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Trunin, E. B.; Trunina, O.E

doi:10.1023/a:1025060926586

Cited by 4 publications

(5 citation statements)

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“…Further we assume that the particles hitting the duct wall stick on it and disappear without modifying the domain contour. Such conditions are in agreement with what previously found in [1,2,4]. Under these conditions the motion of the aggregates is purely hydrodynamic and in the case of the separation generated by the presence of the transverse force, the drift velocity of the aggregates is inversely proportional to viscous drag.…”

Section: Theorysupporting

confidence: 92%

“…The cross-hatched areas are the X domains for six Ca values Fig. 4 Dependence of the purification coefficient K on the dimensionless group Ca as indium or silicon, based on the directional transfer of the impurities originated by the application of magnetic field and crossed currents described in [1][2][3].…”

Section: Discussionmentioning

confidence: 99%

“…The purpose of our investigation is the determination of the purification efficiency for a variety of processes based on the directional transfer of impurities originated by the application of magnetic field and crossed [1][2][3]. The application of these techniques to the purification of liquid indium has been recently reported [1,4].…”

Section: Introductionmentioning

confidence: 99%

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Separation of particles from suspensions using transverse force field: a mass transport analysis

et al. 2010

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We report the calculation of the efficiency for particle separation processes occurring in suspension under transverse force field in a circular duct. The calculation has been performed for a laminar fluid flow directed toward the duct vertical axis. The force field acting on the suspended particles only, is orthogonal to the duct. In the dimensionless calculations occurs a dimensionless group, Ca, which provides a tool for the dimensioning of the purification section.

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Section: Theorysupporting

confidence: 92%

Section: Discussionmentioning

confidence: 99%

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Separation of particles from suspensions using transverse force field: a mass transport analysis

et al. 2010

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“…Our method is based on the directional transfer of impurities by applying crossed electric and magnetic fields [5,6]. We report the construction of our experimental set-up and present the results of the trace element analysis with inductively coupled plasma-optical emission spectroscopy (ICP-OES).…”

mentioning

confidence: 99%

“…It has been shown [5,6,[11][12][13][14] that electric current flowing through a liquid metal placed in a static transverse magnetic field produces forces capable of moving the impurities. The most intense of these is the Lorenz force which originates from the local variation of the current densities due to local variation of conductivity.…”

mentioning

confidence: 99%

Purification of liquid indium by electric current-induced impurity migration in a static transverse magnetic field

et al. 2009

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We have developed an original method for indium purification. Our approach is based on the directional transfer of impurities by applying crossed electric and magnetic fields to the melting volume. The method reduced the concentration of nickel and tin by a factor of 10 while copper was reduced by a factor of 3. A simple hydrodynamic mass transport model describing the process was also derived. Ó 2008 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.Keywords: Impurity migration; Indium; Inductively coupled plasma-optical emission spectroscopy (ICP-OES); Purification Since the late 1980s the demand for, and the price of, indium has increased due to the constant growth of its market [1,2]. High-purity indium is mainly used in the making of indium tin oxide (ITO) thin films for liquid crystal displays (about 65% of the total industrial consumption) and for the production of semiconductor compounds. The required level of the purity here is more than 99.9999 wt.% (6 N quality), i.e. the total concentration of the impurities should be less than 1 part per million (ppm). 6 N indium is produced by a fine purification of primary 4 N metal using different physical and physical-chemical methods (for a review, see Refs. [2,3] and references cited therein) but only physical methods can guarantee minimum contamination by any foreign chemicals or purification plant materials. Traditional crystallization methods such as zone melting and Czochralski crystal growth [4] are also used to achieve a high purification. However, these crystallization methods cannot remove from the solid phase impurities with a unit segregation coefficient, whereas most elements in the concentration range of 10 À5 % to 10 À6 % and lower possess such a segregation.In the present paper, we propose an original approach for a fine purification of indium and other low-melting-point metals. Our method is based on the directional transfer of impurities by applying crossed electric and magnetic fields [5,6]. We report the construction of our experimental set-up and present the results of the trace element analysis with inductively coupled plasma-optical emission spectroscopy (ICP-OES).The schematic configuration of our experimental setup is shown in Figure 1. Liquid indium is moved by the magnetohydrodynamic pump MHDP placed in the pumping zone Z1 via 1.5 mm diameter pipes toward the purification zone Z2, where it passes through the crossed magnetic and electric fields. The static magnetic fields with induction B of 0.6 and 0.5 T in zones Z1 and Z2, respectively, are produced by a set of samarium-cobalt block magnets [7]. The electric currents are provided by 30 A DC power supplies U1, U2 assembled in our laboratory. The electrical connectors k1, k2 equipped with 1.8 mm diameter pure tungsten rods are used to supply power to the liquid metal. All the reservoirs, pipes, pumps and connectors are made of pure Teflon Ò to avoid contamination of the liquid metal. The length of the circuit is 1.5 m, while the length of the purification zone alone i...

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Extraction of single 71Ge atoms from the gallium target of a Ga-Ge neutrino detector

Kireev

2011

Inorg Mater

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Untitled

Cited by 4 publications

References 2 publications

Separation of particles from suspensions using transverse force field: a mass transport analysis

Separation of particles from suspensions using transverse force field: a mass transport analysis

Purification of liquid indium by electric current-induced impurity migration in a static transverse magnetic field

Extraction of single 71Ge atoms from the gallium target of a Ga-Ge neutrino detector

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