An ion-exchange process was developed for the separation of spectrographically pure praseodymium salts in kilogram amounts from commercially available concentrates. The application of either 0.5% or 0.1% citrate solutions as eluting agents was show to result in excellent separations of praseodymium from samarium, neodymium, and lanthanum when the mixed rare earths were eluted from Amberlite IR-...

(project: 06986 " Optical Backplanes "). Microscope picture of the cross section of neodymium-complex-doped polymer channel waveguides. This thesis is dedicated to my parents， who have given me everything they could possibly give and to whom there is no way of paying back…

The concentration dependence of energy transfer upconversion in Nd:YAG is investigated via the z-scan technique. The ETU coefficient is determined to increase from 35×10 -18 cm 3 /s to 90×10 -18 cm 3 /s when the concentration increases from 0.3 at.% to 1.1 at.%. OCIS codes: (190.7220) Upconversion; (140.3530) Lasers, neodymium; (300.6460) Spectroscopy, saturation.

Besides neodymium, the chemical composition of Neodymium–Iron–Boron (NdFeB) permanent magnets possibly contains other rare earth elements (REEs) such as praseodymium, dysprosium, and terbium. Among its applications, NdFeB are essential for Hard Disk Drives (HDDs) in computers data storage, Mobile Phones (MPs), acoustic transducers. Because REEs were classified critical raw materials by European...

The Nd permanent magnet (${\mathrm{Nd}}_{2}{\mathrm{Fe}}_{14}\mathrm{B}$) is an indispensable material used in modern energy conversion devices. realization of high coercivity at finite temperatures important issue. One the ingredients for controlling coercive force surface property magnetic grains. It has been found by first-principles studies that atoms first (001) layer facing vacuum have in...

A simplified model of earth structure based on the Nd and Sr isotopic characteristics of oceanic and continental tholeiitic flood basalts is presented, taking into account the motion of crustal plates and a chemical balance for trace elements. The resulting structure that is inferred consists of a lower mantle that is still essentially undifferentiated, overlain by an upper mantle that is the r...

The properties of MIS structures with yttrium, neodymium, samarium fluorides on germanium, neodymium and n p silicon substrates, as well Al-Y 2 O 3 -nSi, -pSi under conditions high ambient humidity were studied. Additionally, the exposed to an electric field ~0.5-4 MV/cm. For films fluoride a clear increase in maximum specific capacitance increasing relative medium is observed. It has been foun...

New bis(phenolate)amine-supported neodymium borohydride complexes and their previously reported samarium analogues were tested as catalysts for the polymerisation of styrene and isoprene. Reaction of Na2O2N(L) (L = py, OMe, NMe2) with Nd(BH4)3(THF)3 afforded the borohydride complexes Nd(O2N(L))(BH4)(THF) (L = py (1-Nd), OMe (2-Nd), NMe2 (3-Nd)). Complex 1-Nd has shown a propensity to form pheno...