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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 50 for “"differential thermal analysis"”.
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A study of differential thermal analysis utilizing statistical experimental design
A study was made of the problem of differential thermal analysis utilizing statistical experimental design. A factorial type of design was chosen to yield maximum efficiency of the data obtained. “Lakeland”, Florida Kaolin of commercial whiteware grade was selected because of its relative purity. …
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I. Hydrazinosulfuric Acid. Ii. Differential Thermal Analysis of Some Heteropoly Acids of Molybdenum and Tungsten
Made available in DSpace on 2014-12-05T19:36:14Z (GMT). No. of bitstreams: 1 0013573.pdf: 4224348 bytes, checksum: ee6f1e490c675e38682bc9598dc06623 (MD5) Previous issue date: 1955
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A study of liquid clathrates
… chemical methods including: thermogravimetric analysis, differential thermal analysis and proton nuclear magnetic resonance spectroscopy.
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Mica stabilization with lime, portland cement and lime-calcium carbonate
… the stabilized soil, x-ray diffraction analyses, differential thermal analysis, and thermagravimetric analyses were made. Results show the appearance of calcium carbonate and absence of calcium hydroxide.
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Structures of Werner clathrates
… chemical methods including thermogravimetric analysis, differential thermal analysis, mass spectroscopy and proton nuclear magnetic resonance spectroscopy. Host-guest non-bonded energy relationships using atom-pair potentials are examined. Attempts have been made to estimate the association …
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Synthesis and characterization of poly-(p-phenylene pyromellitamic acid)
… near infrared, and infrared spectroscopy; differential thermal analysis; vapor pressure osmometry; and gel permeation chromatography"--Abstract, page ii.</p>
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Características geotécnicas dos depósitos de argila mole do recife a influência da matéria orgânica
… content, specific gravity and grain size analysis of dark grey to black soft organic clays from subsoil of Recife plain. No previous work has been registred for this region. Samples were treated in two different ways for the identification tests and mineralogical analysis (X-Ray …
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Biomassa para geração de energia: eucalipto, cana-energia e bagaço de cana-de-açúcar
… homogenization at 105 ° C for 24 hours. Later thermal analyzes were performed, curves Thermogravimetric/Differential thermal analysis (TG / DTA) obtained in a Thermal Analyzer. The Superior Calorific Value (PCS) was obtained according to NBR 11956, using bomb calorimeter in the dynamic mode. …
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Processing of Aluminum Alloys Containing Displacement Reaction Products
… collisions occurring during mechanical alloying. Differential thermal analysis of the mechanically alloyed powders indicated that increased milling time inhibited the initiation of the displacement reactions. It is believed that the reactions were inhibited because of heat dissipation from …
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Geologic and Economic Aspects of Lake Agassiz Clays
… effervescence, and physical properties. Differential thermal analysis was used to study minerals and impurities in the clay. </p><p>The major economic importance of the clay is the prosperity it has given agriculture in the region. The lightweight aggregate field may develop a new …
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Desenvolvimento de antisséptico bucal em pastilha para prevenção da cárie dental
… direct compression technology. Therefore, theanalysis of pharmaceutical excipients and the evaluation of the characteristics of theformulations were carried out. A preformulation study was carried out to assess thecompatibility of the active pharmaceutical ingredient (API) with the excipients …
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A study of secondary bonding effects in Werner clathrates
… obtain information on the host conformation, and thermal analysis (thermogravimatry and differential thermal analysis) was used to obtain insight into the host - guest interactions of these clathrates.
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Kinetic studies of solid-phase polycondensation in two polyamides and a polyester
… from the polymer intrinsic viscosities. The thermal behavior of selected polymers was also examined by differential thermal analysis. Poly(hexamethylene adipamide) showed an increase in the number-average molecular weight from approximately 10,000 to 22,000 when treated at 180 °C for 20 …
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The effect of composition on the viscosity, crystallization and dissolution of simple borate glasses and compositional design of borate based bioactive glasses
… system were characterized using differential thermal analysis and viscosity measurements. Characteristic viscosity (isokom) temperatures varied with the ratio between the modifier content (Na<sub>2</sub>O+CaO) and B<sub>2</sub>O<sub>3</sub>, particularly at lower temperatures, …
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The influence of the thermomechanical processing on the annealing response of 3CR12 steel
… tests and impact energy tests, dilatometry, differential thermal analysis and volume fraction analysis. Alloys in the as-rolled state exhibited an increase in martensite content related to an increase in the cooling rate following hot rolling. The increase in martensite content influenced the …
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The synthesis of beta alumina powders
… The solid state reactions were monitored by differential thermal analysis and thermogravimetric analysis. The structural development of the reaction products with increasing temperature, was monitored by powder X-ray diffraction. A significant observation was the direct formation of single …
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Injection molding of shotgun shells
… was analyzed using infrared spectroscopy and differential thermal analysis. The results from the analyses revealed that polyethylene was the main component used in the manufacture of commercial shotgun shells. An injection mold with automatic ejector mechanism was designed. Before attempting …
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Processing of Hemp Fibre Using Enzyme/Fungal Treatment for Composites
… characterization techniques, namely wet chemical analysis, Fourier-transform infrared (FT-IR), scanning electron microscopy (SEM), fibre density testing, X-ray diffraction (XRD), differential thermal analysis (DTA) and thermogravimetric analysis (TGA), zeta potential and single fibre tensile …
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Investigation of the Combustion, Emissions, and Engine Performance Characteristics of Cottonseed Biodiesel for use in Power Generation
… lower heating value, thermo-gravimetric and differential thermal analysis, and spray characteristics were analyzed. Fuel property measurements were comparable to ULSD#2 in every aspect except oxidation stability which showed the C100 being stable for a shorter period of time. Mechanical …
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Synthesis and characterisation of d-Bi2O3 related materials stabilised by substitutions of Ca, Ga, Nb and Re.
… X-ray absorption of fine structure measurements, differential thermal analysis and impedance spectroscopy. The structure of two new fluorite-related materials, Bi\(_6\)Ca\(_3\)ReO\(_{15.5}\) and Bi\(_{10}\)Ca\(_5\)ReO\(_{23.5}\), were studied. Bi\(_6\)Ca\(_3\)ReO\(_{15.5}\) formed a face-centred …
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