Neodymium Ions
Mostrando 1-12 de 12 artigos, teses e dissertações.
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1. Recovery Process Development for the Rare Earths from Permanent Magnet Scraps Leach Liquors
The current study deals with the recovery process development for the rare earths (REs), i.e., dysprosium (Dy) and neodymium (Nd), metals from permanent magnet scraps leach liquors. Its main objective is the recovery of the rare earths (Dy and Nd) from permanent magnet scraps (PMSs). Introdutory experiments were carried out to get leach liquor solution: oxid
J. Braz. Chem. Soc.. Publicado em: 2015-06
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2. Vidros de germanato com nanopartículas metálicas e semicondutoras dopados com terras-raras para aplicações em fotônica. / Germanate glasses containing metalic an semiconductor nanoparticles dopes with rare-earth ions for photonic aplicattions.
This work presents a spectroscopic study about Eu3+, Nd3+ and Er3+ rare-earth doped germanate glasses containing metallic and semiconductor nanoparticles (NPs) aiming the development of new materials for photonic applications. These glasses have a large transmission window (400-4500 nm), high refractive index (~ 1.9), low phonon energy (700 cm-1), high mecha
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 01/09/2010
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3. Estudo de parâmetros espectroscópicos de íons de Nd3+ no sistema vítreo SNAB (SiO2 Na2CO3 Al2O3 B2O3) nanoestruturado com nanocristais de CdS
In this work, experimental evidences have been observed for energy transfer from CdS nanocrystals, synthesized by the fusion method, to Nd3+ ions embedded in vitreous substrates (SNAB: SiO2 Na2O Al2O3 B2O3). These dot samples doped with neodymium have been investigated by combined optical absorption (OA), photoluminescence (PL), and time-resolved photolumine
Publicado em: 2010
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4. Novel neodymium(III) membrane sensor based on N-(2-Furylmethylene)pyridine-2,6-diamine
Através de nossos estudos, encontramos que N-(2-furilmetileno) piridina-2,6-diamina (FPD) pode ser usado como um excelente ionóforo na construção de um novo sensor baseado em membrana de poli(vinil cloreto) (PVC). Uma composição para a membrana, de 33% de PVC, 59% de nitrobenzeno (NB), 6% de FPD e 2% de borato de potássio tetrakis (p-clorofenil) (KTpC
Journal of the Brazilian Chemical Society. Publicado em: 2006-12
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5. Propriedades ópticas do poliestireno sulfonado dopado com íons de neodímio
Nesse trabalho apresentamos a síntese e caracterização óptica de filmes de poliestireno sulfonado (PSS) dopados com íons de neodímio (Nd), utilizando uma rota sintética simples e de baixo custo. O dopante utilizado foi o nitrato de neodímio. A incorporação máxima de íons Nd3+ na matriz, obtida na síntese dos filmes, ficou em torno de 14,0 %. Os
Publicado em: 2006
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6. Neodymium in hydrogenated amorphous silicon sub-nitrides (a-SiNx:H) / Neodimio em sub-nitretos de silicio amorfo hidrogenado (a-SiNx:H)
In this work, we report a study of the photoluminescence (PL) optimization of a-SiNx:H
thin films prepared by RF co-sputtering. The PL was investigated as a function of nitrogen and neodymium concentrations. We observed that the Nd ions are excited through the amorphous matrix. The excitation mechanism is more efficient in samples where the optical gap E0 Publicado em: 2005
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7. TransferÃncia E ConversÃo Ascendente de Energia em Vidros Tungstato-Fluorofosfatos Dopados com Tm3+ e Nd3+
My main interest in this work was: (1) to identify energy transfer mechanisms between rare-earth ions thulium (Tm3+) and neodymium (Nd3+); (2) to observe energy upconversion in tungstate fluorophosphate glasses doped with these ions. The motivation for this work arose from the fact that the tungstate fluorophosphate glasses present high upconversion efficien
Publicado em: 2003
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8. Caracterização espectroscópica de possíveis meios ativos para lasers de Nd3+ e Tm3+ / Spectroscopic characterization of possible Nd3+ and Tm3+ laser active media
In this work we have made an important contribution to the growing research of new laser materials that can be pumped by low cost diode lasers or by the Upconversion process to operate in the near-infrared and visible spectral regions. Three kinds of hosts, doped with the rare earth ions (Nd3+ and Tm3+) were studied, and they present potential characteristic
Publicado em: 2003
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9. Compostos de adição entre iodetos de itrio e lantanídeos(III) e a N,N,N\ ,N\ - tetrametilmalonamida / N, N, N\ , N\ - tetramethylmalonamide adducts of lanthanide iodides
Addition compounds of formula Lni3.xTMMA (x = 5 for Ln = La, Ce and x = 4 for Ln = Pr - Lu, Y) were prepared by reaction of N,N.N\ ,N\ -tetramethylmalonamide (TMMA) and lanthanide iodides in acetone. The crystalline adducts present the same, but fainter colors of the corresponding lanthanide ions; they are in general practically not hygroscopic and melt with
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/02/1979
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10. Compostos de adição entre hexafluorofosfatos de ítrio e lantanídeos (III) e a N,N - Dimetilacetamida (DNA) / N,N-Dimethylacetamide adducts of lanthanide hexafluorphosphates
The preparation and characterization of adducts between lanthanide hexafluorophosphates and DMA are described. According to elemental analysis the compounds present two general compositions: Ln(PF6)3.7DMA (Ln= La-Ho) and Ln(PF6)3.6DMA (Ln= Er-Lu, Y). The compounds are crystalline, not hygroscopic and melt between 115-125°C. They are soluble in water, nitrom
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 28/02/1977
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11. Studies of the mechanism of noradrenaline stimulation of fluid absorption by rat jejunum in vitro.
The everted-sac technique was used to study the mechanism of action of noradrenaline on fluid absorption by rat jejunum. Noradrenaline (10(-3) M) significantly stimulated fluid absorption and this effect was dependent on the presence of calcium ions in the serosal fluid. Strontium, but not magnesium could substitute for calcium. Verapamil, manganese and neod
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12. Block of current through T-type calcium channels by trivalent metal cations and nickel in neural rat and human cells.
1. The effects of the trivalent cations yttrium (Y3+), lanthanum (La3+), cerium (Ce3+), neodymium (Nd3+), gadolinium (Gd3+), holmium (Ho3+), erbium (Er3+), ytterbium (Yb3+) and the divalent cation nickel (Ni2+) on the T-type voltage gated calcium channel (VGCC) were characterized by the whole-cell patch clamp technique using rat and human thyroid C cell line