Results 241 to 250 of about 74,950 (296)

A new method of DTA: Theory and practice

Journal of Thermal Analysis, 1973
A novel differential thermoanalytical technique is described and discussed with regard to function, operation, performance, theory and application. Information is provided about the nature of the internal processes taking place at the time of absorption or release of energy. Notable features of the technique include high sensitivity and independence of
N. H. Sze, G. T. Meaden
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The Piloyan method in DTA studies of glass devitrification

Journal of Thermal Analysis, 1982
A kinetic analysis of the applicability of the Piloyan method to the process of glass devitrification for evaluation of the exponentn in the Johnson-Mehl-Avrami equation is carried out.
A. Marotta, A. Buri, S. Saiello
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Investigation about methods of quantitative evaluation of DTA curves

Journal of Thermal Analysis, 1977
The investigation gives a comparison of the best-known kinetic evaluation methods for DTA curves. With regard to accuracy and error-compensation, the methods of Borchardt and Daniels, Coats and Redfern and Satava and Skvara in particular are to be recommended if simple irreversible reactions are to be evaluated on the basis of homogeneous kinetics. The
H. Anderson, W. Besch, D. Haberland
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Dehydration investigations of a refractory concrete using DTA method

Journal of Thermal Analysis and Calorimetry, 2011
Characterization of adsorption-desorption (AD) processes of gas particles on semiconductors is necessary in order to investigate the influence of these processes on the micro/nano-devices performance. By applying a numerical computational method we determined the pressure dependence of the equilibrium coverage of the semiconductor surface by ...
Obradović, Nina, Terzić, Anja, Pavlović, Ljubica, Filipović, Suzana, Pavlović, Vladimir B.   +4 more
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Oxidation stability of polymeric materials dynamic DSC/DTA method

Journal of Thermal Analysis, 1982
The dynamic DSC/DTA method was observed to give better selectivity and reproducibility than the isothermal method when estimating relative oxidation stability of plastics materials. The dynamic DSC/DTA method is in this survey exposed to a round robin test.
L. Koski, K. Saarela
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DRIFTS/pyrometer-DTA—a novel simultaneous method in heterogeneous catalysis

Measurement Science and Technology, 2005
This work presents a novel simultaneous method: by coupling a pyrometer—a contactless temperature sensor—to an existing DRIFTS setup such a combination was applied for the first time. During temperature-programmed reduction of silver carbonate with ethylene (as an example), pyrometrically detected processes could be assigned to spectroscopically ...
A Griebel, A Zipp, S Philipp, A Drochner, H Vogel   +4 more
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DTA method applikation to the highest refractory oxide systems investigation

Thermochimica Acta, 1985
Abstract DTA method application to the controlled gaseous environment up to the temperature of 2600°C and TA method application in air using solar heating up to the 3000°C are considered. Phase trans formations in the highest refractory systems based on the lanthanide oxides: zirconium, hafnium, yttrium oxides as well as IIA subgroupe element oxides ...
A.V. Shevthenko, L.M. Lopato
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Studying salt systems with “wedged - out” compounds by DTA method

Thermochimica Acta, 1985
Abstract A wide application of differential-thermal analysis in studying heterogeneous equilibriums in polycomponent systems made it possible to single out a number of diagrams of state, which reveal lack of the phase of the similarly melting compound in b completely crystallized alloy. It led to the conclusion that traditional means of triangulation
A.S. Kosmynin, I.K. Garkushin, G.E. Shter, A.I. Sechnoy, A.S. Trunin   +4 more
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Selection of ammonia oxidation catalysts by a modified DTA method

Journal of Thermal Analysis, 1980
The paper presents a technique of examining catalysts by a modified DTA method in mixtures of reacting gases. The possibilities of using the obtained results for a selection of ammonia oxidation catalysts have been examined. The technique described may also be applied for the selection of catalysts in other reactions.
J. Barcicki, A. Wojnowski
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A Comparison of DTA Evaluating Methods of DTA Experiments with Tertiary Butylperpivalate as a Testing Substance

1980
To compare several methods, used to evaluate DTA experiments, the peroxide tertiary butylperpivalate was degraded. Non-isothermal conditions were applied and kinetic constants were evaluated. The results show that the methods of Borchardt-Daniels and Coats-Redfern turned out to be most appropriate.
R. B. Barendregt, J. Verhoeff, P. J. Van den Berg   +2 more
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