Results 271 to 280 of about 11,032,615 (302)

The acidity of dealuminated clinoptilolite investigated by DSC, DTA and TG methods

Thermochimica Acta, 1992
Abstract Dealuminated NH 4 + -clinoptilolite samples, prepared using (NH 4 ) 2 SiF 6 and calcined at various temperatures, were used for the investigation of acidity properties. The strength of the acid sites was measured by a combination of TG and DSC measurements.
F. Grejták, I. Horváth, M. Kubranová, J. Krajčovič   +3 more
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ChemInform Abstract: DTA as a Method of Studying Chemical Reactions at High Pressures.

ChemInform, 1987
AbstractTwo DTA techniques which allow to study chemical reactions under high pressure in situ are described.
V. V. AVDEEV, V. Z. MORDKOVICH
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A New Isothermal DTA Method for the Study of Surfactants at Liquid Surfaces

1980
A new isothermal DTA method for the detection and study of surfactants at the liquid/vapour interface is presented, In this method a certain mass of liquid is slightly superheated above its boiling point in two identical vessels by a constant heat input.
H. K. Cammenga, H.-J. Petrick
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Analysis of Alloys Using DTA and TD Methods with Simultaneous Thermomagnetic Studies

Journal of Thermal Analysis and Calorimetry, 1999
A modified thermoanalyzer for investigation ferromagnetic materials as metals and alloys is described. Conventional analog phase detection technique is replaced by specialized digital one which added some new outstanding features of the instrumentation.
P. Myśliński, P. Kamasa, J. Vandlik
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On the method of bae for the determination of kinetic parameters from DTA curves

Journal of Thermal Analysis, 1980
The mathematical error in the method proposed by Bae for the determination of kinetic parameters from DTA curves has been corrected. The proposed equation does not contain thermal constants of the apparatus, and can be applied to DTA curves by an iterative method.
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Examination of the decomposition of CaBr2 with the method of simultaneous TG, DTG, DTA and EGA

Journal of Thermal Analysis, 1979
The thermal behaviour of anhydrous CaBr2 in N2 and O2 atmospheres containing H2O was investigated with the method of simultaneous TG, DTG, DTA and EGA (derivatograph). A method for the continuous determination of the amounts of Br2 and HBr evolved from the heated sample was elaborated in the presence of each other, and the course of the gas evolution ...
F. Paulik, J. Paulik, É. Buzágh-Gere, M. Arnold   +3 more
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STUDY OF CLATHRATE HYDRATION OF CARBOXYLIC ION EXCHANGER BY DTA METHOD

Solvent Extraction and Ion Exchange, 2000
ABSTRACT The effect of ionic composition [(C4H9) 4N-, H + (C4H9)N- and H-forms] and degree of swelling of a polyacrylic ion exchanger on the formation and stability of crystalline clathrate hydrates is studied. The melting temperature of clathrates for ion exchanger in the mixed ion form is to a large extent determined by the ratio of counter-ions. For
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Calorific Value Determination of Coals by DTA and ASTM Methods. Comparative study

Journal of Thermal Analysis and Calorimetry, 2001
This research comprises the applicability of complex thermal analysis technique (TG/DTG, DTA) in the determination of calorific values of coals of different origin. The calorific values, those obtained by thermal analysis are compared with an adiabatic bomb calorimeter by the standard ASTM method, and the results are discussed.
M. V. Kök, C. Keskin
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Use of kinetic DTA and TG methods for compatibility tests on 2,4,6‐‐trinitrotoluene

Propellants, Explosives, Pyrotechnics, 1986
AbstractWe have investigated the suitability of thermoanalytical methods for compatibility tests on explosives and contact materials. DTA and TG curves of various materials were evaluated using two DTA and four TG methods and one DSC method. TNT was used as model substance.
M. Hemmilä, I. Nieminen, A. Kariniemi, J. Valkonen   +3 more
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Change determination of total enthalpy and enthalpies of transformations by the method of quantitative DTA

Thermochimica Acta, 1985
Abstract Employing computing technique for data collection and processing in quantitative DTA makes it possible to determine the enthalpies of transformations or reactions without necessity to define peak area by the interpolation of its basic line. The DTA curve is transforied into teaperature dependance expressing the total change of heated aterial
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