Synthesis of Rare Earth Compounds from Phosphor Coating of Spent Fluorescent Lamps

2020 ◽  
Vol 50 (1) ◽  
pp. 96-112
Author(s):  
Amit Anand ◽  
Randhir Singh
Keyword(s):  
Rare Earth ◽  
Rare Earth Compounds ◽  
Fluorescent Lamps ◽  
Phosphor Coating

Leaching of Rare Earth Metals from Phosphor Coating of Waste Fluorescent Lamps

2018 ◽  
Vol 72 (3) ◽  
pp. 623-634 ◽  
Author(s):  
Amit Anand ◽  
Randhir Singh ◽  
Abdul Rauf Sheik ◽  
Malay Kumar Ghosh ◽  
Kali Sanjay
Keyword(s):  
Rare Earth ◽  
Rare Earth Metals ◽  
Fluorescent Lamps ◽  
Phosphor Coating

scholarly journals Production of Porous Ceramic Materials from Spent Fluorescent Lamps

2021 ◽  
Vol 11 (13) ◽  
pp. 6056
Author(s):  
Egle Rosson ◽  
Acacio Rincón Rincón Romero ◽  
Denis Badocco ◽  
Federico Zorzi ◽  
Paolo Sgarbossa ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Elements ◽  
High Speed ◽  
Porous Ceramic ◽  
Ceramic Materials ◽  
Porous Ceramics ◽  
Fluorescent Lamps ◽  
Naoh Solution ◽  
Commercial Glass ◽  
Triton X

Spent fluorescent lamps (SFL) are classified as hazardous materials in the European Waste Catalogue, which includes residues from various hi-tech devices. The most common end-of-life treatment of SFL consists in the recovery of rare earth elements from the phosphor powders, with associated problems in the management of the glass residues, which are usually landfilled. This study involves the manufacturing of porous ceramics from both the coarse glass-rich fraction and the phosphor-enriched fraction of spent fluorescent lamps. These porous materials, realizing the immobilization of Rare Earth Elements (REEs) within a glass matrix, are suggested for application in buildings as thermal and acoustic insulators. The proposed process is characterized by: (i) alkaline activation (2.5 M or 1 M NaOH aqueous solution); (ii) pre-curing at 75 °C; (iii) the addition of a surfactant (Triton X-100) for foaming at high-speed stirring; (iv) curing at 45 °C; (v) viscous flow sintering at 700 °C. All the final porous ceramics present a limited metal leaching and, in particular, the coarse glass fraction activated with 2.5 M NaOH solution leads to materials comparable to commercial glass foams in terms of mechanical properties.

The fermi momenta of some face centred cubic rare earth compounds

1965 ◽  
Vol 14 (3) ◽  
pp. 179-180 ◽  
Author(s):  
M.I. Darby ◽  
K.N.R. Taylor
Keyword(s):  
Rare Earth ◽  
Rare Earth Compounds

Crystal field and valence change effects in anomalous rare-earth compounds

1976 ◽  
Vol 3 (1-2) ◽  
pp. 67-83 ◽  
Author(s):  
B. Coqblin ◽  
A.K. Bhattacharjee ◽  
B. Cornut ◽  
F. Gonzalez-Jimenez ◽  
J.R. Iglesias-Sicardi ◽  
...  
Keyword(s):  
Rare Earth ◽  
Crystal Field ◽  
Rare Earth Compounds ◽  
Valence Change

Ferromagnetic Ground States with High Transition Temperatures in New Tetragonal Rare-Earth Compounds CeRu2Al2B and PrRu2Al2B

2012 ◽  
Vol 81 (4) ◽  
pp. 043704 ◽  
Author(s):  
Eiichi Matsuoka ◽  
Yo Tomiyama ◽  
Hitoshi Sugawara ◽  
Takahiro Sakurai ◽  
Hitoshi Ohta
Keyword(s):  
Rare Earth ◽  
Ground States ◽  
Transition Temperatures ◽  
Rare Earth Compounds ◽  
High Transition

NMR and magnetization of rare-earth compounds

1998 ◽  
Vol 177-181 ◽  
pp. 1071-1072 ◽  
Author(s):  
P. Rösch ◽  
J. Weizenecker ◽  
M.T. Kelemen ◽  
J. Ruf ◽  
C. Zobel ◽  
...  
Keyword(s):  
Rare Earth ◽  
Rare Earth Compounds
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