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Showing 1 to 15 of 15 for “"Manganese content"”.
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The effect of manganese doping on the superconducting transition temperature and the upper critical field of tin-molybdenum-sulfide
… Tc' and the upper critical field, Hc2 (T), of manganese-doped SnMo6S8 (MnxSn1_xMo6S8)' These samples had reproducible superconducting properties. They were characterized by x-ray powder diffractometry, optical microscopy. electron microscopy, and electron microprobe work. The transition …
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The effect of the lime-molybdenum interaction on some properties of pasture soils
… structure, earthworm populations, organic matter content, mineralisation of soil nitrogen, exchangeable manganese content, and phosphate fixing power of the soil due to treatment in the field with lime and with molybdenum.
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The available nutrients in selected deer browse species growing on different soils
… analyzed for calcium, phosphorus, cobalt, and manganese. Soil samples were collected on each area and analyzed by a flame spectrophotometer, LeMotte Soil Testing Outfit, and a rapid method. The soil which arose from the Brallier study area was lowest in value for phosphorous and second highest …
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Evaluation of procedures for recovering manganese from a Carroll County, Virginia, ore
Manganese is a metal of strategic importance which is vital to the steel industry. In the production of steel, the two main uses of manganese are as a deoxidizer and as an alloying constituent. Approximately 13 pounds of manganese are used for each ton of steel, and for this use alone, the …
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Effect of Microstructure on Mechanical Properties of High Strength Steel Weld Metals
The effects of variations in alloying content on the microstructure and mechanical properties of high strength steel weld metals have been studied. Based on neural network modelling, weld metals were produced using shielded metal arc welding with nickel at 7 or 9 wt. %, manganese at 2 or 0.5 wt. % …
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Unidirectional solidification studies of ingot mould cast irons
… mass %). Thermodynamic data indicates that the manganese content of the iron (0.8 mass %) should reduce free sulphur to very low values but, even so, the higher sulphur composition (0.1 mass %) showed retardation of graphitic eutectic formation compared with the other two levels. Titanium's …
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A techno-economic comparison of three process routes for the treatment of Gamsberg zinc ore
… Regardless of its size, the low zinc and high manganese content of the sphalerite combined with the low zinc price prohibits the development of the deposit. Sphalerite is the most common zinc mineral, hence 95 % of the world’s zinc production is from this mineral. Sphalerite is currently …
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Oxidation and morphology of iron and iron alloy droplets.
… as the quenchant.Pure iron and a range of iron-manganese, iron-chromium and iron-silicon alloys were investigated. Whereas the iron-manganese system showed increasing oxygen pick-up with increasing manganese content, the iron-chromium and iron-silicon systems showed an inversion in oxidation …
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Carbon deposition on transition metal- and uranium-oxides
… on a range of transition metal spinels, manganese oxides, uranium oxides and single crystal magnetite samples with a view to furthering knowledge of catalytic reactions that may occur within an AGR. In particular, the effect of mixed valency on deposition rates was studied. The spinels …
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The contribution of manganese oxides to redox buffering in selected soils of the South African Highveld
… The major difference between these soils was the manganese content, with manganiferous soils lacking the expression of mottles. Results from XRF abd chemical extractions indicated that the dolomites had the highest Mn content while the quartzites and granites had negligible Mn contents. It was not …
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Response of kikuyu grass (Pennisetum clandestinum) to irrigation with saline, sodic wastes and nitrogenous, manganiferous effluent
The Manganese Metal Company (MMC) situated in Nelspruit, Eastern Transvaal, South Africa produces a manganiferous saline effluent from a manganese ore leaching process. The high NH₄ content of the waste has been identified as a possible nitrogen fertilizer source. Irrigation of the MMC waste over …
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Stability of dental alloys in artificial saliva: an electrochemical and XPS investigation
… (7 days) the nominal composition of oxidized manganese (18%) is found. Molybdenum in the film is slightly enriched. Angular resolved XPS performed on samples exposed at 37°C clearly indicate that the outer part of the passive film is composed essentially of iron oxy-hydroxide whereas chromium …
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Extractable chromium, iron, and manganese from two Michigan soils as related to soil pH and applied chromium
Thesis (M.S.)--Michigan State University. Dept. of Crop and Soil Sciences,
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Phase coherent transport phenomena in HgTe quantum well structures
… With a well width of more than 6 nm and a manganese content of less than 7% they exhibit an inverted band alignment. Band structure calculations based on self consistent Hartree calculations have been presented. The common description of a diluted magnetic semiconductor with the Brillouin …