which was basically consistent with the peak positions of Tb 3d and Gd 4d in the standard peak spectrum,[27,28] indicating that Tb and Gd in the Al 2 O 3 aerogel matrix mainly existed in positive trivalent form.Figure4(a)-(j) showed the microscopic morphology and composition analysis of the sample after annealing at 550 °C. As illustrated in Figure4(a) and (b), when Tb 3 + ions were incorporated alone, the Al 2 O 3 aerogel matrix had a relatively smooth spherical structure [29].…”

Crystal Growth of the R2SiO5 Compounds (R = Dy, Ho, and Er) by the Floating Zone Method Using a Laser-Diode-Heated Furnace

“…We first tried to grow a crystal boule of Ho 2 SiO 5 in air atmosphere, in a flow of 1 L/min, using a four-mirror halogen lamp optical image furnace (Model FZ-T-10000-H-VI-VP-PC, Crystal Systems Corporation, Hokuto, Japan), equipped with four 1 kW halogen lamps, in similar conditions to the ones used for the crystal growth by the FZ method of similar rare earth silicate compounds [53,55]. Despite the fact that the feed rod could be molten, our attempts to form a stable molten zone failed.…”

“…The effectiveness of this method arises from the lack of crucible or solvent during the growth process, preventing thus the contamination of the boules. A Tb doped Gd 2 SiO 5 crystal was obtained using an optical floating zone (FZ) furnace, however, the authors reported limited information regarding the growth process and crystal quality of the grown boule [53]. Other related compounds, R 2 Si 2 O 7 , have been previously grown using optical FZ furnaces, however, the boules tended to have a high number of thermally generated cracks, and single grains isolated from the crystal boules were of relatively small sizes [54,55].…”