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Mining and pipeline transport of manganese nodulesBek-Derna, A. January 1981 (has links)
Thesis (M.S.)--University of Wisconsin--Madison, 1981. / Typescript. Includes bibliographical references (leaves 105-111).
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Synthesis and electrochemistry of mixed ligand complexes of manganeseFirsich, David William. January 1979 (has links)
Thesis--University of Wisconsin--Madison. / Typescript. Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references.
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Microchemical and textural studies of selected manganese nodules from a siliceous ooze site in the northeast equatorial PacificOlson, Dan E. January 1979 (has links)
Thesis (M.S.)--University of Wisconsin--Madison. / Typescript. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 147-155).
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Origin of manganese deposits of Busuanga Island, PhilippinesSorem, Ronald Keith, January 1958 (has links)
Thesis (Ph. D.)--University of Wisconsin--Madison, 1958. / Typescript. Abstracted in Dissertation abstracts, v. 19 (1958) no. 4, p. 774. "U. S. Geological Survey [preliminary] Open File Report." Vita. eContent provider-neutral record in process. Description based on print version record. Includes bibliographical references (leaves 132-134).
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Manganese availability in manganese-sulfur granulesLudwick, Albert Earl. January 1964 (has links)
Thesis (M.S.)--University of Wisconsin--Madison, 1964. / eContent provider-neutral record in process. Description based on print version record. Bibliography: l. 62-64.
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A magnetic balance and its application to the investigation of ferromagnetism in manganese carbon alloysShier, Richard Mowat January 1953 (has links)
A magnetic balance for the measurement of the saturation magnetization of alloys has been designed and built. The magnet develops a field strength of 21,000 oersteds in a gap approximately seven-eighths inch long and two inches in diameter, when consuming a power of 4.5 kilowatts. This field is sufficient to saturate solid metal samples of random shape.
Specially shaped pole caps are used which produce a gradient in the direction of the axis of the gap which is constant to within two percent, within a volume cube three-sixteenths of an inch on edge.
The ratio of saturation magnetizations of iron and nickel at room temperature agree closely with the accepted values.
A new magnetic phase has been discovered in the manganese carbon system. It has been identified as ferromagnetic, but its composition and crystal structure remain unknown. / Science, Faculty of / Physics and Astronomy, Department of / Graduate
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An investigation of ferromagnetic phases in manganese rich alloysShirkoff, George Peter Alexandroff January 1953 (has links)
The investigation of ferromagnetic phases in the manganese indium, manganese antimony carbon and the manganese magnesium alloy systems was conducted mainly by means of x-ray diffraction methods and where ever permissible by metal1ographic examination. The manganese indium and the manganese antimony carbon alloys were prepared in the vacuum melting furnace in an argon atmosphere, while the manganese magnesium alloys were prepared by sinter-compact techniques. Heat treatments were carried out in tube furnaces in an argon atmosphere.
Ferromagnetic phases were not found in either the manganese indium or the manganese magnesium systems. The presence of the compound Mn₃In in the manganese indium system was established. The compound has a gamma brass structure with a lattice parameter a₀ = 9.413 A°. In the manganese magnesium system only solid solutions of manganese and magnesium were found to exist. The manganese solid solution was not magnetic suggesting that the addition of magnesium atoms did not give the degree of separation of manganese atoms for favourable ferromagnetic conditions. It was concluded also that the manganese atoms in the compound Mn₃In were not sufficiently separated for favourable ferromagnetic conditions.
The ferromagnetic phase found in the manganese antimony carbon alloys was attributed to the compound Mn₂Sb. This suggested that elements in Group Vb which are strongly electronegative to manganese and form stable binary compounds, do not tend to form ternary compounds containing carbon. / Applied Science, Faculty of / Materials Engineering, Department of / Graduate
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Kinetics and mechanism of the reduction of Mamatwan manganese ore fines by solid carbonBurucu, E January 1991 (has links)
A dissertation submitted to the Faculty of Engineering,
University of Witwatersrand, Johannesburg, in fulfilment of
the requirements for the degree of Master of Science in
Engineering
Johannesburg, 1991 / The kinetics of reduction of the manganese ore from the
Mamatwan mine has been studied by thermogravimetric
(TGA) analysis, x-ray diffraction analysis (XRD),
optical microscopy, and energy dispersive analysis of
x-rays (EDAX) between 1100 and 1350 degree celcius with pure
graphite under argon atmosphere. It has been observed
that the rate and degree of reduction increased with
increasing temperature and decreasing particle size.
The effect of the different reaction atmosphere has
also been investigated by replacing argon atmosphere
with carbonmonoxide (CO) and carbondioxide (C02)' The
results clarified importance of some reactions in the
reduction mechanism of the ore.
In early stages of reduction, up to about 4 minutes of
reaction time, carbothermic reduction of higher oxides
of manqanase and iron (Mn203 and Fe2o3) to manganeous
oxide (MnO) and metallic iron respectively was observed
which was controlled by diffusional process across the
boundary layer between the solid phases. Apparent
activation energy is calculated as 61.03 kJ for this
stage which corresponds to about 30 percent reduction.
Metallization started as random nucleation of iron rich
carbides around Mno grains inside the particle. After
30 percent reduction the formation of a silicate phase
was observed. Up to 70 percent reduction at 1350oC,
reduction rate was controlled by chemical reaction
between oxide phase and gaseous phase with an apparent.
activation energy of 153 32 kJ. / MT2017
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Magnetic susceptibility of manganese compounds in high magnetic fields.Leduc, Jean January 1969 (has links)
No description available.
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Preparation and study of some manganese(I) carbonyl complexes /Hartman, Frederick Anthony January 1966 (has links)
No description available.
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