Recovery of rare earth elements and sulfuric acid solution from phosphate byproducts via hydrofluoric acid conversion

JA Brahim, A Merroune, H Mazouz… - Journal of Industrial and …, 2023 - Elsevier
The recovery of high-added value products from phosphate byproducts presents currently a
great economic and environmental interests. Rare earth elements (REEs) are present in …

Structural and Photoluminescence Investigations of Tb3+/Eu3+ Co-Doped Silicate Sol-Gel Glass-Ceramics Containing CaF2 Nanocrystals

N Pawlik, B Szpikowska-Sroka, T Goryczka, J Pisarska… - Materials, 2021 - mdpi.com
In this work, the series of Tb3+/Eu3+ co-doped xerogels and derivative glass-ceramics
containing CaF2 nanocrystals were prepared and characterized. The in situ formation of …

Optical characterizations of hot‐pressed erbium‐doped calcium fluoride transparent ceramic

Z Liu, B Mei, J Song, W Li - Journal of the American Ceramic …, 2014 - Wiley Online Library
Nanoparticles of erbium‐doped calcium fluoride were synthesised by the coprecipitation
method. Micromorphology of the obtained nanoparticles was observed by transmission …

Growth, Characterization, and Efficient Continuous-Wave Laser Operation in Nd,Gd:CaF2 Single-Crystal Fibers

Z Zhang, S Wang, X Feng, Q Wu, X Qian… - Crystal Growth & …, 2020 - ACS Publications
Nd, Gd: CaF2 single-crystal fibers (SCFs) of various Nd3+ and Gd3+ concentrations were
grown by a modified temperature gradient technique (TGT) using a home-designed multi …

Study of Na+ ions influence on the charge compensating defects in CaF2: YbF3 crystals using dielectric relaxation

I Nicoara, M Stef - The European Physical Journal B, 2012 - Springer
YbF 3-doped and NaF co-doped calcium fluoride crystals were grown using the Vertical
Bridgman method. Transparent colorless crystals were obtained in graphite crucible in …

Growth and Characterization of Doped CaF2 Crystals

I Nicoara, M Stef - Modern Aspects of Bulk Crystal and Thin Film …, 2012 - books.google.com
The alkaline-earth fluorides crystallize in the cubic structure and constitute an important
class of relatively simple ionic crystals whose optical and lattice-dynamical properties have …

Erbium doped materials for bulk and waveguide laser sources emitting around 2.8 um

L Basyrova - 2023 - theses.hal.science
The main objective of this thesis work, which is a part of the ANR SPLENDID2 project, is to
explore a wide range of luminescent inorganic materials, presenting a low phonon energy …

Dislocations in doped crystals

F Cirlan, G Buse, I Nicoara - AIP Conference Proceedings, 2014 - pubs.aip.org
Three concentrations of YbF 3-doped BaF 2 crystals were grown using the conventional
Bridgman method. Transparent colorless crystals were obtained in graphite crucible in …

Dielectric relaxation in ytterbium-and lead-doped calcium fluoride crystals

M Stef, I Nicoara, F Stef - The European Physical Journal B, 2013 - Springer
Abstract YbF 3-doped and 1 mol% PbF 2 co-doped CaF 2 crystals were grown by vertical
Bridgman method using a shaped graphite furnace in vacuum. Dielectric spectra and optical …

Some dielectric and optical properties of PbF2-codoped CaF2: YbF3 crystals

M Stef, G Buse, A Pruna, I Nicoara - Physica Scripta, 2009 - iopscience.iop.org
Abstract YbF 3-doped and PbF 2-codoped CaF 2 crystals were grown using the vertical
Bridgman method. The optical absorption spectra reveal the existence of both Yb 2+ and Yb …