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Showing 1 to 20 of 35 for “"Magnesia"”.
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Phase Equilibria Studies in the System Magnesia - Alumina - Zirconia
Made available in DSpace on 2014-12-10T17:32:34Z (GMT). No. of bitstreams: 1 6503173.pdf: 8958432 bytes, checksum: 8bb2ae70a1597347d489ee3e30894cb5 (MD5) Previous issue date: 1964
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Dunite: Its Mineralogy, Thermal Decomposition and Reactions With Magnesia at Elevated Temperatures
Made available in DSpace on 2014-12-12T00:32:35Z (GMT). No. of bitstreams: 1 7500320.pdf: 6412303 bytes, checksum: b3e36cac13292185a93207f19dea9dd2 (MD5) Previous issue date: 1974
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Impacts of the use of magnesia versus iron on mesophilic anaerobic digestion and odors in wastewater
Addition of iron to sewer lines for chemical phosphorus removal is widely practiced around the world. However, high dosage of iron may prove detrimental to the anaerobic digestion process and also lead to higher organic sulfur odors and deteriorating biosolids quality. The following research …
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The effect of a magnesia based additive on fly ash depostition in a chain-grate boiler system.
… of leaching experiments showed that the initial magnesia concentrations were generally much higher for the deposit samples and fly ash particles from ash hoppers and grit arrestors with Lycal injection than those without.
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Electrical characterization of thick film superconductors
… conditions. Films were tested on alumina and magnesia substrates, to characterize the substrate interactions. Films were printed in different thicknesses and different widths, to determine the effect of film geometry on film quality. Finally these films were aged in a room ambient to determine …
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Remediation of contaminated land and solutions with binders derived from waste material.
… to which ordinary Portland cement (OPC), lime, magnesia, fly ash (PFA), or ground granulated blast furnace slag (GGBFS) were added to stabilise the contaminant. The optimum amounts were determined by fly ash added gradually to contaminated soil until full reduction of leachable lead was reached. …
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Performance of asphalt mixtures containing steel slag aggregate and synthetic fibers
… six months to minimize the free lime and free magnesia content, which are mainly responsible for the volume instability. Furthermore, the granite aggregates were replaced by electric arc furnace (EAF) steel slag aggregate with different proportions to identify the suitable substitution in terms …
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MOLTEN STEEL INTERACTIONS WITH TUNDISH LININGS AND REFRACTORY GLAZES
… the formation of spinel accretion occurs when a magnesia-based tundish lining material is in contact with aluminum-killed steel. This formation is limited by the ability of magnesium to transport to the interaction interface, which typically occurs due to the exudation of a liquid secondary phase …
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The networked polis: Unravelling Magnesia's place in the Hellenistic world through the digital reconstruction of journeys.
In the late third century BC, the Greek city of Magnesia-on-the-Maeander in western Anatolia embarked on a monumental building programme and dispatched religious envoys (theoroi) to more than 200 cities to inaugurate a panhellenic festival. A body of inscriptions reveals a series of journeys as far …
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Experimental and Analytical Study on the Particulate Entrainment and Dispersion From a Porous Emission Source in Wind
… The tracers used in the experiment are smoke, magnesia, latex, and glass particles. The scaling results based on the measured data indicate that the effect of particle settling due to gravity force will be significant when the particle settling velocity is greater than 0.03 m/s.
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Thermal Evolution of MAS, YSZ and GZO Thermal Barrier Coating Materials in Benign and CMAS Rich Environments
… debris. This study investigates the potential of magnesia-alumina spinel (MAS) as an alternative top coat material for TBCs due to its superior resistance to sintering and remarkable high temperature stability. The study comprises an extensive examination of the thermal evolution in MAS, …
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Evaluation of reaction kinetics and material properties of cementitious ceramic materials using ultrasonic velocity and attenuation measurements
… a range of phosphate bonded, alumina filled, magnesia ceramics and other ceramic materials... Measurements were made over a range of frequency from 50kHz - 1 OM Hz, using a variety of commercial probes and equipment, and a variety of techniques. An ultrasonic double-probe method was used to …
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Raman studies of the nanostructure of sol-gel materials
… (alumina, aluminum hydroxide, zirconia, and magnesia) were investigated, primarily by laser spectroscopy, on several series of materials prepared by systematically varying the synthesis procedures. Key material phases analyzed were: (1) nanocrystalline boehmite [AlO(OH)]; (2) bayerite, …
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The synthesis of beta alumina powders
… with soda and a stabilizer ion such as lithia or magnesia. This reaction requires a reconstructive transformation of the α-Al₂O₃ oxygen sublattice and results in a two-phase mixture of β and β"-Al₂O. In order to maximize the preferred β"-Al₂O₃ phase an additional peak heat treatment schedule is …
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Synthesis and Characterization of Pt-Ru-Sn Catalysts
<p>Magnesia-supported trimetallic Pt-Ru-Sn catalysts prepared through a cluster and a conventional synthetic route have been investigated in terms of their structural properties and their catalytic activity for the hydrogenation of citral and crotonaldehyde. FTIR results indicate that the majority …
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Exploring the improvement of HTGR economics with heat storage for variable electricity output at base-load operations
… is chosen to be ceramic brick made of alumina or magnesia, though cast iron and graphite are also considered as candidates. The system is housed in a prestressed concrete pressure vessel with an approximate volume of 25000 - 27000m3. A detailed cost analysis must be performed on this system, or …
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Flash Sintering of Alumina-based Ceramics
… ceramic like alumina also in the presence of magnesia silicate glass phase typically used for activating liquid phase sintering. The materials were studied by using different combinations of electric field and current density. Physical, structural and microstructural properties of sintered …
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Phosphine Evolution During the Quantitative Determination of Phosphorus in Cast Iron
… may be dissolved in ammonia, then treated with magnesia mixture to yield the magnesium ammonium phosphate precipitate; it may be reduced to an intensely colored substance called "molybdenum blue," and the solution used for a colorimetric measurement. (Despite the fact that this heteropoly blue …
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